Design of encapsulated structure of distributed feedback fiber laser hydrophone

TAN Bo; HUANG Jun-bin

doi:10.3788/OPE.20122008.1691

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Design of encapsulated structure of distributed feedback fiber laser hydrophone

更新时间：2020-08-12

- Design of encapsulated structure of distributed feedback fiber laser hydrophone
- Optics and Precision Engineering Vol. 20, Issue 8, Pages: 1691-1695(2012)
- 作者机构：
  
  海军工程大学兵器工程系,湖北武汉,430033
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20122008.1691
  CLC： TP212.14;TN253
- Received：23 December 2011，
  
  Revised：07 February 2012，
  
  Published：10 August 2012
- 稿件说明：
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谭波, 黄俊斌. 分布反馈光纤激光水听器封装结构的设计[J]. 光学精密工程, 2012,(8): 1691-1695

TAN Bo, HUANG Jun-bin. Design of encapsulated structure of distributed feedback fiber laser hydrophone[J]. Editorial Office of Optics and Precision Engineering, 2012,(8): 1691-1695
谭波, 黄俊斌. 分布反馈光纤激光水听器封装结构的设计[J]. 光学精密工程, 2012,(8): 1691-1695 DOI： 10.3788/OPE.20122008.1691.

TAN Bo, HUANG Jun-bin. Design of encapsulated structure of distributed feedback fiber laser hydrophone[J]. Editorial Office of Optics and Precision Engineering, 2012,(8): 1691-1695 DOI： 10.3788/OPE.20122008.1691.

摘要

针对分布反馈式(DFB)光纤激光器用于水声探测时频响曲线起伏较大的问题

设计了一种开孔套管式封装结构。通过对DFB激光器的封装

使其张紧后被聚氨酯固定于开孔套筒的中心轴线上

利用开孔套管的保护作用以及施加于光纤激光器两端的拉力来抑制水声探测过程中频响曲线的起伏。基于有限元软件ANSYS对封装结构的动态特性进行了数值仿真计算

然后加工制作了开孔套管结构封装的DFB光纤激光水听器原型样品

并利用振动液柱法进行了测试。试验结果显示

DFB光纤激光水听器在20~800 Hz的声压灵敏度达到-131 dB左右

灵敏度起伏不高于±1.5 dB

表明通过该封装结构的保护及聚氨酯的张紧作用

有效抑制了频响曲线的起伏

改善了DFB光纤激光水听器的水声探测性能。

Abstract

To reduce the fluctuation of frequency response of a Distributed Feedback (DFB) fiber laser used in underwater sound detection

an encapsulated structure with orifices was designed.With the encapsulated structure

both ends of the DFB fiber laser were fixed along the axes of the structure by the tension of polyurethane

and the fluctuation of mid-frequency response was restrained. The dynamics of the encapsulated structure was numerically analyzed with ANSYS

and a prototype of the new kind of hydrophone based on the structure was produced and tested with the vibration fluid column method. The results show that the fluctuation of frequency response of the DFB fiber laser is restrained effectively from 20 Hz to 800 Hz

and the acoustic pressure sensitivity reaches to -131 dB with the fluctuation less than ?1.5 dB. These results demonstrate that the performance of the DFB fiber laser hydrophone has been improved by the protection of the encapsulated structure and the tension of polyurethane.

关键词

Keywords

references

SIGURD W L, KJELL B, JON T K. Contributions to wavelength shifts of DFB fiber lasers used as acoustic sensors in air[J]. SPIE, 1998,3483:69-73.

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TIKBOMIROV A, FOSTER S, MILNES M, et al.. Acoustic and vibrational response of a DFB fibre laser sensor . Proceedings of COIN/ACOFT 2003 Conference, Melbourne, Australia: COIN/ACOFT, 2003.

SHAO L Y, LAU S T,DONG X Y, et al.. High-frequency ultrasonic hydrophone based on a cladding-etched DBR fiber laser[J]. IEEE Photonics Technology Letters, 2008,20(8):548-550.

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HAO Q Q,CHAI Q,LI X L, et al.. Hydrophone based on the feedback effect of composite cavity optical fiber laser[J]. SPIE, 2010, 7847:78471Q-78471Q-5.

LI X L,CHAI Q,ZHANG J ZH, et al.. DFB fiber laser hydrophone based on a intensity demodulation[J]. SPIE, 2010,7847:78471F-78471F-5.

AZMI A L,SEN D,PEN G D. Sensitivity enhancement in composite cavity fiber laser hydrophone[J]. Journal of Lightwave Technology, 2010,28(12):1844-1850.

谭波,黄俊斌,何琳,等. 分布反馈式光纤激光器的动态特性[J]. 光学精密工程,2009,17(8):1832-1838. TAN B, HUANG J B, HE L, et al.. A study on the dynamical characteristics of distributed feedback fiber laser[J]. Opt. Precision Eng., 2009,17(8):1832-1838. (in Chinese)

谭波,黄俊斌,李日忠,等. 对基于光纤光栅的两种水听器灵敏度的讨论[J]. 应用声学,2008,27(3):227-233. TAN B, HUANG J B, LI R ZH, et al.. Discussion on the sensitivities of two kinds of hydrophones based on fiber grating[J]. Applied Acoustics, 2008,27(3):227-233. (in Chinese)

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