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Wide Pulse-Repetition-Rate Range Tunable Nanotube Q -Switched Low Threshold Erbium-Doped Fiber Laser

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4 Author(s)
Bo Dong ; RF & Opt. Dept., Inst. for Infocomm Res., Singapore, Singapore ; Jianzhong Hao ; Junhao Hu ; Chin-Yi Liaw

A novel all-fiber wide pulse-repetition-rate range tunable nanotube Q-switched low threshold erbium-doped fiber (EDF) laser is demonstrated. By connecting a compact and low insertion loss carbon nanotube-based saturable absorber and a section of high concentration EDF in a simple linear laser cavity, Q-switched laser, with a threshold of 29.85 mW, a pulse-repetition-rate tunable range of 14.5-141.4 kHz, and a minimum pulse duration of 330 ns, are achieved. With this laser structure, the self-mode-locking effect on the Q-switch operation can be effectively suppressed.

Published in:

Photonics Technology Letters, IEEE  (Volume:22 ,  Issue: 24 )