A magnitude modulation method of laser diode based on real-time power feedback

Xue Mengfan; Peng Dongliang; Rong Yingjiao; Shentu Han; Luo Ji'an; Chen Zhikun; Liu Zhiwei

doi:10.3788/IRLA201948.0905002

The conventional magnitude modulation method of laser diode(LD) has defects, such as unstable modulated magnitude and nonlinear distortion, therefore a new LD magnitude modulation method based on the real-time power feedback was proposed in this paper. Photodiode(PD) was employed to monitor the output power of LD. And the operating current of LD was adjusted automatically according to the monitored output power of LD, by which the output power of LD varied with modulation signal. Finally, a prototype was built and tested. In the range of 20℃ to 40℃, The -3 dB bandwidth of prototype was up to 20 MHz, the stability of modulated magnitude was less than 4% and maximum nonlinear error was only 0.1%. The results show that the stability of LD output power is improved; the nonlinear distortion of modulated wave is also reduced, with linear working range of semiconductor lasers expanded.

A magnitude modulation method of laser diode based on real-time power feedback

1. School of Automation,Hangzhou Dianzi University,Hangzhou 310018,China;

2. Science and Technology on Near-surface Detection Laboratory,Wuxi 214035,China;

3. Beijing Institute of Astronautical Systems Engineering,Beijing 100076,China

Received Date: 2019-04-05

Rev Recd Date: 2019-05-15

Publish Date: 2019-09-25

Key words:

Abstract: The conventional magnitude modulation method of laser diode(LD) has defects, such as unstable modulated magnitude and nonlinear distortion, therefore a new LD magnitude modulation method based on the real-time power feedback was proposed in this paper. Photodiode(PD) was employed to monitor the output power of LD. And the operating current of LD was adjusted automatically according to the monitored output power of LD, by which the output power of LD varied with modulation signal. Finally, a prototype was built and tested. In the range of 20℃ to 40℃, The -3 dB bandwidth of prototype was up to 20 MHz, the stability of modulated magnitude was less than 4% and maximum nonlinear error was only 0.1%. The results show that the stability of LD output power is improved; the nonlinear distortion of modulated wave is also reduced, with linear working range of semiconductor lasers expanded.

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Reference (14)

[1]	He Guanglong, Xu Li, Jin Liang, et al. Double SESAM passively model-locked ultrashort pulse fiber laser[J]. Infrared and Laser Engineering, 2018, 47(5):0505002. (in Chinese)
[2]	Zhang Zhiyong, Zhang Jing, Zhu Dayong. Laser range finder based on phase shift measurement[J]. Opto-Electronic Engineering, 2006, 33(8):75-78. (in Chinese)
[3]	Meng Dongdong, Zhang Hongbo, Li Mingshan, et al. Laser technology for direct IR countermeasure system[J]. Infrared and Laser Engineering, 2018, 47(11):1105009. (in Chinese)
[4]	Lai Yinjuan, Yu Jianhua, Han Shurong, et al. Experimental study on current modulation characteristics of a 808 nm Quantum-well laser[J]. Laser Journal, 2001, 22(2):8-10. (in Chinese)
[5]	Li Tiejun, Mi Xianqiang. A design of diode laser output power autocontrol system[J]. Applied Laser, 2012, 32(5):424-428.
[6]	Chen Yanchao, Feng Yongge, Zhang Xianbing. Large current nanosecond pulse generating circuit for driving semiconductor laser[J]. Optics and Precision Engineering, 2014, 22(11):3145-3151. (in Chinese)
[7]	Sun Ting. Research on hand-held laser distance meter[D]. Beijing:Beijing Jiaotong University, 2012. (in Chinese)
[8]	Journet B, Bazin G. Different designs of light emitters applied to laser diode range-finders[C]//23rd International Conference on Industrial Electronics, Control and Instrumentation, 1997.
[9]	Cao Ruiming. The research of the semiconductor laser power on the stability[D]. Harbin:Harbin University of Science and Technology, 2008. (in Chinese)
[10]	Piao Haizhen, Chen Chenjia, Guo Changzhi. Characteristics of CaInAs/A1InAs quantum well laser-Effect of intervalence band absorption on differential quantum efficiency and characteristic temperature[J]. Semiconductor Optoelectronics, 1999, 20(1):22-27. (in Chinese)
[11]	Tong Cunzhu, Wang Lijie, Tian Sicong, et al. Study on Bragg reflection waveguide diode laser[J]. Chinese Optics, 2015, 8(3):480-498. (in Chinese)
[12]	Jia Fangxiu, Ding Zhenliang, Yuan Feng. Design on high frequency amplitude modulation of laser diode[J]. Laser Infrared, 2007, 37(11):1174-1177. (in Chinese)
[13]	Qiu Bocang, Hu Hai, Wang Weimin, et al. Design and fabrication of 12 W high power and high reliability 915 nm semiconductor lasers[J]. Chinese Optics, 2018, 11(4):590-603.
[14]	Liu Youqiang, Cao Yinhua, Li Jing, et al. 5 kW fiber coupling diode laser for laser processing[J]. Optics and Precision Engineering, 2015, 23(5):1279-1287. (in Chinese)

A magnitude modulation method of laser diode based on real-time power feedback

doi: 10.3788/IRLA201948.0905002

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