標題: Suppression of supermode and phase noises in mode-locked erbium-doped fiber laser with a semiconductor optical amplifier based high-pass filter
作者: Wu, MC
Chang, YC
Lin, GR
光電工程學系
Department of Photonics
關鍵字: mode-locked lasers;supermode noise (SMN) suppression;single-sided-band (SSB) phase noise;semiconductor optical amplifier (SOA)
公開日期: 2005
摘要: The variations and trade-off between single-sided-band (SSB) phase noise and superrnode noise (SMN) Suppression ratio of an actively mode-locked erbium-doped fiber laser (EDFL) with intra-cavity semiconductor optical amplifier (SOA) based high-pass filter are discussed. The insertion of an SOA increases the SMN suppression ratio of the EDFL from 26 dB to 41.4 dB, however, the SSB phase noise at 100 kHz offset frequency from carrier is concurrently degraded from -114 dBc/Hz to -96 dBc/Hz. Such an operation also causes a broadening in the EDFL pulsewidth from 36 ps to 130 ps. The insertion of an optical bandpass filter (OBPF) further reduces the SSB phase noise to -110 dBc/Hz and improves the SMN suppression ratio to 43 dB. Theoretical simulation interprets that the optimized operation of the SOA based highpass filter at nearly transparent current condition is mandatory to achieve a better SMN Suppression ratio and minimize the SSB phase noise of the mode-locked EDFL without sacrificing its output pulsewidth.
URI: http://hdl.handle.net/11536/17877
http://dx.doi.org/10.1117/12.587977
ISBN: 0-8194-5683-7
ISSN: 0277-786X
DOI: 10.1117/12.587977
期刊: Fiber Lasers II: Technology, Systems, and Applications
Volume: 5709
起始頁: 371
結束頁: 378
顯示於類別:會議論文