Title :
Subharmonic synchronous and hybrid mode-locking of a monolithic DBR laser operating at millimeter-wave frequencies
Author :
Nirmalathas, A. ; Liu, H.F. ; Ahmed, Z. ; Novak, D. ; Ogawa, Y.
Author_Institution :
Dept. of Electr. & Electron. Eng., Melbourne Univ., Parkville, Vic., Australia
fDate :
4/1/1997 12:00:00 AM
Abstract :
A detailed comparison of subharmonic synchronous and subharmonic hybrid mode-locking of a monolithic distributed Bragg reflector (DBR) laser operating at 33 GHz is presented. Optical injection at the 20th subharmonic frequency (1.65 GHz) has produced a locking range of 10 MHz with negligible amplitude modulation. In comparison, electrical injection at the 4th subharmonic frequency (5.83 GHz) has shown higher levels of amplitude modulation and a narrower locking range (4 MHz). While subharmonic hybrid mode-locking remains a simple and cost effective solution for the generation of low timing jitter high-repetition rate optical pulse trains, subharmonic synchronous mode-locking shows superior performance with regard to reduced amplitude modulation and larger locking range.
Keywords :
amplitude modulation; distributed Bragg reflector lasers; jitter; laser mode locking; laser noise; millimetre wave lasers; phase noise; semiconductor lasers; synchronisation; 1.65 GHz; 33 GHz; 5.83 GHz; amplitude modulation; distributed Bragg reflector laser; electrical injection; locking range; low timing jitter high-repetition rate optical pulse trains; millimeter-wave frequencies; monolithic DBR laser; optical injection; subharmonic hybrid mode-locking; subharmonic synchronous mode-locking; Amplitude modulation; Costs; Distributed Bragg reflectors; Frequency; Hybrid power systems; Laser mode locking; Optical modulation; Optical pulse generation; Synchronous generators; Timing jitter;
Journal_Title :
Photonics Technology Letters, IEEE
