11 November 2008 Optical injection mode-locking and DWDM channeling of the weak-resonant-cavity FPLD-based fiber ring lasers
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Proceedings Volume 7134, Passive Components and Fiber-based Devices V; 71342T (2008) https://doi.org/10.1117/12.803770
Event: Asia-Pacific Optical Communications, 2008, Hangzhou, China
10-GHz optical injection mode-locking of a weak-resonant-cavity Fabry-Perot laser diode (WRC-FPLD) with 10%-end-facet reflectivity based fiber ring with an intra-cavity power controlled wavelength shift and a reducing chirp linewidth at high intra-cavity coupling ratio condition is demonstrated. Both the strong dark-optical comb and strong feedback coupling contribute to the red shift of mode-locking spectrum. The wavelength shift from 1536 to 1542 nm of the WRC-FPLD based fiber ring associated with its pulsewidth and linewidth also reduced from 27 to 19 ps and from 10 to 6 nm, respectively, can be observed. The peak-to-peak frequency chirp reduced from 3.5 to 1.8 GHz was caused by the shrink of linewidth. The WRC-FPLD exhibits relatively weak cavity modes and a gain profile covering > 33.5 nm. The least common multiple of the WRC-FPLD and the fiber-ring mode-spacing is tunable by adjusting length of the fiber ring cavity to approach intracavity mode spacing of 1.6 nm. Up to 12 lasing modes naturally and a mode-locking pulsewidth up to 19 ps can be observed. With an additional intracavity bandpass filter, the operating wavelength can further extend from 1520 to 1553.5 nm. After channel filtering and linear dispersion compensating, the pulsewidth can be further compressed to 8 ps with corresponding chirp reducing from 9.7 to 4.3 GHz. Such a mode-spacing tunable pulsed fiber laser matching ITU-T DWDM channels can be employed as a novel optical carrier to integrate the OTDM function into the DWDM system with a channel spacing tunable from 50 to 200 GHz.
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Guo-Hsuan Peng, Guo-Hsuan Peng, Yu-Chan Lin, Yu-Chan Lin, Kuen-Cherng Lin, Kuen-Cherng Lin, Gong-Ru Lin, Gong-Ru Lin, "Optical injection mode-locking and DWDM channeling of the weak-resonant-cavity FPLD-based fiber ring lasers", Proc. SPIE 7134, Passive Components and Fiber-based Devices V, 71342T (11 November 2008); doi: 10.1117/12.803770; https://doi.org/10.1117/12.803770

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