Generation of optical waveforms in 1.3-μm SOA-based fiber lasers |
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Authors: | J -Y Wang K -H Lin H -R Chen |
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Institution: | 1.Department of Science,Taipei Municipal University of Education,Taipei,Taiwan;2.Department of Photonics and Institute of Electro-Optical Engineering,National Chiao Tung University,Hsinchu,Taiwan |
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Abstract: | Passive optical waveform generation is obtained in fiber lasers using a 1.3-μm semiconductor optical amplifier (SOA) as the
gain medium. Various waveforms, including square wave, staircase wave, triangular wave, pulse, and dark pulse are generated
in SOA-based fiber lasers by adjusting intracavity polarization controllers. The passive waveform generation might be attributed
to the SOA gain dynamics and the enhanced nonlinear interaction at the 1.3-μm zero dispersion wavelength of traditional single-mode
fiber (SMF), as well as the interference effect between the two sub-cavities of fiber laser. With figure-8 cavity configuration,
1250th-order harmonic pulses have been successfully demonstrated. We have also obtained a free-running SOA-based fiber laser
with 3-dB spectral width of 16 nm, and the center wavelength can be tuned over 45 nm range. |
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