Directional emission InP/GaInAsP square-resonator microlasers.
InP/GaInAsP square-resonator microlasers with an output waveguide connected to the midpoint of one side of the square are fabricated by standard photolithography and inductively-coupled-plasma etching technique. For a 20-mum-side square microlaser with a 2-mum-wide output waveguide, cw threshold current is 11 mA at room temperature, and the highest mode Q factor is 1.0x10(4) measured from the mode linewidth at the injection current of 10 mA. Multimode oscillation is observed with the lasing mode wavelength 1546 nm and the side-mode suppression ratio of 20 dB at the injection current of 15 mA.
Huang
Yong-Zhen
YZ
State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, China. yzhuang@semi.ac.cn
Che
Kai-Jun
KJ
Yang
Yue-De
YD
Wang
Shi-Jiang
SJ
Du
Yun
Y
Fan
Zhong-Chao
ZC