J. Semicond. > 2015, Volume 36?>?Issue 9?> 094009

SEMICONDUCTOR DEVICES

Free-space communication based on quantum cascade laser

Chuanwei Liu, Shenqiang Zhai, Jinchuan Zhang, Yuhong Zhou, Zhiwei Jia, Fengqi Liu and Zhanguo Wang

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 Corresponding author: Zhai Shenqiang, zsqlzsmbj@semi.ac.cn

DOI: 10.1088/1674-4926/36/9/094009

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Abstract: A free-space communication based on a mid-infrared quantum cascade laser (QCL) is presented. A room-temperature continuous-wave distributed-feedback (DFB) QCL combined with a mid-infrared detector comprise the basic unit of the communication system. Sinusoidal signals at a highest frequency of 40 MHz and modulated video signals with a carrier frequency of 30 MHz were successfully transmitted with this experimental setup. Our research has provided a proof-of-concept demonstration of space optical communication application with QCL. The highest operation frequency of our setup was determined by the circuit-limited modulation bandwidth. A high performance communication system can be obtained with improved modulation circuit system.

Key words: quantum cascade laser, free-space communication, video transmission



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Fig1.  Power-current-voltage curve of the QCL. The picture on the upper left corner is the laser employed in the experiment.

Fig2.  Normalized spectra of the laser emission and the detector response.

Fig3.  Scheme of FSO communication system.

Fig4.  Frequency characteristics of the transmitting system. The lines 1 are input sinusoidal signals and the lines 2 are received ones. The transmission of (a) 20 MHz,(b) 30 MHz,(c) 40 MHz,and (d) 60 MHz sinusoidal signal.

Fig5.  Picture of the video transmission. An oscilloscope displaying sinusoidal wave was chosen as the target of the analog camera. The transmission result was displayed by an LCD.

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    Received: 16 April 2015 Revised: Online: Published: 01 September 2015

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      Chuanwei Liu, Shenqiang Zhai, Jinchuan Zhang, Yuhong Zhou, Zhiwei Jia, Fengqi Liu, Zhanguo Wang. Free-space communication based on quantum cascade laser[J]. Journal of Semiconductors, 2015, 36(9): 094009. doi: 10.1088/1674-4926/36/9/094009 ****C W Liu, S Q Zhai, J C Zhang, Y H Zhou, Z W Jia, F Q Liu, Z G Wang. Free-space communication based on quantum cascade laser[J]. J. Semicond., 2015, 36(9): 094009. doi: 10.1088/1674-4926/36/9/094009.
      Citation:
      Chuanwei Liu, Shenqiang Zhai, Jinchuan Zhang, Yuhong Zhou, Zhiwei Jia, Fengqi Liu, Zhanguo Wang. Free-space communication based on quantum cascade laser[J]. Journal of Semiconductors, 2015, 36(9): 094009. doi: 10.1088/1674-4926/36/9/094009 ****
      C W Liu, S Q Zhai, J C Zhang, Y H Zhou, Z W Jia, F Q Liu, Z G Wang. Free-space communication based on quantum cascade laser[J]. J. Semicond., 2015, 36(9): 094009. doi: 10.1088/1674-4926/36/9/094009.

      Free-space communication based on quantum cascade laser

      DOI: 10.1088/1674-4926/36/9/094009

      • Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China

      Funds:

      Project supported by the State Key Development Program for Basic Research of China (Nos. 2013CB632801, 2013CB632803) and the National Natural Science Foundation of China (Nos. 61435014, 61306058, 61274094).

      More Information
      • Corresponding author: Zhai Shenqiang, zsqlzsmbj@semi.ac.cn
      • Received Date: 2015-04-16
      • Accepted Date: 2015-05-07
      • Published Date: 2015-01-25

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