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Brief Communications

Some characteristics of near-infrared He–Ne laser radiation

V. A. Kasel'skiĭ, E. P. Ostapchenko, A. I. Ryabov, V. A. Stepanov


Abstract: Stimulated emission was obtained from a small (resonator length ~0.5 m) prototype He–Ne laser emitting simultaneously at wavelengths of 1.0798, 1.1614, and 1.1985 μ (common upper level 2S₂), at 1.0844, 1.1523, and 1.1767 μ (common upper level 2S₂), and at 3.3913 μ with an upper level 3S₂. Competition between the transitions coupled by common energy levels was observed. The output power of each of the competing transitions varied periodically and the period was Δ L = λ₁λ₂/2(λ₁ – λ₂). Waveguide emission at wavelengths of 1.15 and 3.39 μ was observed in a resonator with large diffraction losses.

UDC: 621.373.8.038.823

PACS: 42.60.Cz

Received: 17.10.1975
Revised: 10.02.1976

 English version: Soviet Journal of Quantum Electronics, 1976, 6:8, 992–994