+

WO1999006864A1 - Dispositifs de couplage par reseau de diffraction - Google Patents

Dispositifs de couplage par reseau de diffraction Download PDF

Info

Publication number
WO1999006864A1
WO1999006864A1 PCT/US1998/015328 US9815328W WO9906864A1 WO 1999006864 A1 WO1999006864 A1 WO 1999006864A1 US 9815328 W US9815328 W US 9815328W WO 9906864 A1 WO9906864 A1 WO 9906864A1
Authority
WO
WIPO (PCT)
Prior art keywords
coupler
set forth
wavelength
grating
waist
Prior art date
Application number
PCT/US1998/015328
Other languages
English (en)
Inventor
Anthony S. Kewitsch
George Rakuljic
Xiaolin Tong
Phil A. Willems
Original Assignee
Arroyo Optics, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Arroyo Optics, Inc. filed Critical Arroyo Optics, Inc.
Priority to JP2000505537A priority Critical patent/JP2001512244A/ja
Priority to AU86618/98A priority patent/AU738851B2/en
Priority to EP98937997A priority patent/EP1002248A1/fr
Priority to CA002296345A priority patent/CA2296345A1/fr
Publication of WO1999006864A1 publication Critical patent/WO1999006864A1/fr

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
    • G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
    • G02B6/02123—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating
    • G02B6/02133—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating using beam interference
    • G02B6/02138—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating using beam interference based on illuminating a phase mask
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
    • G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
    • G02B6/02114—Refractive index modulation gratings, e.g. Bragg gratings characterised by enhanced photosensitivity characteristics of the fibre, e.g. hydrogen loading, heat treatment
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
    • G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
    • G02B6/0208—Refractive index modulation gratings, e.g. Bragg gratings characterised by their structure, wavelength response
    • G02B6/02085—Refractive index modulation gratings, e.g. Bragg gratings characterised by their structure, wavelength response characterised by the grating profile, e.g. chirped, apodised, tilted, helical
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
    • G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
    • G02B6/0208—Refractive index modulation gratings, e.g. Bragg gratings characterised by their structure, wavelength response
    • G02B6/021—Refractive index modulation gratings, e.g. Bragg gratings characterised by their structure, wavelength response characterised by the core or cladding or coating, e.g. materials, radial refractive index profiles, cladding shape
    • G02B6/02109—Refractive index modulation gratings, e.g. Bragg gratings characterised by their structure, wavelength response characterised by the core or cladding or coating, e.g. materials, radial refractive index profiles, cladding shape having polarization sensitive features, e.g. reduced photo-induced birefringence
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
    • G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
    • G02B6/02123—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating
    • G02B6/02152—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating involving moving the fibre or a manufacturing element, stretching of the fibre
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
    • G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
    • G02B6/02171—Refractive index modulation gratings, e.g. Bragg gratings characterised by means for compensating environmentally induced changes
    • G02B6/02176—Refractive index modulation gratings, e.g. Bragg gratings characterised by means for compensating environmentally induced changes due to temperature fluctuations
    • G02B6/0218—Refractive index modulation gratings, e.g. Bragg gratings characterised by means for compensating environmentally induced changes due to temperature fluctuations using mounting means, e.g. by using a combination of materials having different thermal expansion coefficients
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
    • G02B6/2821—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using lateral coupling between contiguous fibres to split or combine optical signals
    • G02B6/2835—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using lateral coupling between contiguous fibres to split or combine optical signals formed or shaped by thermal treatment, e.g. couplers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29331—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by evanescent wave coupling
    • G02B6/29332—Wavelength selective couplers, i.e. based on evanescent coupling between light guides, e.g. fused fibre couplers with transverse coupling between fibres having different propagation constant wavelength dependency
    • G02B6/29334—Grating-assisted evanescent light guide couplers, i.e. comprising grating at or functionally associated with the coupling region between the light guides, e.g. with a grating positioned where light fields overlap in the coupler

