학술논문

Experimental Investigation on Dynamic Properties and Noise Reduction in Actively Mode-Locked Lasers by External CW Optical Injection
Document Type
Periodical
Source
Journal of Lightwave Technology J. Lightwave Technol. Lightwave Technology, Journal of. 39(9):2924-2930 May, 2021
Subject
Communication, Networking and Broadcast Technologies
Photonics and Electrooptics
Laser noise
Laser mode locking
Semiconductor lasers
Optical pumping
Optical fibers
Optical noise
Radio frequency
Harmonic active mode-locking
injection-locking
noise dynamics
phase noise
RIN
supermode noise
timing jitter
Language
ISSN
0733-8724
1558-2213
Abstract
We report on a detailed analysis of the effect of CW injection in an actively mode-locked laser at 780 nm, on the noise performances of the laser. The optical properties of the emitted pulse train, and the phase and amplitude noise of the RF pulse train generated after photodetection have been characterized with respect to the laser pumping rate, and to the injected power. We show that when injected, the laser exhibits a dramatic improvement of both RF phase noise and power spectrum, but at the expense of a degraded optical relative intensity noise.