|
Lasers
High-power multimode semiconductor lasers (976 nm) based on asymmetric heterostructures with a broadened waveguide and reduced vertical divergence
S. O. Slipchenko, A. A. Podoskin, D. N. Nikolaev, V. V. Shamakhov, I. S. Shashkin, M. Kandratov, I. Gordeev, A. E. Grishin, A. E. Kazakova, P. S. Gavrina, K. Bakhvalov, P. S. Kop'ev, N. A. Pikhtin Ioffe Institute, St. Petersburg
Abstract:
The effect of the active region design on the vertical far field divergence of high-power semiconductor lasers based on asymmetric heterostructures with a broadened waveguide of 4 μm thickness, with one (SQW) and two (DQW) InGaAs quantum wells is studied. It is shown that the number of quantum wells has a significant effect on the divergence, that is determined by the angle containing 95 % of the radiated power (Θ95%). The beam divergence at the half-maximum level of 12.9° for asymmetric heterostructures with the SQW active region is demonstrated. It is experimentally shown that the change-over to the DQW from the SQW design of the active region leads to the increase in the value of Θ95% from 23.2° to 41.8°. For both types of the structures the internal optical losses and the internal quantum efficiency of 0.27 cm–1 and 99 %, respectively, is demonstrated. Basing on asymmetric heterostructures with the active SQW region we demonstrate high-power semiconductor lasers emitting the power of 9 W in the continuous mode at the temperature and pump current: 25 °C/10 A, 55 °C/11.4 A.
Keywords:
high-power semiconductor lasers, vertical far field divergence, active region design, angle containing 95 % of the radiated power.
Received: 09.11.2022 Revised: 13.02.2023
Citation:
S. O. Slipchenko, A. A. Podoskin, D. N. Nikolaev, V. V. Shamakhov, I. S. Shashkin, M. Kandratov, I. Gordeev, A. E. Grishin, A. E. Kazakova, P. S. Gavrina, K. Bakhvalov, P. S. Kop'ev, N. A. Pikhtin, “High-power multimode semiconductor lasers (976 nm) based on asymmetric heterostructures with a broadened waveguide and reduced vertical divergence”, Kvantovaya Elektronika, 53:5 (2023), 374–378 [Bull. Lebedev Physics Institute, 50:suppl. 9 (2023), S976–S983]
Linking options:
https://www.mathnet.ru/eng/qe18164 https://www.mathnet.ru/eng/qe/v53/i5/p374
|
|