Experimental and numerical studies of single-mode laser operation in unstable resonator with semitransparent output coupler and intracavity astigmatism

Autor:	Alexander Anatolievich Shepelenko, Pavel A. Mikheyev, Nikolay V. Kupryaev
Rok vydání:	1996
Předmět:	Physics business.industry Plane symmetry Single-mode optical fiber Physics::Optics Near and far field Output coupler Astigmatism Laser medicine.disease law.invention Resonator Optics law medicine Optoelectronics Fresnel number business
Zdroj:	SPIE Proceedings.
ISSN:	0277-786X
DOI:	10.1117/12.236897
Popis:	The possibility and conditions of single mode laser operation for lasers with resonator Fresnel number up to 10 and substantial intracavity astigmatism employing unstable resonator with uniform semitransparent output coupler (URUSC) have been investigated experimentally. The influence of astigmatism may be significant in multipass resonators with spherical folding mirrors. The experimental condition of single mode operation in URUSC was for the resonator to be in an unstable region if only for one plane of symmetry determined by astigmatism. At the same time in the other plane the resonator might be stable. Comparison of the far field measurements with numerical simulations was performed. It revealed that even if equivalent Fresnel number in `unstable plane' was greater than unit the laser operation was still single mode.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::eac685a8737d63ed9eedce955dc880be https://doi.org/10.1117/12.236897 Zobrazit plný text záznamu