Switchable multiwavelength thulium-doped fiber ring lasers

Shui Zhao; Ping Lu; Deming Liu; Jiangshan Zhang

doi:10.1117/1.OE.52.8.086105

7 August 2013 Switchable multiwavelength thulium-doped fiber ring lasers

Shui Zhao, Ping Lu, Deming Liu, Jiangshan Zhang

Author Affiliations +

Optical Engineering, Vol. 52, Issue 8, 086105 (August 2013). https://doi.org/10.1117/1.OE.52.8.086105

Abstract

Two kinds of thulium-doped fiber ring lasers based on a spatial mode beating filter and comb filtering effect are presented and experimentally demonstrated, which all show multiwavelength laser spectrum around 2 μm. In the implementation of the first type of experiment configuration by the use of a piece of multimode fiber (MMF) as a spatial mode beating filter, dual-,triple-, and quadruple-wavelengths appeared whose extinction noise ratio is 25 dB by adjusting the angle of polarization controller. Different wavelength spaces are obtained by inserting different lengths of MMF. The second type is achieved by inserting a Sagnac loop mirror, which was constructed by a 3-dB coupler and a piece of polarization maintaining fiber. Seven stable wavelengths with channel spacing of 0.65 nm and an extinction ratio of 35 dB was achieved. These systems are simple and easy to construct, which can be useful for 2 μm wavelength-division-multiplexed applications.

Citation Download Citation

Shui Zhao, Ping Lu, Deming Liu, and Jiangshan Zhang "Switchable multiwavelength thulium-doped fiber ring lasers," Optical Engineering 52(8), 086105 (7 August 2013). https://doi.org/10.1117/1.OE.52.8.086105

Published: 7 August 2013

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