Title :
High-Speed Direct-Modulated Unidirectional Emission Square Microlasers
Author :
Heng Long ; Yong-Zhen Huang ; Yue-De Yang ; Ling-Xiu Zou ; Jin-Long Xiao ; Xiu-Wen Ma ; Xiao-Meng Lv ; Bo-Wen Liu ; Yun Du
Author_Institution :
State Key Lab. on Integrated Optoelectron., Inst. of Semicond., Beijing, China
Abstract :
High-speed modulation characteristics are investigated for a 20-μm-side-length AlGaInAs/InP square resonator microlaser with a 1.5-μm-wide midpoint output waveguide. Single-mode operation with a maximum output power of 0.34 mW and a side mode suppression ration of 42 dB are realized for the microlaser at a temperature of 288 K. A 3-dB bandwidth of 14.9 GHz is obtained, and the eye diagrams at 15 and 20 Gb/s are demonstrated for the microlaser with a bias current of 30 mA. Furthermore, the bit error rate of 2 × 10-8 is obtained at 8 Gb/s for a square microlaser with a 3-dB bandwidth of 10 GHz. In addition, different output patterns are observed for different lasing modes, which agree with the finite-difference time-domain simulation results.
Keywords :
III-V semiconductors; aluminium compounds; gallium compounds; indium compounds; laser cavity resonators; laser modes; micro-optics; optical modulation; optical waveguides; semiconductor lasers; AlGaInAs-InP; bandwidth 14.9 GHz to 10 GHz; bias current; bit error rate; bit rate 8 Gbit/s; current 30 mA; eye diagrams; high-speed direct-modulated unidirectional emission square microlasers; high-speed modulation characteristics; lasing modes; output patterns; power 0.34 mW; side mode suppression; single-mode operation; size 20 mum to 1.5 mum; square resonator microlaser; temperature 288 K; Bandwidth; Current measurement; Modulation; Optical resonators; Optical waveguides; Power generation; Temperature measurement; Eye diagram; Microlaser; eye diagram; microlaser; small-signal response; square resonator;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2014.2385104
