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Proceedings Paper

Control of laser wavelength tuning and its application in coherent optical time domain reflectometer
Author(s): Lidong Lu; Xiaoyan Sun; Binglin Li
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Paper Abstract

A laser diode temperature control scheme is adopted to achieve the laser wavelength tuning of a narrow linewidth laser, which sends commands by serial communication to change the laser diode temperature. The laser diode temperature is presented by the temperature sensitive resistance. And then the laser wavelength tuning method is also used in a coherent optical time domain reflectometer (C-OTDR) to reduce the coherent Rayleigh noise (CRN) caused by the coherence of the narrow linewidth laser. As the serial communication for the laser wavelength tuning is time-consuming which costs at least 10ms to finish the wavelength tuning once, the measurement time and efficiency of the C-OTDR should be considered. And then the relationship between the times for the laser wavelength changing and the CRN fluctuation is experimentally studied to balance the measurement time consumption and the measurement results, which illustrates that the laser wavelength needs not be changed in each measurement period of the C-OTDR and it can also obtain the ideal result to change the laser wavelength every 500 measurement periods. In traditional C-OTDR, by serial communication, the laser wavelength is changed in each measurement period and the total measurement periods are 218, so by the new scheme it can save about 2600 seconds to achieve an ideal measurement, which is of high efficiency.

Paper Details

Date Published: 28 February 2017
PDF: 7 pages
Proc. SPIE 10256, Second International Conference on Photonics and Optical Engineering, 1025629 (28 February 2017); doi: 10.1117/12.2257405
Show Author Affiliations
Lidong Lu, Global Energy Interconnection Research Institute (China)
Xiaoyan Sun, Global Energy Interconnection Research Institute (China)
Binglin Li, Global Energy Interconnection Research Institute (China)


Published in SPIE Proceedings Vol. 10256:
Second International Conference on Photonics and Optical Engineering
Chunmin Zhang; Anand Asundi, Editor(s)

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