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Tunable Passively Q -switched Erbium-Doped Fiber Laser With Carbon Nanotubes as a Saturable Absorber

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4 Author(s)
Da-Peng Zhou ; Dept. of Phys. & Astron., Univ. of Waterloo, Waterloo, ON, Canada ; Li Wei ; Bo Dong ; Wing-Ki Liu

An all-fiber tunable passively Q-switched erbium-doped fiber (EDF) laser is presented. Saturable absorbers are constructed by optically driven deposition of single-wall carbon nanotubes on fiber connectors. A low pump threshold of 11.1 mW is achieved. Self-mode-locking effect is also observed, and it could be suppressed by splicing an extra unpumped EDF into the laser ring cavity. The laser can be tuned by applying axial strain on the fiber Bragg grating which serves as a narrowband external mirror of the cavity.

Published in:

Photonics Technology Letters, IEEE  (Volume:22 ,  Issue: 1 )