Definitions

  • This invention relates to optical wave propagation systems and devices
  • electro-opucal devices utilizing electro-opucal devices, and more particularly to grating assisted devices for filtering, coupling and other func ⁇ ons.
  • Typical optical fibers propagate waves by the use of the light confining and guiding properties of a central
  • the wave energy is
  • the wavelength selectivity is established by the
  • fibers is defined between pairs of tapered coupling sections at each end. At the waist,
  • the merged fibers are formed by elongation of an optical fiber precursor of generally conventional size and are so diametrically small that the central core effectively
  • the coupling is potentially non-evanescent in the presence of a coupling
  • a diffraction grating For example, a reflective grating written in
  • the waist region redirects only a selected wavelength of an input signal at the input
  • This reflection grating couples light
  • wavelength can be achieved, for example, by controlling the shape during elongation
  • the small diameter waist renders the coupler sensitive to diameter non-
  • the strength of the grating can be dramatically increased by in-diffusing a
  • grating modulated (a.c.) and uniform (d.c.) intensity UV beams Size and other characteristics of the waist region are selected such that the drop wavelength of the
  • wavelength lies outside the frequency band of interest.
  • the structure provides fine tuning so that the drop wavelength is precisely adjusted and subsequently maintained
  • Fig. 1 is a simplified and idealized view of the principal parts, namely
  • Fig. 2 is an enlarged cross sectional view of the asymmetric waist
  • Fig. 3 is a pair of graphs (A) and (B) illustrating the relationship
  • Fig. 4 is a simplified and idealized view of a coupler twisted at the waist region to impart polarization independence
  • Fig. 5 is a graphical representation of the drop channel spectral
  • Fig. 6 is an illustrative graph of (A) local Bragg wavelength variation
  • Fig. 7 is an illustrative graph (not to scale) of UV induced index of
  • Fig. 8 is a break-away perspective view of an exemplary coupler in
  • Fig. 9 is a side sectional view of the coupler of Fig. 8.
  • Fig. 10 is a fragmentary side sectional view of a fine tuning mechanism for compensation of wavelength within the coupler of Figs. 8 and 9;
  • Fig. 11 is a fragmentary side sectional view of an end portion of the
  • An optical fiber wavelength router in accordance with the invention is
  • a wavelength selective filter here of the type usually referred to as an
  • channels into a first optical fiber while transferring the remainder of the channels to a
  • add/drop filter is perhaps of greatest immediate benefit for multiplexers and demultiplexers in wavelength division multiplex (WDM) systems.
  • Figure 1 illustrates the physical structure of this device. The fused
  • coupler consists of a first fiber 31, 35 and a second fiber 30, 34 dissimilar in the vicinity of the coupling region 12 wherein an index of refraction grating 27 has been
  • the two fibers may be made dissimilar by locally pretapering one of them
  • grating 27 is impressed in the coupler waist 12, and if the wavelength is chosen such
  • grating typically reflects some light back into the original fibers at different
  • ⁇ i and ⁇ 2 correspond substantially to the LP 01 and LP ⁇ modes of an air-glass optical
  • the LPoi mode is a common representation of the HE u e , HE," modes, and the LPn mode is a common representation of the HE 21 , HE 1 ° X , EH , , and EH ⁇
  • the tilt angle of the transversely asymmetric grating can be
  • the number of supermodes supported by this composite waveguide structure is determined by the index profile and dimensions of the structure.
  • V number which decreases as the radius a of the waveguide
  • the core is decreased, and depends on the optical wavelength ⁇ 0 of the mode, the core
  • the first or lowest order mode is nominally LP ⁇ and the
  • second mode is nominally LPi ] .
  • higher order modes exist within the
  • N ⁇ V 2 12 which is 8 - 9 for a 4 micron diameter waist at 1550 nm.
  • the two lowest order modes are principally important in the add/drop operation. In general, a lossy peak appears for each higher order mode greater than two.
  • the two waveguides are sufficiently dissimilar and the tapered transition region is
  • optical energy passes from the input to the output without being disturbed.
  • a pair of identical fibers can be made dissimilar
  • a coupling region to redirect light at a particular wavelength from one fiber to another.
  • a 125 micron diameter fiber is pretapered by 25%, then elongated and
  • the wavelength of the drop channel of representative devices is in the 1550
  • a suitable starting fiber from which such a coupler may be fabricated is
  • present invention is to dope a significant volume fraction of the cladding.
  • the dopant e.g., Ge
  • the fiber be doped in a manner that minimizes thermal stress and
  • WDM systems enable multiple wideband signals to be transmitted on a
  • add/drop filter also referred to as a coupler 10
  • a coupler has a narrow waist 12 formed by
  • the waist 12 which is in the range of 2-3
  • a merged region typically less than 10 microns in cross sectional dimension.
  • the waist region 12 is a hybrid dumbbell-ellipsoid in
  • dumbbell-ellipsoid (Fig. 2) is a shape having characteristics resembling a cross between a dumbbell shape and an ellipsoid. This shape also has a transverse
  • asymmetry best characterized as a "peanut” or “pear” shape.
  • the asymmetry is the
  • the waist region 12 is
  • the fibers extend outwardly in a divergent
  • taper is adiabatic and transitions from the small diameter waist region 12 to the much larger single mode optical fibers (not shown) which have diameters of the order of 90-
  • These fibers have metallized outer surfaces (not shown) suitable for
  • a Bragg grating 27 is recorded that is of selected periodicity suitable for the chosen drop wavelength
  • the grating planes are tilted (typically 3°-5°) with respect to the larger of the transverse
  • the first tapered coupling branch 21 into the waist region 12 is selectively filtered by the Bragg grating 27, which couples only the drop wavelength into the second tapered coupling branch 20 and the other fiber 30.
  • the modal relationships, dimensions and properties of the coupler are selected and modified such that a number of
  • reduced diameter waist sections 14, 15, derived from precursor fibers are doped to be
  • such an air-glass waveguide include a large numerical aperture and multimode waveguiding properties.
  • the radial extent of the field outside the fiber is represented
  • orthogonal optical modes completely occupy and overlap the internal volume of the
  • the coupling is "non-evanescent", since the modes completely overlap with the grating. Note that the optical mode originally associated with a particular fiber is not localized within that original fiber region in the coupler waist. The modes in the waist
  • the air-glass waveguiding property of the coupler waist leads to unique optical characteristics. First, all lossy cladding modes are eliminated. Unlike the
