Duplex self-mixing interference based on ultra-narrow linewidth fiber ring laser

A novel duplex self-mixing interference based on ultra-narrow linewidth fiber ring laser is investigated. Dense Wavelength Division Multiplexing (DWDM) is applied to add-drop the dual-channel vibration signal into the fiber laser. Meanwhile, the output power with optical feedback is theoretically de...

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Bibliographic Details
Published in:Optics communications 2014-08, Vol.325, p.60-67
Main Authors: Du, Zhengting, Lu, Liang, Wu, Shuang, Zhang, Wenhua, Yang, Bo, Xiang, Rong, Cao, Zhigang, Gui, Huaqiao, Liu, Jianguo, Yu, Benli
Format: Article
Language:English
Subjects:
Channels
Fiber laser
Fiber lasers
Fibers
Interference
Laser sensor
Movements
Optical feedback
Ring lasers
Self-mixing
Vibration
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Summary:A novel duplex self-mixing interference based on ultra-narrow linewidth fiber ring laser is investigated. Dense Wavelength Division Multiplexing (DWDM) is applied to add-drop the dual-channel vibration signal into the fiber laser. Meanwhile, the output power with optical feedback is theoretically deduced which can not only be interpreted by the well known expression of self-mixing interference but the combination of self-mixing interference and mode competition. Experimental results show that different movements of each channel detected from the dual-channel fiber laser self-mixing interference system are in good agreement with theoretical analysis. Furthermore, a novel system measuring 2-dimensional vibration is introduced in this paper and its potential application to self-mixing interference measurement system for high sensitivity, remote and multi-dimensional measurement is shown.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2014.03.070