NDLI: Study on the direct modulation characteristics of high power semiconductor laser

Content Provider	IEEE Xplore Digital Library
Author	Weipeng Wang Yingtian Xu Xiaohui Ma Yonggang Zou Linbao Hou Li Han Yulong Wu Dan Wang Lushuang Ding
Copyright Year	2015
Description	Author affiliation: State Key Lab. on High Power Semicond. Lasers, Changchun Univ. of Sci. & Technol., Changchun, China (Weipeng Wang; Yingtian Xu; Xiaohui Ma; Yonggang Zou; Linbao Hou; Li Han; Yulong Wu; Dan Wang; Lushuang Ding)
Abstract	The direct modulation of high-power semiconductor laser driver that is composed of the current modulation circuit and the over-current protection circuit is introduced, two direct modulation circuits with different modulation output current amplitude are designed and the direct modulation of characteristics is analyzed, providing the output current waveform of the direct modulation of high-power semiconductor laser. In this paper, a new modulation output current with a peak current of 9.5A is designed with bias current of 0.8A and the modulation current bandwidth of 2.56MHz. The width of the modulation current pulse keeps stable after widening. When the input signal is voltage pulse with uniform pulse width, it can output current pulse with uniform pulse width. And the modulation output current with a peak current of 9.5A is designed with bias current of 0.8A and the modulation current bandwidth of 5MHz. We have a theoretical study on the dynamic characteristics of direct modulation of semiconductor laser. We also have done some experiments on the basis of the simulation, the experimental results show that the output pulse laser intensity and the pulse laser modulation signal width change with changing the width of the pulse, and the actual modulated output pulse laser has a certain time delay with respect to the modulated signal.
Starting Page	77
Ending Page	83
File Size	1285612
Page Count	7
File Format	PDF
e-ISBN	9781467374620
DOI	10.1109/ICoOM.2015.7398775
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-07-16
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	High-current Direct modulation Frequency modulation Limiting Threshold current Microelectronics Integrated circuit modeling High-power semiconductor laser Photonics
Content Type	Text
Resource Type	Article

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