Measurement of the intensity of sources of inherent fluctuations in neon-helium lasers

This paper presents the results of studies of the dependence of the intensity of amplitude fluctuation sources on the pumping (discharge current) for single-mode neon-helium lasers, operating at wavelengths of 0.63 and 1.15 microns. The spectral densities of the relative inherent amplitude fluctuations were measured for different discharge currents, spanning the entire lasing region of the lasers. As a result, it was established that the intensity of the source of radiation fluctuations for a laser, operating at a wavelength of 0.63 micron, is practically independent of the discharge current, whereas for a laser, operating at a wavelength of 1.15 microns, the intensity of the fluctuations increases monotonically with an increase in the discharge current.