Graded-phase mirror resonator with super-Gaussian output in a CW-CO[sub 2] laser

Journal Article · Tue Nov 01 04:00:00 EST 1994 · IEEE Journal of Quantum Electronics (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/3.333723· OSTI ID:7032997

Neste, R V; Pare, C; Lachance, R L; Belanger, P A ^[1]

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1. Univ. Laval, Sainte-Foy, Quebec (Canada)

Two graded-phase mirror (GPM) resonators have been designed to produce super-Gaussian output beam profiles of order 4 and 6. An inverse propagation method was used to calculate the appropriate shape of the GPM's. Previous experimental work with a pulsed TEA-CO[sub 2] laser has already confirmed the high transverse mode discrimination offered by such custom resonators, as anticipated by a theoretical analysis of their diffractional properties. Here, the authors extend these results by presenting new experimental measurements with a CW-CO[sub 2] laser. The main objective of this paper is to demonstrate the super-Gaussian beam shape produced by these custom resonators. This is assessed with numerical simulations involving the incoherent superposition of transverse modes. The experimental results obtained with the GPM resonators, including measurements of the propagation of the output beam profile, are compared to those of a conventional semiconfocal cavity, and show higher monomode power extraction.

• OSTI ID: 7032997
• Journal Information: IEEE Journal of Quantum Electronics (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Journal of Quantum Electronics (Institute of Electrical and Electronics Engineers); (United States) Vol. 30:11; ISSN 0018-9197; ISSN IEJQA7
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426002* -- Engineering-- Lasers & Masers-- (1990-)
BEAM PROFILES
CARBON DIOXIDE LASERS
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ELECTROMAGNETIC RADIATION
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EQUIPMENT
EXPERIMENTAL DATA
GAS LASERS
INFORMATION
LASER CAVITIES
LASER MIRRORS
LASER RADIATION
LASERS
MIRRORS
NUMERICAL DATA
RADIATIONS
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