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- Title
Ld-pumped low-coherent Nd:YVO<sub>4</sub> and Nd:YAG lasers.
- Authors
Koromyslov, Alexey L.; Senatsky, Yury V.
- Abstract
Lasers of low-coherence have attracted the attention of researches since the first publications on this topic in the 1960s and up to the present time. Low-coherent quasi-continuous LD-pumped Nd:YVO4 and Nd:YAG lasers with ≈ 1 ms pulses of 1064 nm radiation at 10 Hz repetition rate and 21–47 W output power are reported. Spatial coherence of laser radiation was determined by the contrast C of speckle patterns, C = 0.02 - 0.1. These Nd-lasers optical efficiency is in the range 20%–50% (depending on the coherence level). The low coherence was obtained at multimode lasing in a plano-spherical resonator near its stability limit. Experimental data are commented on using the calculated dependences of the number of laser modes and the degree of coherence on resonator configurations and pump spot sizes. The achieved contrast values C < 0.03 are below the level of human perception and correspond to the level of spatial coherence typical for thermal sources of radiation. Possible applications of the developed low-coherent multimode Nd-lasers and directions for further research are discussed.
- Subjects
SPECKLE interference; LASER beams; RADIATION sources; HEAT radiation &; absorption; Q-switched lasers; MODE-locked lasers; RESONATORS; ND-YAG lasers
- Publication
Applied Physics B: Lasers & Optics, 2024, Vol 130, Issue 6, p1
- ISSN
0946-2171
- Publication type
Article
- DOI
10.1007/s00340-024-08232-x