  • coupler waist has a new uniform cladding (air) that does not support secondary guiding.
  • the waist supports multiple optical modes, but their number decreases as the
  • (A) illustrates the odd modes
  • the bottom figure (B) illustrates the even modes.
  • the horizontal axis corresponds to the V number of the waveguide, and the vertical
  • the LPoi (linearly polarized) mode is equivalent to a
  • EDFA doped fiber amplifier
  • the grating assisted mode coupler reflects light at a particular
  • add/drop response leads to the desired wavelength routing of light from one fiber to
  • the backreflection wavelength should be either below 1530 nm or above 1565 nm, or lie at a wavelength between the active
  • the backreflection/drop wavelength splitting should be 18 nm
  • the add/drop coupler sufficiently narrow ( ⁇ 7 microns) such that the wavelength of the
  • This wavelength splitting is in excess of 15 nm for an elliptical cross section waist with a major axis of approximately 3.5 microns using a
  • coupler waist diameter becomes increasingly stringent as the waist diameter
  • the waist diameter is usually selected to be that diameter which
  • add drop filter has a backreflection peak on either the short (for pretapered fiber input)
  • this drop/backreflection wavelength splitting requirement is substantially relaxed to a splitting on the order of a WDM channel
  • wavelengths are already extracted from the fiber by the previous add/drops.
  • this waist diameter may be larger, reducing the diameter uniformity
  • Optical fields are vectorial in nature; that is, they have direction. This
  • the polarization of an optical signal may be linear, circular, elliptical, or unpolarized.
  • Two linearly polarized optical signals are othogonally polarized if the electric field vectors lie
  • the LPoi and LPn modes can be
  • the grating assisted mode coupler can readily exhibit a polarization
  • the polarization dependence vanishes i.e., l ⁇ LPo ⁇ , x l +
  • Such a waist cross section is achieved when elongating a fused coupler under tension by heating it with a highly controlled and repeatable heat source that is varied in
  • waist cross sections have also been designed to eliminate polarization dependence but
  • the present add/drop filter has been fabricated in a manner that ensures that the polarization splitting of the add/drop wavelength is less than 0.05
  • gratings of FWHM bandwidth a few times the polarization splitting, or about 0.2 nm.
  • optical transmission spectra are then independent of the polarization of the input
  • UV grating writing conditions e.g., polarization and intensity
  • polarization e.g., polarization and intensity
  • the UV exposure process produces material birefringence within the glass that can compensate for the form birefringence of the coupler waist.
  • waist will have a broader spectral width than a grating of constant period within a
  • a highly uniform heat source such as a reciprocating
  • CO 2 laser or flame can be applied to give highly uniform coupler waists.
  • Apodized gratings are key to meeting the performance
  • Apodization is understood to have been achieved by several methods, including variable speed scanning, dithering of the phase mask and
  • An apodized grating can be written by spatially varying the modulation
  • Gaussian (exp-z ⁇ 2 ) apodization functions are all effective in reducing the grating
  • An apodized grating exhibits a longitudinally varying index of
  • the grating is gradually (over a large number of grating periods >1000) turned on and then off along the light propagation direction. This smoothly varying window function reduces the spectral ringing or sidebands resulting from
  • contrast of the optical interference pattern is varied as the grating is recorded while the
  • the waist region is simultaneously
  • the interference pattern is imprinted.
  • the sum of the intensities of the interference pattern and the uniform beam are kept constant, eliminating undesirable chirp arising from variations in the background index of refraction.
  • the intensity of the a.c. beam is:
  • I(.z) I 0 (sin k z + 1) cos 2 Ttz I L
  • the prepackage structure 54 is inside the housing 52 after
  • the prepackage structure 54 extends longitudinally along and within the housing 52, and centrally supports and retains the optical fiber coupler 53, in position
  • the opposite ends of the optical fiber coupler 50 are fixed to spaced apart brass end hubs 58, 59 on a pair of parallel invar rods 62,63
  • the hubs 58, 59 and rods 62, 63 are nickel plated
  • the prepackage structure is completed by interposition between the
  • the other base hub 66, on the second rod 63, is adjacent a reference hub 69 on the first end hub 58 side, also on the second rod 63.
  • subassembly comprises the first invar rod 62, the first end hub 58 and the second base
  • the other assembly comprises
  • optical coupler 53 extends along the approximate central axis
  • invar has a very low temperature coefficient, it alone cannot
  • the prepackage requirements are that the separation between the end hubs 58, 59 decreases as temperature is increased. This decreases the tension and
  • base hubs 66, 67 include aligned longitudinal grooves 72,
  • Each base hub 66, 67 is coupled to a different invar rod 62 or 63 respectively but has a
  • the unit can be inserted into a
  • screw 75 is threaded inwardly or outwardly relative to the reference hub 69.
  • the screw has a first short thread 76 mating in
  • the screw engagement point with reference hub 69 can be shifted longitudinally, increasing or decreasing the length of one invar segment and increasing or decreasing the length of the stainless steel
  • the prepackage 54 is fixed in position relative to the housing 52 simply
  • central bores 83 providing openings for the fibers are engaged into the housing 52 open ends, and soldered or welded into place.
  • the exit points are soldered to the end cages 82, 83 to produce hermetic seals.
  • the housing 52 is filled with an inert gas before the housing
  • the coupler should be hermetically packaged. The presence of water within the package can lead to coupler failure. This problem is
  • the coupler is
  • a device similarly packaged can be rendered tunable by the addition of
  • first fiber will be routed to a second fiber. If the drop wavelength of one of the filters
  • a light signal can be switched from one fiber to another.
  • One mechanism to instantaneously de-tune an add/drop filter is to launch a high intensity
  • the index of refraction of the waist can change almost instantaneously (on the order of
  • silica glass used in the manufacture of optical fibers Since silica glass used in the manufacture of optical fibers
  • optical materials such as specially doped silica, electrically poled silica, crystalline or polymer materials are promising candidates for this
  • Another mechanism to switch an add/drop filter is to surround the
  • coupler waist by a gas, liquid, or other substance whose optical properties can be
  • example is a liquid crystal, whose index of refraction varies upon application of an electric field.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

L'invention concerne un filtre d'insertion-extraction (10) d'énergie d'ondes optiques comprenant un réseau de Bragg (27) dans une région de ceinture très étroite (12) définie par des longueurs combinées de fibres optiques allongées (30, 31, 34, 35). De la lumière est propagée dans la région de ceinture via des fibres à transition progressive adiabatique (20, 21, 24, 25), cette lumière étant transformée à partir de deux fibres longitudinalement contiguës en deux modes orthogonaux dans le guide d'ondes air-verre de la ceinture, puis réfléchie hors du réseau de diffraction d'une fibre dans l'autre. La géométrie de la région de ceinture (12) est telle que la longueur d'onde d'extraction réfléchie est indépendante d'une polarisation, sans crêtes à pertes dans la bande de longueur d'onde intéressante. Des signaux de fond sont extraits par décalage de la bande de longueur d'onde intéressante. Des réseaux de diffraction haute résistance sont écrits par photosensibilisation des fibres de la région de ceinture. Des réseaux de diffraction à largeur de bande de spectre étroite sont apodisés par des variations ca et cc dans des faisceaux de lecture. Un dispositif de couplage faisant appel à ces derniers est précisément monté dans une structure de support produisant une compensation de température.
PCT/US1998/015328 1997-08-04 1998-08-04 Dispositifs de couplage par reseau de diffraction WO1999006864A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2000505537A JP2001512244A (ja) 1997-08-04 1998-08-04 格子利用型カプラデバイス
AU86618/98A AU738851B2 (en) 1997-08-04 1998-08-04 Grating assisted coupler devices
EP98937997A EP1002248A1 (fr) 1997-08-04 1998-08-04 Dispositifs de couplage par reseau de diffraction
CA002296345A CA2296345A1 (fr) 1997-08-04 1998-08-04 Dispositifs de couplage par reseau de diffraction

