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Title: Note: Longitudinally excited N{sub 2} laser with low beam divergence

We developed a longitudinally excited N{sub 2} laser (337 nm) with low beam divergence without collimator lenses. The N{sub 2} laser consisted of a 30 cm long Pyrex glass tube with an inner diameter of 2.5 mm, a normal stable resonator formed by flat mirrors, and a simple, novel driver circuit. At a N{sub 2} gas pressure of 0.4 kPa and a repetition rate of 40 Hz, the N{sub 2} laser produced a circular beam with an output energy of 2.6 μJ and a low full-angle beam divergence of 0.29 mrad due to the uniform discharge formed by the longitudinal excitation scheme, the long cavity with the small aperture, and the low-input energy oscillation.
Authors:
;  [1] ;  [2]
  1. Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi 400-8511 (Japan)
  2. Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871 (Japan)
Publication Date:
OSTI Identifier:
22314696
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; BEAMS; CAVITY RESONATORS; COLLIMATORS; EXCITATION; LASERS; LENSES; MIRRORS; NITROGEN; OSCILLATIONS; PYREX; TUBES