Numerical Simulation and Characteristics Analysis of Saturable Absorber Grating in Fiber Ring Cavity Resonator

Pan, 徐攀 Xu; Zhengliang, 胡正良 Hu; Mingxiang, 马明祥 Ma; Nuan, 姜暖 Jiang; Yongming, 胡永明 Hu

doi:10.3788/aos201232.0814001

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“…Then they will interfere, and spatial hole burning effect is produced [8] , standing wave was formed. Then it can make un-pumped EDF absorption saturated and formed an ultra-narrow band filter [9] .…”

Section: Choosing Mode Principlementioning

confidence: 99%

Single Longitudinal Mode Fiber Laser Based on Saturated Absorber

Zhang

et al. 2014

AMR

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In order to realize single longitudinal mode (SLM) output, an erbium-doped fiber (EDF) laser with fiber ring cavity is proposed which uses an un-pumped EDF saturated absorber as a SLM selector. Ring cavity length, coupler ratio and insertion loss which affect ring cavity filter performance are analyzed theoretically and simulated numerically. Un-pumped EDF length and Er3+ concentration are analyzed theoretically and simulated. Research shows that, the bigger coupling output ratio of ring cavity, the greater transmission peak; the greater mode line width; the shorter ring cavity length, the wider free spectral range; the bigger coupling loss, the smaller transmission peak; when the difference between two cavities length is big, cursor effect is not obvious. Laser threshold increases with absorber length increasing; the bigger saturated absorber concentration, the higher laser threshold.

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Section: Choosing Mode Principlementioning

confidence: 99%