Long pulse compact and high-brightness near 1-kW QCW diode laser stack

Stewart Wilson; Gregory Altshuler; Andrey Erofeev; Mikhail Inochkin; Leonid Khloponin; Valery Khramov; Felix Feldchtein

doi:10.1117/12.908861

8 February 2012 Long pulse compact and high-brightness near 1-kW QCW diode laser stack

Stewart Wilson, Gregory Altshuler, Andrey Erofeev, Mikhail Inochkin, Leonid Khloponin, Valery Khramov, Felix Feldchtein

Proceedings Volume 8241, High-Power Diode Laser Technology and Applications X; 82410F (2012) https://doi.org/10.1117/12.908861
Event: SPIE LASE, 2012, San Francisco, California, United States

Abstract

A custom designed compact, high brightness diode laser array stack was designed and manufactured using proprietary methods that are robust and suitable for low cost manufacturing. The diode laser stack consisted of four 10 mm-wide diode laser bars having lasing wavelength of 970 - 980 nm mounted onto high performance submounts separated by approximately 1mm. Each diode laser bar had a 50% fill factor. The cooling methodology employed used a combined passive and active scheme and not the traditional more expensive and more complicated standard microchannel coolers used for high duty cycle applications. The total combined optical power attained from the diode array stack was close to 1 kW for current levels up to 220 A, limited only by the capability of the power supply. In this paper, we summarize the performance results for this diode laser array and analyze the maximum expected optical performance as a function of operating current and pulse width and junction temperature limit.

Citation Download Citation

Stewart Wilson, Gregory Altshuler, Andrey Erofeev, Mikhail Inochkin, Leonid Khloponin, Valery Khramov, and Felix Feldchtein "Long pulse compact and high-brightness near 1-kW QCW diode laser stack", Proc. SPIE 8241, High-Power Diode Laser Technology and Applications X, 82410F (8 February 2012); https://doi.org/10.1117/12.908861

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