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

Journals >Chinese Optics Letters >Volume 8 >Issue 4 >Page 398 > Article

Chinese Optics Letters
Vol. 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

Author Affiliations

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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DOI: 10.3788/COL20100804.0398 Cite this Article Set citation alerts

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 Copy Citation Text

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Abstract

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

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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