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US5515797P 1997-08-04 1997-08-04
US60/055,157 1997-08-04

Publications (1)

Publication Number Publication Date
WO1999006864A1 true WO1999006864A1 (fr) 1999-02-11

Family

ID=21995999

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/015328 WO1999006864A1 (fr) 1997-08-04 1998-08-04 Dispositifs de couplage par reseau de diffraction

Country Status (5)

Country Link
EP (1) EP1002248A1 (fr)
JP (1) JP2001512244A (fr)
AU (1) AU738851B2 (fr)
CA (1) CA2296345A1 (fr)
WO (1) WO1999006864A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001020377A1 (fr) * 1999-09-10 2001-03-22 Siemens Aktiengesellschaft Procede pour produire un reseau optique sur un guide d'onde optique
EP1099125A4 (fr) * 1999-05-25 2004-04-14 Alcoa Fujikura Ltd Procede permettant de produire des coupleurs a fibre optique realises par fusion et effilage comprenant des zones de gaine photosensibles
DE10036972B4 (de) * 1999-07-28 2004-07-08 Samsung Electronics Co., Ltd., Suwon Verfahren zur Herstellung von Langperiodenlichtleitergittern mit geringer Polarisationsabhängigkeit
EP1203253A4 (fr) * 1999-07-09 2005-05-04 Corning Inc Procede et dispositif permettant d'ajuster la longueur du trajet optique de composants a fibres optiques
CN111106531A (zh) * 2019-12-20 2020-05-05 中国电子科技集团公司第五十五研究所 一种硅基纳米级弯曲切趾光栅的制备方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109828331A (zh) * 2019-03-27 2019-05-31 浙江大学 一种波长锁定器及波长可调激光器

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5459801A (en) * 1993-10-29 1995-10-17 Rutgers University Coupler used to fabricate add-drop devices, dispersion compensators, amplifiers, oscillators, superluminescent devices, and communications systems

