Investigation of the coherence properties of radiation in active optical systems utilizing copper vapor amplifiers

An experimental investigation was made of the coherence properties of the radiation in active optical systems utilizing copper vapor amplifiers. The radiation emitted by a UL-102 active element was studied. The radiation of wavelength 0.51 μm (the green component) was found to have a coherence length of 22 cm, while for the 0.57-μm radiation (the yellow component) the coherence length was 44 cm. The coherence radii for the spectral components in the near-field zone were 3 mm for λ₁ = 0.51 μm and 5mm for λ₂ = 0.57 μm.