Multiple spot mirrors as total reflectors inside stable XeCl laser cavities

Antonella Rizzo; Praveen Aghamkar; Ferdinando De Tomasi; Maria Rita Perrone; Maria Lucia Protopapa; Salvatore Scaglione

doi:10.1117/12.527568

19 November 2003 Multiple spot mirrors as total reflectors inside stable XeCl laser cavities

Antonella Rizzo, Praveen Aghamkar, Ferdinando De Tomasi, Maria Rita Perrone, Maria Lucia Protopapa, Salvatore Scaglione

Proceedings Volume 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life; (2003) https://doi.org/10.1117/12.527568
Event: 19th Congress of the International Commission for Optics: Optics for the Quality of Life, 2002, Florence, Italy

Abstract

Multiple spot mirrors are non-conventional optical components which present a number of equally spaced circular spots with a high reflectance that decreases to zero outside the spots. It is believed that the use of multiple spot mirrors as full reflectors in plane-parallel laser cavities should allow to improve the laser beam optical quality and get a good fillimg of the active medium. A double-spot mirror and a four-spot mirror for a XeCl laser cavity (λ = 308 nm) have been fabricated by depositing HfO₂ and SiO₂ thin films by reactive ion beam sputtering. The design employed allows to obtain a maximum reflectance (79%) on the spot area and a reflectance lower than 0.5% outside the spots by shaping the thickness of one of the inner layer. To this aim, a properly shaped mask was put inside the vacuum chamber during the deposition of the graded layer. The realization and the optical characterization of these devices are presented in this paper.

Citation Download Citation

Antonella Rizzo, Praveen Aghamkar, Ferdinando De Tomasi, Maria Rita Perrone, Maria Lucia Protopapa, and Salvatore Scaglione "Multiple spot mirrors as total reflectors inside stable XeCl laser cavities", Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); https://doi.org/10.1117/12.527568

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KEYWORDS

Mirrors

Reflectivity

Reflectors

Gas lasers

Laser resonators

Optical components

Ion beams

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