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The effect of backward-injecting wavelength on the mode-locking dynamics of a semiconductor-amplifier-based fiber laser
Author(s): Yi-Shiang Chu; Yu-Sheng Liao; Yu-Huang Lin; Yung-Cheng Chang; Gong-Ru Lin
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Paper Abstract

The wavelength dependent mode-locking performances of a SOAFL under the backward optical injection via a sinusoidal-modulated distributed feedback laser diode (DFBLD) at 1 GHz repetition rate are characterized. The backward optical injection has to be sufficiently high to saturate a SOA and then depletes most of the excited state electrons in the SOA. In order to obtain shorter mode-locking pulsewidth, the DFBLD injecting wavelength should be slightly longer than the peak wavelength of SOA gain to benefit from shorter gain-recovery time and larger modulation depth. As the wavelength of a DFBLD approach the central wavelength of SOA, the shortest pulse was measured via a digital sampling oscilloscope (DSO). The pulses can also be obtained by DFBLD backward injection at 1535 nm in feedback of SOAFL, leading to the optimized pulsewidths of 22.7 ps.

Paper Details

Date Published: 31 January 2005
PDF: 8 pages
Proc. SPIE 5624, Semiconductor and Organic Optoelectronic Materials and Devices, (31 January 2005); doi: 10.1117/12.577066
Show Author Affiliations
Yi-Shiang Chu, National Chiao Tung Univ. (Taiwan)
Yu-Sheng Liao, National Chiao Tung Univ. (Taiwan)
Yu-Huang Lin, National Chiao Tung Univ. (Taiwan)
Yung-Cheng Chang, National Chiao Tung Univ. (Taiwan)
Gong-Ru Lin, National Chiao Tung Univ. (Taiwan)

Published in SPIE Proceedings Vol. 5624:
Semiconductor and Organic Optoelectronic Materials and Devices
Chung-En Zah; Yi Luo; Shinji Tsuji, Editor(s)

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