Low noise GHz passive harmonic mode-locking of soliton fiber laser using evanescent wave interaction with carbon nanotubes

Passive harmonic mode-locking in soliton fiber laser is presented with excellent noise characteristics by employing a single-walled carbon nanotubes saturable absorber designed to interact with evanescent wave of the laser field. The 34(th) harmonic mode-locking pulses at 943.16 MHz repetition rate...

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Bibliographic Details
Published in:Optics express 2011-09, Vol.19 (20), p.19775-19780
Main Authors: Jun, Chang Su, Im, Ju Hee, Yoo, Sang Hwa, Choi, Sun Young, Rotermund, Fabian, Yeom, Dong-Il, Kim, Byoung Yoon
Format: Article
Language:English
Subjects:
Absorption
Equipment Design
Fiber Optic Technology
Lasers, Solid-State
Nanotechnology - instrumentation
Nanotubes, Carbon - chemistry
Spectrum Analysis - instrumentation
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Summary:Passive harmonic mode-locking in soliton fiber laser is presented with excellent noise characteristics by employing a single-walled carbon nanotubes saturable absorber designed to interact with evanescent wave of the laser field. The 34(th) harmonic mode-locking pulses at 943.16 MHz repetition rate were stably generated with 18 mW output power, >50 dB side-mode suppression and -140 dB/Hz relative intensity noise. Soliton energy control with polarization controller further increased the harmonic order to 61st, 1.692 GHz, but with compromised performance. Scaling to higher-order harmonic mode-locking is discussed for practical application in optical communication system.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.19.019775