Open AccessLow-coherence dye laser with an intracavity radiation diffuser
Author(s) -
O. A. Burdukova,
V. A. Konyshkin,
В. А. Петухов,
M. A. Semenov,
Yuri V. Senatsky
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.421066
Subject(s) - optics , cuvette , materials science , laser , radiation , diffuser (optics) , coherence length , coherence (philosophical gambling strategy) , dye laser , optoelectronics , physics , light source , superconductivity , quantum mechanics
Study of a low-coherence dye laser is reported. A cuvette with a 2 mm gap containing a dense mixture (slurry) of LiF crystal granules (70-140 μm) and an immersion liquid with a dye dissolved in it was installed in a double flat mirror cavity as an active element and simultaneously as a diffuser of radiation. The parallel light beam experiences losses in such a cuvette due to refraction at a set of interfaces between solid particles and a liquid in which different parts of the beam are randomly deflected at small angles. Measurements of the loss coefficients, angles of rays' deflection in the cuvette-diffuser were carried out. When this cuvette was pumped by 25 ns pulses of the 2nd harmonic of a Nd:YAG laser, 20 ns pulses of radiation in the region of 550-650 nm with energy ≈1 mJ at a beam divergence 5-80 mrad, and a degree of spatial coherence γ ≲ 0.1 were obtained in slurry with PM567, Rh101 or DCM dyes. The features of spectra and spatial-angular characteristics of these slurry lasers are discussed, tuning of the spatial coherence of radiation is demonstrated. Possible applications of a dye laser with an intracavity diffuser as a source of low-coherence radiation are considered.