Comparison of the characteristics of double-pass erbium-doped superfluorescent fiber sources obtained from different flattening techniques
作者： Tsair-Chun Liang , Yun-Shi Lin , Yung-Kuang Chen
DOI: 10.1364/AO.38.000522
关键词: Band-stop filter 、 Ripple 、 Erbium 、 Laser linewidth 、 Fiber Bragg grating 、 Materials science 、 Optics 、 Fiber 、 Flattening 、 Fiber optic sensor
摘要: We investigate and compare the characteristics of erbium-doped superfluorescent fiber sources (SFS’s) obtained from use different flattening techniques in double-pass forward (DPF) backward (DPB) configurations. The intrinsic technique consists optimizing length fiber. extrinsic methods include addition a samarium-doped (SDF) fiber-Bragg-grating (FBG) notched filter at output end separately to shape SFS spectrum. Although intrinsically flattened DPF DPB SFS’s have large power >34 mW, they are accompanied by an ∼3-dB ripple. FBG-flattened can achieve wide linewidth 35 nm with small ripple ∼1.7 dB better pump-power-dependent mean-wavelength stability; SDF-flattened inferior because SDF’s lossy
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