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Indexed by:期刊论文

Date of Publication:2016-08-15

Journal:IEEE PHOTONICS TECHNOLOGY LETTERS

Included Journals:SCIE、EI、Scopus

Volume:28

Issue:16

Page Number:1723-1726

ISSN No.:1041-1135

Key Words:Fiber ring laser; displacement sensor; single-mode fiber

Abstract:We reported an erbium-doped fiber ring laser (FRL) displacement sensor based on a single-mode fiber (SMF) loop tied into the laser cavity. The proposed fiber loop structure acts as the sensing head as well as the filter of the FRL. A good linear relationship is obtained both in principle and in experiments between the displacement of one end of the loop and the central wavelength of the proposed FRL. The average sensitivity of this sensor reaches 227.5 pm/mm in the displacement range of 0-30 mm. High optical signal-to-noise ratio (similar to 52 dB) and narrow 3-dB bandwidth (<0.7 nm) are also achieved due to the FRL structure. Moreover, the macrofiber loop, as the key sensor head of the proposed sensing system, is tied with simple SMF without removing the coating, which has obvious advantages of firm structure with a wide range of displacement measurement and easy fabrication with low-cost SMF.