WO2008100266A3 - Mems fiber optic microphone - Google Patents
Mems fiber optic microphone Download PDFInfo
- Publication number
- WO2008100266A3 WO2008100266A3 PCT/US2007/011954 US2007011954W WO2008100266A3 WO 2008100266 A3 WO2008100266 A3 WO 2008100266A3 US 2007011954 W US2007011954 W US 2007011954W WO 2008100266 A3 WO2008100266 A3 WO 2008100266A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- diaphragm
- fabry
- perot
- fiber optic
- mems
- Prior art date
Links
- 239000000835 fiber Substances 0.000 title abstract 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- 238000012512 characterization method Methods 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 238000013461 design Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 239000012528 membrane Substances 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
- 238000004806 packaging method and process Methods 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 230000003068 static effect Effects 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
- G01L9/0076—Transmitting or indicating the displacement of flexible diaphragms using photoelectric means
- G01L9/0077—Transmitting or indicating the displacement of flexible diaphragms using photoelectric means for measuring reflected light
- G01L9/0079—Transmitting or indicating the displacement of flexible diaphragms using photoelectric means for measuring reflected light with Fabry-Perot arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
- H04R23/008—Transducers other than those covered by groups H04R9/00 - H04R21/00 using optical signals for detecting or generating sound
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2410/00—Microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
- H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
- H04R31/006—Interconnection of transducer parts
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Spectrometry And Color Measurement (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
The theory, design, fabrication, and characterization of MEMS (micro electrical mechanical system) Fabry-Perot diaphragm-fiber optic microphone are described in the present invention. By using MEMS technology in processing and packaging, a square 1.9mm x 1.9mm, 2 μ thick SiO2 diaphragm with a 350 μ square embossed center of silicon is mechanically clamped to the ferrule of a single mode fiber to keep its closeness (5 μ) and perpendicular orientation with respect to the diaphragm. Static measurement of optical output power versus the pressure on membrane reveals more than one period of Fabry-Perot interference, thereby generating a Fabry-Perot diaphragm-fiber interferometer device accurately reproducing audible acoustic wave.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US80194306P | 2006-05-19 | 2006-05-19 | |
US80191006P | 2006-05-19 | 2006-05-19 | |
US60/801,910 | 2006-05-19 | ||
US60/801,943 | 2006-05-19 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2008100266A2 WO2008100266A2 (en) | 2008-08-21 |
WO2008100266A3 true WO2008100266A3 (en) | 2009-02-26 |
Family
ID=39690640
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2007/011954 WO2008100266A2 (en) | 2006-05-19 | 2007-05-18 | Mems fiber optic microphone |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO2008100266A2 (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4343657A (en) * | 1979-07-31 | 1982-08-10 | Fujitsu Limited | Process for producing a semiconductor device |
US4933545A (en) * | 1985-12-30 | 1990-06-12 | Metricor, Inc. | Optical pressure-sensing system using optical resonator cavity |
US6055080A (en) * | 1996-06-13 | 2000-04-25 | Deutsche Forschungsanstalt Fur Luft-Und Raumfahrt E.V. | Optical microphone |
US6351593B1 (en) * | 1998-11-30 | 2002-02-26 | Three E Laboratories, Inc. | Hermetically sealed connectors and feed-throughs for fiber optic cables and method for effecting hermetic seals for such cables |
US6628799B2 (en) * | 1997-11-19 | 2003-09-30 | Sakuji Fukuda | Loudspeaker system |
US20050157305A1 (en) * | 2002-10-15 | 2005-07-21 | Miao Yu | Micro-optical sensor system for pressure, acceleration, and pressure gradient measurements |
US6967362B2 (en) * | 2002-09-26 | 2005-11-22 | Samsung Electronics Co., Ltd. | Flexible MEMS transducer and manufacturing method thereof, and flexible MEMS wireless microphone |
-
2007
- 2007-05-18 WO PCT/US2007/011954 patent/WO2008100266A2/en active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4343657A (en) * | 1979-07-31 | 1982-08-10 | Fujitsu Limited | Process for producing a semiconductor device |
US4933545A (en) * | 1985-12-30 | 1990-06-12 | Metricor, Inc. | Optical pressure-sensing system using optical resonator cavity |
US6055080A (en) * | 1996-06-13 | 2000-04-25 | Deutsche Forschungsanstalt Fur Luft-Und Raumfahrt E.V. | Optical microphone |
US6628799B2 (en) * | 1997-11-19 | 2003-09-30 | Sakuji Fukuda | Loudspeaker system |
US6351593B1 (en) * | 1998-11-30 | 2002-02-26 | Three E Laboratories, Inc. | Hermetically sealed connectors and feed-throughs for fiber optic cables and method for effecting hermetic seals for such cables |
US6967362B2 (en) * | 2002-09-26 | 2005-11-22 | Samsung Electronics Co., Ltd. | Flexible MEMS transducer and manufacturing method thereof, and flexible MEMS wireless microphone |
US20050157305A1 (en) * | 2002-10-15 | 2005-07-21 | Miao Yu | Micro-optical sensor system for pressure, acceleration, and pressure gradient measurements |
Also Published As
Publication number | Publication date |
---|---|
WO2008100266A2 (en) | 2008-08-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Shah et al. | Design approaches of MEMS microphones for enhanced performance | |
CN103154682B (en) | Optical-fiber-compatible acoustic sensor | |
JP5317373B2 (en) | Improved photonic crystal structure sensor | |
US9479875B2 (en) | Multi-mode microphones | |
Jo et al. | Miniature fiber acoustic sensors using a photonic-crystal membrane | |
US7561277B2 (en) | MEMS fiber optic microphone | |
Wang et al. | Diaphragm design guidelines and an optical pressure sensor based on MEMS technique | |
US9503820B2 (en) | Multi-mode microphones | |
US8094519B2 (en) | Intensity modulated fiber optic hydrophones | |
US7894618B2 (en) | Apparatus comprising a directionality-enhanced acoustic sensor | |
US20160219375A1 (en) | Multi-mode Microphones | |
Liu et al. | A compact fiber optic Fabry–Pérot sensor for simultaneous measurement of acoustic and temperature | |
CN101808264A (en) | Optical fiber laser microphone | |
WO2007143362A3 (en) | Improved displacement sensor | |
Hunt et al. | Design and characterization of MEMS optical microphone for aeroacoustic measurement | |
Lorenzo et al. | Acoustic localization with an optical fiber silicon microphone system | |
CN101660939B (en) | Optical fiber sound pressure sensor | |
WO2008100266A3 (en) | Mems fiber optic microphone | |
Liu et al. | Ultrasensitive acoustic detection using an enlarged Fabry–Perot cavity with a graphene diaphragm | |
Wei et al. | A Mach-Zehnder Photonic MEMS Microphone with High Sensitivity, 1/F Noise Suppression, and Broadband Response | |
Zhang et al. | Biomimetic MEMS directional microphone structures for multi-band operation | |
Akkaya et al. | High-sensitivity thermally stable acoustic fiber sensor | |
Wang et al. | Micromachined fiber optic Fabry-Perot underwater acoustic probe | |
US20230314207A1 (en) | Self-aligning optical acoustic sensors | |
Wang et al. | Fiberoptic microphone using a polymeric cavity |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 07873301 Country of ref document: EP Kind code of ref document: A2 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 07873301 Country of ref document: EP Kind code of ref document: A2 |