Chinese Journal of Lasers, Volume. 17, Issue 9, 566(1990)
New advance of high power single frequency He-Ne lasers
26mW stable single frequency output was obtained from an extracavity He -Ne laser of 1m long high gas pressure longitudinally discharge tube with additional unhomogenieous magnetic field. Conversion coeffieient from multi-frequency into single frequency output is greater than 1. This type of laser has a p.d value of approximate constant, being 10-13.
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[in Chinese]. New advance of high power single frequency He-Ne lasers[J]. Chinese Journal of Lasers, 1990, 17(9): 566
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