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http://dx.doi.org/10.14372/IEMEK.2019.14.6.321

Control and Monitoring of Wavelengths in Spectral Beam Combining System Based on High Resolution Camera  

Seung, Ji Hoon (Agency for Defence Development)
Lee, Kwang Hyun (Agency for Defence Development)
Lee, Jung Hwan (Agency for Defence Development)
Publication Information
IEMEK Journal of Embedded Systems and Applications / v.14, no.6, 2019 , pp. 321-327 More about this Journal
Abstract
Spectral Beam Combining (SBC) is used for a high-power fiber laser in order to overcome the power limitation of single fiber laser. In SBC, several laser bwams with different wavelengths are combined to obtain a single-aperture beam by diffraction grating. The combining efficiency is dependent on a linewidth, beam quality and specific wavelength of each beam among others. In this paper, we consider the method of a wavelength monitoring and a feedback control of laser diodes used as seeds of laser beams to obtain optimum combining conditions. In order to measure the wavelengths of multi-beam, we use the high resolution camera and diffraction grating with 1,800l/mm. The experiment results show the possibility of feedback control of a current and temperature of multi-seed laser diodes to obtain optimum wavelengths for SBC.
Keywords
High power laser; Spectral beam combining; Wavelength monitoring; Diffraction grating; Seed laser diode control;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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