Portable source of powerful short pulses at wavelength 532 nm based on Nd:YAG/Cr:YAG crystal microchip laser pumped by array of multiwavelength laser diodes

Yakovin, M.D., Yakovin, D.V., Gribanov, А.V., Korablin P.D., Latkin N.I., Kutikova O.Y., Molodykh M.V., Starynin M.Y., Panarin V.A.

For Russian citation (Opticheskii Zhurnal):

Яковин М.Д., Яковин Д.В., Грибанов А.В., Кораблин П.Д., Латкин Н.И., Кутикова О.Ю., Молодых Л.С., Молодых М.В., Старынин М.Ю., Панарин В.А. Портативный источник мощных коротких импульсов на длине волны 532 нм на основе микрочип-лазера на кристалле YAG:Nd/YAG:Cr с накачкой массивом мультиволновых лазерных диодов // Оптический журнал. 2026. Т. 93. № 1. С. 3–11. http://doi.org/10.17586/1023-5086-2026-93-01-3-11

Yakovin M.D., Yakovin D.V., Gribanov A.V., Korablin P.D., Latkin N.I., Kutikova O.Yu., Molodykh L.S., Molodykh M.V., Starynin M.Yu., Panarin V.A. Portable source of powerful short pulses at wavelength 532 nm based on Nd:YAG/Cr:YAG crystal microchip laser pumped by array of multiwavelength laser diodes // Opticheskii Zhurnal. 2026. V. 93. № 1. P. 3–11. http://doi.org/10.17586/1023-5086-2026-93-01-3-11

For citation (Journal of Optical Technology):

Abstract:

Subject of the Study. Second harmonic generation from an experimental microchip laser sample developed previously and improved in the presented work. Objective. To obtain second harmonic generation from a compact microchip laser with high peak power and pulse energy. Method. Increased nonlinear optical conversion efficiency was achieved due to the high peak power of laser radiation. Directly coatings of cavity mirrors to the ends of the active element simplified the design. A multiwavelength laser diodes array was used as a pump source. To enhance the efficiency, an optical collimation system for pump radiation was employed, converting its divergences in orthogonal cross sections into values of the same order. Main Results. Second harmonic generation (532 nm) with a conversion efficiency of 32% was obtained for a Nd:YAG/Cr:YAG microchip laser operating without thermal stabilization system. The pulses with highly stable amplitudes were obtained, with energies of 5 mJ at 1064 nm and 1.6 mJ at 532 nm. Multipulse generation modes were identified with increasing pump pulse duration. Practical significance. The obtained results enable the development of a series of portable sources of high-power short pulses from the spectrum optical ranges for use in materials processing, spectroscopy, optical location, atmospheric sensing, and the study of new nonlinear optical materials.

Keywords:

microchip laser, Nd:YAG laser, passive Q-switching, Cr:YAG, diode pumping, frequency conversion

Acknowledgements:

the authors express their deep gratitude to Sergei L. Mikerin, Senior Researcher at the Institute of Archaeology and Electrochemistry SB RAS, PhD (Physics and Mathematics), for useful discussions and assistance in working on the text.

OCIS codes: 140.3530, 140.3480, 140.3540, 190.2620

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