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Heating Dynamics of the Active Region of High-Power Semiconductor Lasers (λ = 1060 nm) with an Ultra-Wide Aperture (800 µm) in the Quasi-CW Mode

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Abstract

An approach is developed to study temporal behavior of the active region overheating in high-power semiconductor lasers (λ = 1060 nm) with an ultrawide aperture (800 μm) operating in a quasi-continuous regime of pumping by current pulses with an amplitude of 21 A, a duration of 1 ms, and a repetition rate of 10 Hz. The approach is based on measuring the lasing dynamics with spectral selection. The lasing spectrum analysis shows that the region of the rising edge, where the amplitude of the current pulse increases, is characterized by a maximum red-shift rate of 30 nm ms–1, which is due to both thermal and nonthermal effects. The pulse region corresponding to a constant pump current amplitude is characterized only by a thermal red shift of the lasing spectrum long-wavelength edge at a rate of ~1 nm ms–1. The obtained experimental active region overheating is 2.78°C for the constant pump current amplitude range, which agrees with the calculated overheating of 3.08°C for the pump conditions under study.

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Funding

The work is supported by the Russian Science Foundation, project no. 19-79-30072.

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Authors and Affiliations

  1. Ioffe Institute, Russian Academy of Sciences, St. Petersburg, Russia

    I. S. Shashkin, A. D. Rybkin, V. A. Kryuchkov, A. E. Kazakova, D. N. Romanovich, N. A. Rudova, S. O. Slipchenko & N. A. Pikhtin

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  1. I. S. Shashkin
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  2. A. D. Rybkin
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  3. V. A. Kryuchkov
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  4. A. E. Kazakova
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  5. D. N. Romanovich
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  6. N. A. Rudova
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  7. S. O. Slipchenko
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  8. N. A. Pikhtin
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Correspondence to I. S. Shashkin.

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Translated by E. Oborin

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Shashkin, I.S., Rybkin, A.D., Kryuchkov, V.A. et al. Heating Dynamics of the Active Region of High-Power Semiconductor Lasers (λ = 1060 nm) with an Ultra-Wide Aperture (800 µm) in the Quasi-CW Mode. Bull. Lebedev Phys. Inst. 50 (Suppl 1), S18–S24 (2023). https://doi.org/10.3103/S1068335623130122

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