Fig. 1. Schematic of the MOPA diode laser^[8]

Fig. 2. Model of MOPA diode laser chip and packaging of the chip

Fig. 3. Curve of T_j in P-side up and N side with heat sink

Fig. 4. Curve of T_j between P-down and P-side up with heat spreader submount

Fig. 5. Curve of T_j in two different structures with P-side up

Fig. 6. Curve of T_j as submount dimension changes

Fig. 7. Picture of real product

Fig. 8. Test picture of MOPA diode laser and curve of P-I

Fig. 9. Spectrum of the MOPA diode laser in CW mode and the spectrum in different current