Title :
Generation of wavelength tunable gain-switched pulses from FP MQW lasers with external injection seeding
Author :
Matsui, Y. ; Kutsuzawa, S. ; Arahira, S. ; Ogawa, Y.
Author_Institution :
Semicond. Technol. Lab., Oki Electr. Ind. Co. Ltd., Tokyo, Japan
Abstract :
High-repetition rate (20 GHz), wavelength tunable (40 nm) optical pulses have been generated by gain switching of 1.55-μm Fabry-Perot (FP) multiple-quantum-well (MQW) lasers using continuous-wave (CW) light injection for longitudinal mode selection. After fiber compression, a pulse duration shorter than 5.8 ps was obtained over the entire wavelength tuning range. The pulsewidth, chirping characteristics and side-mode suppression ratio were investigated as functions of the seeding power and wavelength. In addition, we report on the observation of chaos and period doubling for a gain-switched laser without injection seeding, and show that irregular behavior can be suppressed by injection seeding of the laser.
Keywords :
Fabry-Perot resonators; chirp modulation; high-speed optical techniques; laser modes; laser stability; laser tuning; optical chaos; quantum well lasers; 1.55 mum; 20 GHz; 5.8 ps; CW light injection; Fabry-Perot MQW lasers; InGaAlAs-InGaAsP; InGaAlAs-InGaAsP quantum well structure; chaos; chirping characteristics; external injection seeding; fiber compression; gain switching; high-repetition rate wavelength tunable optical pulses; period doubling; pulse duration; pulsewidth; side-mode suppression ratio; wavelength tunable gain-switched pulse generation; Fabry-Perot; Fiber lasers; Laser modes; Laser tuning; Optical pulse generation; Optical pulses; Optical tuning; Pulse compression methods; Quantum well devices; Tunable circuits and devices;
Journal_Title :
Photonics Technology Letters, IEEE
