DOUBLE-LAYER SILVER HALIDE INFRARED LIGHT GUIDE Russian patent published in 2024 - IPC G02B6/02 

FIELD: optics.

SUBSTANCE: invention relates to a new class of radiation-resistant silver halide light guides for the infrared (IR) range, as well as for the terahertz region from 0.1 to 10.0 THz, which corresponds to the medium and far IR range of up to 30.0 mcm. Laser and IR fibre optic technologies are closely related to each other, since their combination makes it possible to create fibre lasers and channels for delivery of generated coherent radiation. For these purposes, double-layer, single-layer and photonic-crystal IR light guides are used. Two-layer silver halide infrared light guide includes a core made with diameter of 400.0 mcm from crystals of solid solutions of the composition AgCl_0.25Br_0.75, containing silver iodide, at the following ratio of ingredients in mol.%: solid solution AgCl_0.25Br_0.75 86.0–90.0; silver iodide 14.0–10.0, and a shell made with diameter of 525.0 mcm from the same crystals with the following ratio of ingredients in mol.%: solid solution AgCl_0.25Br_0.75 92.0–6.0; silver iodide 8.0–4.0.

EFFECT: resistance to ultraviolet and beta-radiation with wide range of transmission in IR and THz region from 3 to 27 mcm with optical loss at wavelength of CO₂ laser (10,6 mcm) — up to 0,18 dB/m.

1 cl, 1 dwg, 3 ex