Abstract
Optotechnical methods of stabilizing the spatial position of the output beam of a double-pulse laser under conditions of wedge- and/or lens-shaped thermooptic distortions of solid-state active elements are proposed and investigated. In the master laser, thermal distortions were compensated for using a stable cavity, in which the active medium was located in the region of the center of curvature of a totally reflecting mirror. In the amplifier, a two-pass scheme was applied. It included a return reflector composed of a positive lens, an erecting prism, and a right-angle roof prism. These methods allowed the interval between paired pulses in holographic lasers, which are constructed on the basis of conventional two-lamp pumping systems, to be extended. The pulse separation in the millisecond range (10–3–1 s) is controlled by the time shift in the flash of one of the lamps at the pulse generation within each flash.
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Dashkevich, V.I., Okushko, V.A. Compensating for the Influence of Nonstationary Thermal Distortions of Active Elements on the Position of the Output Beam of a Double-Pulse Laser for Holographic Interferometry. Instruments and Experimental Techniques 47, 80–84 (2004). https://doi.org/10.1023/B:INET.0000017256.63885.5f
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DOI: https://doi.org/10.1023/B:INET.0000017256.63885.5f