A superfluorescent fiber source with high mean wavelength stability

CHEN Yizhu; ZHANG Haitao; GONG Mali; WANG Dongsheng; YAN Ping

doi:10.7510/jgjs.issn.1001-3806.2014.01.015

Interferometric fiber-optic gyroscopes require the optical sources should have high output power, broad bandwidth, as well as good mean wavelength stability within a large temperature range. To meet the temperature demands from -45℃ to 70℃, a bandpass filter as well as a Faraday rotation mirror was incorporated in the double-pass backward Er-doped superfluorescent fiber source, which, together with the optimization of the performance of fiber and other optical components in such a large temperature range, improved the output mean wavelength of the superfluorescent fiber source a lot. The effects of filters with different central wavelengths and bandwidths, as well as fiber length on mean wavelength stability and output bandwidth were modeled. Based on the simulation result about bandpass filters and fiber length, after optimizing the whole superfluorescent fiber source, the output power reached 32mW; the output bandwidth was 12.5nm. From -45℃ to 70℃, the mean wavelength variation of the superfluorescent fiber source was controlled to 23.5×10-6, and the output power variation was 0.65%. According to the investigation, among all superfluorescent fiber sources with mean wavelength stability lower than 0.5×10-6/℃, the 32mW output power is pretty high; the thermal coefficient of 0.2×10-6/℃ is also an excellent result reported for a whole superfluorescent fiber source with output power above 30mW in the 115℃ temperature range, which satisfies the demands of interferometric fiber-optic gyroscopes.

A superfluorescent fiber source with high mean wavelength stability

Corresponding author: ZHANG Haitao, zhanghaitao@mail.tsinghua.edu.cn;

1. Department of Precision Instrument, Tsinghua University, Beijing 100084, China

Received Date: 2013-04-07

Accepted Date: 2013-04-25

Available Online: 2014-01-25

Abstract: Interferometric fiber-optic gyroscopes require the optical sources should have high output power, broad bandwidth, as well as good mean wavelength stability within a large temperature range. To meet the temperature demands from -45℃ to 70℃, a bandpass filter as well as a Faraday rotation mirror was incorporated in the double-pass backward Er-doped superfluorescent fiber source, which, together with the optimization of the performance of fiber and other optical components in such a large temperature range, improved the output mean wavelength of the superfluorescent fiber source a lot. The effects of filters with different central wavelengths and bandwidths, as well as fiber length on mean wavelength stability and output bandwidth were modeled. Based on the simulation result about bandpass filters and fiber length, after optimizing the whole superfluorescent fiber source, the output power reached 32mW; the output bandwidth was 12.5nm. From -45℃ to 70℃, the mean wavelength variation of the superfluorescent fiber source was controlled to 23.5×10-6, and the output power variation was 0.65%. According to the investigation, among all superfluorescent fiber sources with mean wavelength stability lower than 0.5×10-6/℃, the 32mW output power is pretty high; the thermal coefficient of 0.2×10-6/℃ is also an excellent result reported for a whole superfluorescent fiber source with output power above 30mW in the 115℃ temperature range, which satisfies the demands of interferometric fiber-optic gyroscopes.

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Reference (14)

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A superfluorescent fiber source with high mean wavelength stability

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