Multi-wavelength actively mode-locked fiber laser with a double-ring configuration and integrated cascaded sampled fiber Bragg gratings
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1.
Department of Information Engineering, Xiangtan Polytechnic College, Xiangtan 411101, China;
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2.
Photonies Research Centre, Nanyang Technological University, Singapore 639798 Singapore;
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3.
College of Physics, Xiangtan University, Xiangtan 411105, China
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Received Date:
2009-02-19
Accepted Date:
2009-03-16
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Abstract
In order to obtain laser at multiple wavelengths, a modified multi-wavelength actively mode-locked fiber ring laser was proposed and experimentally demonstrated. In this kind of laser, stable multi-wavelength lasing is achieved by integrating cascaded sampled fiber Bragg gratings(SFBGs) into the laser cavity.To implement actively mode-locking technique, a double-ring cavity configuration was used to assure that the cavity lengths for all wavelengths lasing are identical.Thus, simultaneous mode locking of all wavelengths was successfully achieved by using the same mode-locking signal.It was shown in our experiments that up to 14 wavelengths were successfully demonstrated with a wavelength spacing of 1.6 nm.The output power was more than OdBm and the side mode suppression ratio was about 30dB. The highest mode-locking frequency was 1.05 GHz and the pulse-width of output pulse trains was 216ps.
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