Competition of Rational Harmonic Mode-Locking and Continuous-Wave Lasing in Semiconductor Optical Amplifier Fiber Laser Under Optical Pulse Injection

Twentieth-order rational harmonic mode-locking (RHML) semiconductor optical amplifier fiber laser (SOAFL) pulses are demonstrated by using 1-GHz backward dark-optical comb injection. Maximum frequency detuning range of plusmn 300 Hz, broadened pulsewidth of 35 ps, and highest average power of 0.4 mu...

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Veröffentlicht in:	Journal of lightwave technology 2009-04, Vol.27 (7), p.851-856
Hauptverfasser:	LEE, Chao-Kuei, KANG, Jung-Jui, LIN, Gong-Ru
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Circuit properties Competition Continuous fibers Continuous-wave lasing dark-optical comb Doped-insulator lasers and other solid state lasers Electric, optical and optoelectronic circuits Electronics Erbium-doped fiber lasers Exact sciences and technology Fiber lasers Frequency Fundamental areas of phenomenology (including applications) Harmonics injection Integrated optics. Optical fibers and wave guides Laser mode locking Lasers Lasing linewidth Optical and optoelectronic circuits Optical fibers Optical pulses Optics Physics Pulse amplifiers Pulse modulation rational harmonic mode-locked Semiconductor lasers semiconductor optical amplifier Semiconductor optical amplifiers Wavelengths
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Zusammenfassung:	Twentieth-order rational harmonic mode-locking (RHML) semiconductor optical amplifier fiber laser (SOAFL) pulses are demonstrated by using 1-GHz backward dark-optical comb injection. Maximum frequency detuning range of plusmn 300 Hz, broadened pulsewidth of 35 ps, and highest average power of 0.4 muW for twentieth-order RHML-SOAFL pulse are characterized. The extraordinary phenomena on the red-shifted wavelength from 1535.5 to 1541.5 nm and the corresponding spectral linewidth reduced from 12 to 3 nm are observed with the RHML order increasing to 8 or higher. Such a less pronounced RHML mechanism at higher orders occurred in the optically injection mode-locked SOAFL is mainly attributed to the weak mode-locking strength at high RHML orders as compared to continuous-wave lasing mechanism.
ISSN:	0733-8724 1558-2213
DOI:	10.1109/JLT.2008.927771