DocumentCode
860072
Title
A 5 kW CW CO2 laser using a novel negative-branch unstable resonator with a phase-unifying output coupler
Author
Takenaka, Yushi ; Kuzumoto, Masaki ; Yasui, Koji
Author_Institution
Mitsubishi Electric Corp., Hyogo, Japan
Volume
28
Issue
9
fYear
1992
fDate
9/1/1992 12:00:00 AM
Firstpage
1855
Lastpage
1858
Abstract
A 5 kW CW CO2 laser using a negative-branch unstable resonator (M =-1.5) is proposed and characterized experimentally. The resonator consists of a stepwise variable reflecting output coupler, called the phase-unifying output coupler, and a total reflector. A 5 kW CW laser beam with diffraction limited quality (2θ=0.45 mrad) is obtained and affected by the focal point in the resonator. The misalignment angle to reduce the laser power to 95% is improved by a factor of 19 compared with a positive-branch unstable resonator (M =1.5) with a phase-unifying output coupler at the same resonator length
Keywords
carbon compounds; gas lasers; laser cavity resonators; optical couplers; 5 kW; CO2; CW CO2 laser; diffraction limited quality; focal point; laser power; misalignment angle; negative-branch unstable resonator; phase-unifying output coupler; stepwise variable reflecting output coupler; total reflector; Apertures; Coatings; Gas lasers; Niobium; Optical coupling; Phase measurement; Power generation; Power lasers; Power measurement; Rotation measurement;
fLanguage
English
Journal_Title
Quantum Electronics, IEEE Journal of
Publisher
ieee
ISSN
0018-9197
Type
jour
DOI
10.1109/3.144476
Filename
144476
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