Jing Liu, Li Zhang, Xiao Deng, Mingzhe Zhao, Bingbing Hu, Chao Du, Liqin Cui. Temperature Control Scheme for 980 nm Semiconductor Laser[J]. Acta Optica Sinica, 2023, 43(7): 0714002
- Acta Optica Sinica
- Vol. 43, Issue 7, 0714002 (2023)
Fig. 1. Schematic diagram of temperature control of 980 nm semiconductor laser based on FPGA
Fig. 2. Schematic diagram of interface circuit of ADC128S022
Fig. 3. Amplification circuit of input voltage
Fig. 4. Principle of semiconductor refrigeration
Fig. 5. Flow diagram of FPGA control module
Fig. 6. Interface diagrams.(a) ADC driving module; (b) state machine switching module
Fig. 7. Flowchart of switching of state machine
Fig. 8. Interface diagrams. (a) DAC driving module; (b) PWM module
Fig. 9. Experimental device diagram
Fig. 10. PI curves of 980 nm laser.(a) PI curves without setting temperature control module; (b) PI curves of setting temperature control module
Fig. 11. Temperature variation of laser
Fig. 12. Output pulse spectrum of EDFA without temperature control module.(a) Output spectrum of EDFA; (b) center wavelength change
Fig. 13. Output pulse spectrum of EDFA when temperature control module is installed.(a) Output spectrum of EDFA; (b) center wavelength change
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Table 1. Design index parameters
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