Fig. 1. Electrofluorescence emission spectrum of laser at 20 ℃ in continuous wave mode with 20 mA injection current

Fig. 2. Lasing spectrum of laser at 20 ℃ in continuous wave mode with different injection currents

Fig. 3. Wavelength of single-mode peak as a function of injection current

Fig. 4. Lasing spectra of quantum well laser with different injection currents under continuous wave mode at 20 ℃. (a) 40-58 mA; (b) 40-42 mA

Fig. 5. Output power as a function of injection current of quantum well laser under continuous wave mode at 20 ℃. Inset shows SMSR as function of wavelength with 62 mA injection current