MY165534A - All fiber based diaphragm-less optical microphone - Google Patents

All fiber based diaphragm-less optical microphone

Info

Publication number
MY165534A
MY165534A MYPI2013003189A MYPI2013003189A MY165534A MY 165534 A MY165534 A MY 165534A MY PI2013003189 A MYPI2013003189 A MY PI2013003189A MY PI2013003189 A MYPI2013003189 A MY PI2013003189A MY 165534 A MY165534 A MY 165534A
Authority
MY
Malaysia
Prior art keywords
fibre
smf
optical microphone
channels
jacket
Prior art date
Application number
MYPI2013003189A
Inventor
Pua Chang Hong Dr
Original Assignee
Univ Malaya
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 Univ Malaya filed Critical Univ Malaya
Priority to MYPI2013003189A priority Critical patent/MY165534A/en
Priority to PCT/MY2014/000205 priority patent/WO2015030569A1/en
Publication of MY165534A publication Critical patent/MY165534A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
    • 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
    • H04R2410/00—Microphones

Abstract

AN ALL FIBRE BASED OPTICAL MICROPHONE WITH DUAL WAVELENGTH FIBRE LASER AND FIBRE LASER DYNAMICS OPERATING PRINCIPLES IS FABRICATED ACCORDING TO THE PRESENT INVENTION TO SETTLE THE DIFFICULTY OF SOUND SENSING USING OPTICAL FIBRE WITHOUT ANY INTERMEDIATE OR DIAPHRAGM. THE OPTICAL MICROPHONE DEVELOPED ACCORDING TO THE PRESENT INVENTION CONSISTS OF A SINGLE MODE FIBRE (SMF), A 980 NM LASER DIODE, A WAVELENGTH DIVISION MULTIPLEXER (WDM), A SINGLE CHANNEL SMF OUTPUT, AN ERBIUM DOPED FIBRE (EDF), A 1 X 16 ARRAYED WAVEGUIDE GRATINGS (AWG) WITH 16 CHANNELS (SMF) OUTPUT (WITH JACKET) AND 2 CHANNELS SMF (WITHOUT JACKET) CONNECTED TO THE CHOSEN CHANNELS AS ACOUSTIC WAVES SENSING ELEMENT. THE OPTICAL MICROPHONE CAN BE USED UNDER HARSH ENVIRONMENT SUCH AS HIGH ELECTROMAGNETIC INTERFERENCE ESPECIALLY FOR MEDICAL INSTRUMENTS LIKE MAGNETIC RESONANCE IMAGING (MRI) AND ABLE TO BEND INTO ANY SENSOR SHAPE TO FIT IN TO ANY POSITION. THE OPTICAL MICROPHONE ALSO CAN BE USED AS HYDROPHONE AS IT FUNCTIONS NORMALLY EVEN UNDER WATER.
MYPI2013003189A 2013-08-30 2013-08-30 All fiber based diaphragm-less optical microphone MY165534A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
MYPI2013003189A MY165534A (en) 2013-08-30 2013-08-30 All fiber based diaphragm-less optical microphone
PCT/MY2014/000205 WO2015030569A1 (en) 2013-08-30 2014-06-27 All fibre based diaphragm-less optical microphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
MYPI2013003189A MY165534A (en) 2013-08-30 2013-08-30 All fiber based diaphragm-less optical microphone

Publications (1)

Publication Number Publication Date
MY165534A true MY165534A (en) 2018-04-02

Family

ID=52587011

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI2013003189A MY165534A (en) 2013-08-30 2013-08-30 All fiber based diaphragm-less optical microphone

Country Status (2)

Country Link
MY (1) MY165534A (en)
WO (1) WO2015030569A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112161931B (en) * 2020-09-04 2022-02-15 大连理工大学 High-sensitivity optical fiber photoacoustic gas detection system and method
WO2022186783A1 (en) 2021-03-05 2022-09-09 Univerza V Ljubljani A fast and highly sensitive reflective fiber-optic hydrophone

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9026588D0 (en) * 1990-12-06 1991-04-24 Marconi Gec Ltd Improvements relating to optical sensing systems
JPH0964819A (en) * 1995-08-23 1997-03-07 Fujitsu Ltd Optical system
US8015878B2 (en) * 2006-10-05 2011-09-13 Delaware State University Foundation, Inc. Fiber optics sound detector

Also Published As

Publication number Publication date
WO2015030569A1 (en) 2015-03-05

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