Experimental studies for improvement of thermal effects in a high-power fiber-coupled diode laser module operating at 808 nm

Ashraf F. El-Sherif; Khalid Hussein; Mahmoud F. Hassan; Mahmoud M. Talat

doi:10.1117/12.901945

8 February 2012 Experimental studies for improvement of thermal effects in a high-power fiber-coupled diode laser module operating at 808 nm

Ashraf F. El-Sherif, Khalid Hussein, Mahmoud F. Hassan, Mahmoud M. Talat

Author Affiliations +

Proceedings Volume 8241, High-Power Diode Laser Technology and Applications X; 824115 (2012) https://doi.org/10.1117/12.901945
Event: SPIE LASE, 2012, San Francisco, California, United States

Abstract

High power diode laser module operating at 808 nm is required for different applications, such as developing an efficient high power Nd³⁺-doped solid state laser and Tm3+ -doped silica fiber laser, industrial, medical and military applications. Optical and thermal images characterization for a fiber-coupled high power diode laser module is presented experimentally for 6.6 Watt output optical power .An external temperature controller system was designed, which stabilizes the central wavelength at 808 nm at 25°C over a wide range of diode laser driving current from 1A to 6 A. without this cooling system, the wavelength changes by 0.35nm/°C for temperature changes from 20°C to 40°C at the same range of the driving current. In this paper we have present a methodology for temperature reduction of a 808 nm high power diode laser module, based on dynamically thermal control, which is known as dynamic thermal management. Stabilization of the output wavelength has been done by using proportional speed control (PSC) of a CPU cooling fan with certain scheme of straight fins heat sink. Two electronic circuits based on pulse width modulation (PWM) in microcontroller and comparators IC have been used. This technique can be considered as an effective mechanism for reducing temperature and power dissipation to make stabilization of the diode laser output wavelength by preventing heat accumulation from the thermo electric cooling (TEC) inside the diode laser module confirmed by thermal images.

Citation Download Citation

Ashraf F. El-Sherif, Khalid Hussein, Mahmoud F. Hassan, and Mahmoud M. Talat "Experimental studies for improvement of thermal effects in a high-power fiber-coupled diode laser module operating at 808 nm", Proc. SPIE 8241, High-Power Diode Laser Technology and Applications X, 824115 (8 February 2012); https://doi.org/10.1117/12.901945

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