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Title: Fiber laser microphones with graphene diaphragms

Abstract

An acoustic sensor comprises a sensing head comprising an optical fiber having a tip. A graphene diaphragm is disposed on the tip and is configured to vibrate in response to an acoustic signal. A fiber laser is optically coupled to the sensing head. The fiber laser comprises a first set of fiber Bragg gratings and a second set of fiber Bragg gratings. A gap is present between the first set and the second set of fiber Bragg gratings. The fiber laser is configured to generate a sensing optical signal having a first intensity in response to an excitation optical signal, the sensing optical signal impinging on the graphene diaphragm such that a feedback optical signal is reflected from the graphene diaphragm towards the fiber laser and has and has a second intensity modulated by the vibration of the graphene diaphragm that corresponds to the acoustic signal.

Inventors:
;
Issue Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1805619
Patent Number(s):
10945078
Application Number:
16/105,295
Assignee:
UChicago Argonne, LLC (Chicago, IL)
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Patent
Resource Relation:
Patent File Date: 08/20/2018
Country of Publication:
United States
Language:
English

Citation Formats

Liao, Shaolin, and Chien, Huan-Sheng. Fiber laser microphones with graphene diaphragms. United States: N. p., 2021. Web.
Liao, Shaolin, & Chien, Huan-Sheng. Fiber laser microphones with graphene diaphragms. United States.
Liao, Shaolin, and Chien, Huan-Sheng. Tue . "Fiber laser microphones with graphene diaphragms". United States. https://www.osti.gov/servlets/purl/1805619.
@article{osti_1805619,
title = {Fiber laser microphones with graphene diaphragms},
author = {Liao, Shaolin and Chien, Huan-Sheng},
abstractNote = {An acoustic sensor comprises a sensing head comprising an optical fiber having a tip. A graphene diaphragm is disposed on the tip and is configured to vibrate in response to an acoustic signal. A fiber laser is optically coupled to the sensing head. The fiber laser comprises a first set of fiber Bragg gratings and a second set of fiber Bragg gratings. A gap is present between the first set and the second set of fiber Bragg gratings. The fiber laser is configured to generate a sensing optical signal having a first intensity in response to an excitation optical signal, the sensing optical signal impinging on the graphene diaphragm such that a feedback optical signal is reflected from the graphene diaphragm towards the fiber laser and has and has a second intensity modulated by the vibration of the graphene diaphragm that corresponds to the acoustic signal.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2021},
month = {3}
}

Works referenced in this record:

Optical microphone with vibrating optical element
patent, November 1993


Microphone Diaphragm
patent-application, October 2016