Polarization control and tuning efficiency of tunable vertical-cavity surface-emitting laser with internal-cavity sub-wavelength grating

Wang Xiao-Long, Zou Yong-Gang^†, He Zhi-Fang, Liu Guo-Jun^‡, Ma Xiao-Hui^§

The confinement factor (a) and the threshold gain (b) of the tunable VCSEL with SCC and ISWG structures, respectively.