LOCKING RANGE OF A HYBRID MODE-LOCKED MONOLITHIC DBR SEMICONDUCTOR-LASER AT MILLIMETER-WAVE FREQUENCIES

We present the first investigation of the detuning characteristics at 33 GHz of a hybrid mode-locked monolithic distributed Bragg reflector semiconductor laser, Hybrid mode-locking is achieved by applying a rad io-frequency (rf) signal, at a frequency corresponding to the fundamen tal laser repetition frequency, to the saturable absorber of the passi vely mode-locked laser, Measurements show a 3-dB locking range greater than 40 MHz with an applied external rf signal power of 0 dBm. At thi s power level, the laser beat signal exhibited phase-noise less than - 78 dBc/Hz and -93 dBc/Hz at 10 kHz and 5 MHz offsets, respectively.