The paper presents the study results of the semiconductor laser active medium temperature effect, that changes in time during its operation, on its output spectral characteristics. Experimental dependences of the diode laser emission spectra on the laser crystal temperature in the range from 296 to 320 K are investigated. Using a heat fluxes computer model the possible reasons were analyzed for the time variation of the laser diode module spectral characteristics with several single emitters that are fixed on the ladder platform. The obtained results can be used for the large-scale laser diode modules design, including a large number of emitters, with high requirements for the output characteristics stability. Thermal fields and isothermal surfaces for a laser diode module with total thermal loads exceeding 30 W are studied.
At the same time, he worked as a member of the scientific staff in the Division of Heat Engineering at the Leningrad Technical Physics Laboratory (afterwards the Polzunov Central Boiler and Turbine Institute).The basis of Soviet physical heat engineering was being laid at that time, and he took a very active part in it. In 1941, while retaining his links with the Polzunov Institute, he transferred from Leningrad Polytechnic Institute to the Dzerzhinskii Higher Naval-Engineering College, where for more than 30 years he headed the Department of the Theoretical Principles of Heat Engineering.
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