Title :
Synchronous mode-locking in passively mode-locked semiconductor laser diodes using optical short pulses repeated at subharmonics of the cavity round-trip frequency
Author :
Arahira, Shin ; Ogawa, Yoh
Author_Institution :
Semicond. Technol. Lab., OKI Electr. Ind. Co. Ltd., Tokyo, Japan
Abstract :
Synchronous mode-locking was achieved in passively mode-locked semiconductor lasers using optical pulses with repetition rates at subharmonics of the cavity round-trip frequency. Stable and continuous mode-locked pulses at 8.5 GHz were generated when the repetition rate of the control optical pulses was 4.25 GHz (2nd subharmonic). The timing jitter of the mode-locked pulses was reduced to 1 ps. The relationship between repetition rates of the control pulses and the realization of stable and continuous mode-locking was examined.
Keywords :
Q-switching; distributed feedback lasers; high-speed optical techniques; jitter; laser cavity resonators; laser feedback; laser mode locking; optical pulse compression; semiconductor lasers; 1 ps; 4.25 GHz; 8.5 GHz; cavity round-trip frequency; control optical pulses; mode-locked pulses; optical short pulses; passively mode-locked semiconductor laser diodes; repetition rates; stable mode-locking; subharmonics; synchronous mode-locking; timing jitter; Diode lasers; Frequency; Laser mode locking; Optical control; Optical pulse generation; Optical pulses; Optical pumping; Pulse amplifiers; Pulse modulation; Pump lasers;
Journal_Title :
Photonics Technology Letters, IEEE
