High-power, high-beam quality miniaturized laser module for pumping of solid state lasers at 980 nm

P. Hildenstein; A. Sahm; D. Feise; M. Gorjan; S. Tacchini; K. Paschke; G. Tränkle

doi:10.1117/12.2543002

2 March 2020 High-power, high-beam quality miniaturized laser module for pumping of solid state lasers at 980 nm

P. Hildenstein, A. Sahm, D. Feise, M. Gorjan, S. Tacchini, K. Paschke, G. Tränkle

Proceedings Volume 11262, High-Power Diode Laser Technology XVIII; 112620J (2020) https://doi.org/10.1117/12.2543002
Event: SPIE LASE, 2020, San Francisco, California, United States

Abstract

This work presents a miniaturized laser module featuring an optical output power of more than 14Win continuous wave operation. Simultaneously, a beam quality factor of less than 2 is reached at the operating power. The laser module layout is based on the use of tapered diode lasers featuring wavelength stabilization by a monolithic distributed Bragg grating. Such a single laser source achieves a reliable output power in the order of 8W in continuous wave mode at a wavelength of 980nm [1]. To enhance the output power while maintaining the beam quality of the single emitters, two laser beams were combined by the use of polarization coupling. The use of custom designed beam couplers is necessary to combine the given radiation intensities. A thin film polarization optic, adapted to the output wavelength was used. All optical components where designed to be housed inside of a module with a footprint of 58 x 34mm². Due to the close spatial vicinity of the laser sources, thermal simulations were carried out to avoid thermal crosstalk and ensure stable laser operation. The modules high beam quality enables pumping of solid state lasers and amplifiers even without challenging optical pumping geometries.

Conference Presentation

Citation Download Citation

P. Hildenstein, A. Sahm, D. Feise, M. Gorjan, S. Tacchini, K. Paschke, and G. Tränkle "High-power, high-beam quality miniaturized laser module for pumping of solid state lasers at 980 nm", Proc. SPIE 11262, High-Power Diode Laser Technology XVIII, 112620J (2 March 2020); https://doi.org/10.1117/12.2543002

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