Novel method for measurement of effective cavity length of DBR fiber

Qing Ji; Xiurong Ma; Jing Sun; Hao Zhang; Ying Yao

doi:10.3788/COL20100804.0398

Chinese Optics Letters, Volume. 8, Issue 4, 398(2010)

Novel method for measurement of effective cavity length of DBR fiber

Qing Ji^1,2, Xiurong Ma^1,2, Jing Sun^1,2, Hao Zhang³, and Ying Yao^1,2

¹School of Computer and Communication Engineering, Tianjin University of Technology, Engineering Research Center of Communication Devices, Ministry of Education, Tianjin 300384, China

²Tianjin Key Laboratory of Film Electronic and Communication Devices, Tianjin University of Technology, Tianjin 300384, China

³Institute of Modern Optics, Nankai University, Tianjin 300071, China

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A novel method to measure the effective cavity length of distributed Bragg reflector (DBR) fiber laser with fiber Bragg grating (FBG) Fabry-Perot cavity as the resonator is proposed. The effective cavity length of DBR fiber laser is accurately measured by measuring the frequency spacing of two adjacent longitudinal modes in the cavity without the precise physical length of FBGs. The measuring accuracy as high as 10<sup>-5</sup> mm can be obtained by setting the resolution bandwidth of the spectrum analyzer.

Keywords

140.3510 140.4780

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Qing Ji, Xiurong Ma, Jing Sun, Hao Zhang, Ying Yao. Novel method for measurement of effective cavity length of DBR fiber[J]. Chinese Optics Letters, 2010, 8(4): 398

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Paper Information

Received: Jul. 22, 2009

Accepted: --

Published Online: Apr. 20, 2010

The Author Email:

DOI:10.3788/COL20100804.0398

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology