基于空分复用技术寻址的光纤水听器阵列。

Spatial-division-multiplexing addressed fiber laser hydrophone array.

机构信息

Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China.

出版信息

Opt Lett. 2013 Jun 1;38(11):1909-11. doi: 10.1364/OL.38.001909.

DOI:10.1364/OL.38.001909

PMID:23722786

Abstract

The fiber laser hydrophone is compact, and it is easy to construct an array by using the multiplexing technique. However, the number of hydrophones multiplexed in the array through wavelength-division-multiplexing (WDM) technology is limited. In order to expand the array, a spatial division multiplexing (SDM) method for addressing a fiber laser hydrophone array is researched. An optical switch is used in such array, and four distributed feedback (DFB) fiber laser hydrophones are addressed by switch channels. Experimental results show that the switch channels' crosstalk crucially influences the hydrophone signals' signal-to-noise ratio (SNR). In order to get good SNR, the crosstalk of the switch channels should be lower than -20 dB. Each DFB laser in the SDM-addressed array may be replaced with a WDM-addressed array, so a DFB fiber laser hydrophone array with more than 64 elements can be constructed.

摘要

光纤水听器体积小巧，并且易于使用复用技术构建阵列。然而，通过波分复用（WDM）技术在阵列中复用的水听器数量有限。为了扩展阵列，研究了一种用于寻址光纤激光水听器阵列的空间复用（SDM）方法。该阵列中使用了光开关，通过开关通道寻址四个分布式反馈（DFB）光纤激光水听器。实验结果表明，开关通道的串扰对水听器信号的信噪比（SNR）有至关重要的影响。为了获得良好的 SNR，开关通道的串扰应低于-20dB。SDM 寻址阵列中的每个 DFB 激光都可以用 WDM 寻址阵列代替，因此可以构建具有超过 64 个元件的 DFB 光纤激光水听器阵列。