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Atmospheric and Oceanic Optics

2014 year, number 12

Pulse–frequency modulation of CuBr laser emission

F. A. Gubarev1,2, G. S. Evtushenko1
1National Research Tomsk Polytechnic University, 634050, Tomsk, Lenina ave., 30
2V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
Keywords: metal-vapor laser, copper–bromide laser, optical communication, wireless communication, over–the–horizon link, pulse–frequency modulation

Abstract

This paper presents the results of study of CuBr laser operation in a mode of pulse–frequency modulation of lasing. This modulation method can be used for implementation of atmospheric bistatic optical communication links. Modulation has been performed in accordance with a digital code coming from a personal computer. Experimental results are presented illustrating the effect of the transmitted digital code on the lasing pulse energy at different carrier frequencies and deviation of the pulse repetition period from the period of the carrier frequency. It is shown that, depending on the mode of laser operation, a significant (up to 17 %) variation of lasing energy can be observed when transmitting logical “0” and 1.