期刊
IEEE PHOTONICS TECHNOLOGY LETTERS
卷 23, 期 20, 页码 -出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2011.2164058
关键词
Injection-locked oscillators; microwave oscillators; mode-locked lasers; optical frequency combs; quantum-dash lasers
资金
- Science Foundation Ireland (SFI) [07/IN.1/I929]
- European Community [FP/2007-2013, 224547]
We report optical injection-locking in 21-GHz single-section and two-section InAs/InP 1.5-mu m quantum-dash mode-locked lasers. Two distinct mode-locked regimes were observed and successfully locked to the optically injected light. The single-section laser only operates as a self-mode-locked laser while the two-section laser could operate as both a self-mode-locked laser and saturable-absorber dominated mode-locked laser. The continuous-wave (CW) injection-locked self-mode-locked laser shows wide tuning of the mode-locked frequency (approximate to 270 MHz) within the locking range. The CW injection-locked saturable-absorber dominated mode-locked laser demonstrates wide optical spectrum, and 5.5 x reduction in the time-bandwidth product of the pulses. Using dual-mode injection, strong reduction of timing jitter (approximate to 235 fs) is possible leading to the generation of a wide coherent frequency comb. Coherence between all the modes and the master laser is confirmed by measuring the RF beat note of each mode with a narrow linewidth laser.
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