A novel design of high precision driving system of laser diode for TDM-pumped fiber Raman amplifier

Jiawei Zhang; Yongtao Jian; Jiajia Yao; Huaqiu Deng

doi:10.1117/12.2638691

29 April 2022 A novel design of high precision driving system of laser diode for TDM-pumped fiber Raman amplifier

Jiawei Zhang, Yongtao Jian, Jiajia Yao, Huaqiu Deng

Proceedings Volume 12255, 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022); 122550M (2022) https://doi.org/10.1117/12.2638691
Event: 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022), 2022, Chongqing, China

Abstract

In order to solve the problem that the output power and wavelength of LD (Laser Diode) were easily influenced by driving current and working temperature in TDM (time-division multiplexing)-pumped fiber Raman amplifier (FRA), a stable and highly precise LD driving system based on FPGA (field-programmable gate array) is proposed. Compared with the existing design, mainly based on integrated chips with low output current and instability defects, the circuit design in this paper simplifies the circuit structure, reduces the cost, and improves stability. A constant current source with Darlington tube and temperature control system based on the FPGA is used in the driving system, allowing for a higher output current and more excellent stability. Experimental results show that the system is capable of delivering up to 2000mA current to the LD with a precision of 0.16%. The temperature control precision reaches 0.05‡C with the current driving stability, which reaches 0.02% when the LD achieves 500mW optical power output. It is concluded that the driving system works stably and is suitable for the TDM-pumped fiber Raman amplifier.

Citation Download Citation

Jiawei Zhang, Yongtao Jian, Jiajia Yao, and Huaqiu Deng "A novel design of high precision driving system of laser diode for TDM-pumped fiber Raman amplifier", Proc. SPIE 12255, 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022), 122550M (29 April 2022); https://doi.org/10.1117/12.2638691

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KEYWORDS

Fiber amplifiers

Control systems

Field programmable gate arrays

Laser stabilization

Raman spectroscopy

Optical amplifiers

Time division multiplexing

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