Fig. 1. Functional block diagram of laser

Fig. 2. Schematic diagram of driving current circuit

Fig. 3. Schematic diagram of temperature control circuit

Fig. 4. Test results of injection current stability

Fig. 5. Test results of operating temperature stability

Fig. 6. (a) Laser temperature tuning characteristic; (b) Laser current tuning characteristic

Fig. 7. Short term test results of laser output wavelength

Fig. 8. Test results of laser operating temperature and injection current

Fig. 9. Test results of laser output wavelength