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5459801A (en) * 1993-10-29 1995-10-17 Rutgers University Coupler used to fabricate add-drop devices, dispersion compensators, amplifiers, oscillators, superluminescent devices, and communications systems
US5574807A (en) * 1993-10-29 1996-11-12 Rutgers University Coupler used to fabricate add-drop devices, dispersion compensators, amplifiers, oscillators, superluminescent devices, and communications systems

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1099125A4 (fr) * 1999-05-25 2004-04-14 Alcoa Fujikura Ltd Procede permettant de produire des coupleurs a fibre optique realises par fusion et effilage comprenant des zones de gaine photosensibles
EP1203253A4 (fr) * 1999-07-09 2005-05-04 Corning Inc Procede et dispositif permettant d'ajuster la longueur du trajet optique de composants a fibres optiques
DE10036972B4 (de) * 1999-07-28 2004-07-08 Samsung Electronics Co., Ltd., Suwon Verfahren zur Herstellung von Langperiodenlichtleitergittern mit geringer Polarisationsabhängigkeit
WO2001020377A1 (fr) * 1999-09-10 2001-03-22 Siemens Aktiengesellschaft Procede pour produire un reseau optique sur un guide d'onde optique
JP2003509717A (ja) * 1999-09-10 2003-03-11 シーメンス アクチエンゲゼルシヤフト 光導波路に光グレーティングを製作するための方法ならびにこのようなグレーティングとこのような光導波路とを備えた装置
CN111106531A (zh) * 2019-12-20 2020-05-05 中国电子科技集团公司第五十五研究所 一种硅基纳米级弯曲切趾光栅的制备方法

Also Published As

Publication number Publication date
AU8661898A (en) 1999-02-22
JP2001512244A (ja) 2001-08-21
EP1002248A1 (fr) 2000-05-24
CA2296345A1 (fr) 1999-02-11
AU738851B2 (en) 2001-09-27

Similar Documents

Publication Publication Date Title
US6236782B1 (en) Grating assisted coupler devices
US6169830B1 (en) Methods of fabricating grating assisted coupler devices
US6289699B1 (en) Wavelength selective optical couplers
CA1112489A (fr) Filtre reflecteur a fibre optique
US6826343B2 (en) Multi-core waveguide
KR20070062602A (ko) 가로방향 폐순환 공진기
US5457758A (en) Add-drop device for a wavelength division multiple, fiber optic transmission system
US20040131360A1 (en) Optical multiplexing device
EP1628148B1 (fr) Fibre optique insensible à la polarisation
US7457495B2 (en) Method of filtering optical signals with a capillary waveguide tunable optical device
US20030059195A1 (en) Optical devices using shaped optical fibers and methods for making optical devices with shaped optical fibers
WO1998059269A1 (fr) Filtre a bandes passantes multiples
AU738851B2 (en) Grating assisted coupler devices
US7409133B2 (en) Capillary waveguide tunable optical device
US20030147588A1 (en) Step-chirped, sampled optical waveguide gratings for WDM channel operations and method of manufacture therefor
US20040081383A1 (en) Tunable polarizers
US20070019313A1 (en) Method for production of a tunable optical filter
EP1243949A1 (fr) Dispositif à filtre optique, méthode d'accordage et système de communication
Bona Integrated optical planar waveguide components
KR100499734B1 (ko) 단심 및 다심에서 사용 가능한 고정 또는 가변형 광 감쇠기 제작 방법 및 이를 이용하여 제작한 광 감쇠기
Zou et al. Polymer Bragg gratings for telecom applications
CN114624818A (zh) 光纤光栅装置以及传感设备

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH GM HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG UZ VN YU ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
ENP Entry into the national phase

Ref document number: 2296345

Country of ref document: CA

Ref country code: CA

Ref document number: 2296345

Kind code of ref document: A

Format of ref document f/p: F

NENP Non-entry into the national phase

Ref country code: KR

WWE Wipo information: entry into national phase

Ref document number: 86618/98

Country of ref document: AU

WWE Wipo information: entry into national phase

Ref document number: 1998937997

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1998937997

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

WWG Wipo information: grant in national office

Ref document number: 86618/98

Country of ref document: AU

WWW Wipo information: withdrawn in national office

Ref document number: 1998937997

Country of ref document: EP

点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载