Title :
Efficient direct locking of colliding pulse mode-locked lasers on semi-insulating substrate at 1.5 μm
Author :
Lee, H.K. ; Loyo-Maldonado, V. ; Qiu, B.C. ; Lee, K.L. ; Shu, C. ; Pinches, S. ; Thayne, I.G. ; Bryce, A.C. ; Marsh, J.H.
Author_Institution :
Dept. of Electron. & Electr. Eng., Glasgow Univ., UK
Abstract :
Colliding pulse mode-locked (CPM) lasers operating at 1.5 μm and 36-GHz repetition frequency were fabricated on semi-insulating substrates. An RF electrical signal at a repetition rate of 36 GHz was injected into the saturable absorber and hybrid CPM was observed for RF powers as low as -9.0 dBm with a phase noise level of < -70 dBc/Hz at 5-kHz offset. Linewidth narrowing and pedestal suppression became pronounced for RF powers as low as 0 dBm. With an injected RF power of +8 dBm, the worst-case timing jitter was reduced from 4.8 to 0.69 ps ( 100 Hz to 10 MHz).
Keywords :
frequency-domain analysis; laser mode locking; laser noise; optical pulse generation; optical saturable absorption; phase noise; quantum well lasers; timing jitter; waveguide lasers; 1.5 micron; RF signal; clock sources; colliding pulse mode-locked lasers; efficient direct locking; frequency domain analysis; linewidth narrowing; pedestal suppression; phase noise; picosecond range; quantum wells; ridge waveguide; saturable absorber; semi-insulating substrates; semiconductor lasers; stabilized pulse trains; timing jitter; wavelength comb generators; Indium phosphide; Laser mode locking; Laser noise; Optical pulse generation; Optical pulses; Parasitic capacitance; Radio frequency; Semiconductor lasers; Substrates; Timing jitter;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2002.1021965
