Vernier effect of fiber interferometer based on cascaded PANDA polarization maintaining fiber

Shun Liu; Ping Lu; Enci Chen; Wenjun Ni; Deming Liu; Jiangshan Zhang; Zhenggang Lian

doi:10.3788/COL201917.080601

Journals >Chinese Optics Letters >Volume 17 >Issue 8 >Page 080601 > Article

Chinese Optics Letters
Vol. 17, Issue 8, 080601 (2019)

Vernier effect of fiber interferometer based on cascaded PANDA polarization maintaining fiber

Shun Liu¹, Ping Lu^1、*, Enci Chen¹, Wenjun Ni¹, Deming Liu¹, Jiangshan Zhang², and Zhenggang Lian³

Author Affiliations

¹School of Optical and Electronic Information, National Engineering Laboratory for Next Generation Internet Access System, Huazhong University of Science and Technology, Wuhan 430074, China

²Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

³Yangtze Optics Electronics Co., Wuhan 430074, China

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DOI: 10.3788/COL201917.080601 Cite this Article Set citation alerts

Shun Liu, Ping Lu, Enci Chen, Wenjun Ni, Deming Liu, Jiangshan Zhang, Zhenggang Lian. Vernier effect of fiber interferometer based on cascaded PANDA polarization maintaining fiber[J]. Chinese Optics Letters, 2019, 17(8): 080601 Copy Citation Text

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Abstract

This Letter shows the Vernier effect based on two segments of PANDA polarization maintaining fiber (PMF), whose lengths are 28 and 23 cm, respectively. The two PMFs are spliced together, and the angle between the fast axes is set to 45°. This cascaded PMF is inserted in a Sagnac loop to form an interferometer that can generate the Vernier effect. The spectrum consists of finesse fringe and envelope and realizes simultaneous measurement of strain and temperature. The envelope can provide strain and temperature sensitivities of 58.0 pm/με and 1.05 nm/°C. The finesse fringe provides sensitivities of 5.9 pm/με and 1.36 nm/°C.

(\begin{matrix} E_{out x} \\ E_{out y} \end{matrix}) = [R (β) M_{CW} R (α) - R (- α) M_{CCW} R (- β)] (\begin{matrix} E_{in x} \\ E_{in y} \end{matrix}) .

(1)