Infrared‐pumped third‐harmonic and sum‐frequency generation in diatomic molecules
作者:
C. Y. She,
Kenneth W. Billman,
期刊:
Applied Physics Letters
(AIP Available online 1975)
卷期:
Volume 27,
issue 2
页码: 76-79
ISSN:0003-6951
年代: 1975
DOI:10.1063/1.88359
出版商: AIP
数据来源: AIP
摘要:
Using molecular hydrogen as a model system, we present the first calculation which demonstrates the feasibility of efficient third‐harmonic and sum‐frequency generation of ir laser radiation by diatomic molecular gases. A conversion efficiency of 10% without phase matching is achievable with a modest laser intensity of about 20 MW/cm2. In addition to a two‐photon resonance, the efficient conversion depends on a mechanism which makes use of virtual vibronic transitions exclusively. Possible methods for phase matching are also suggested.
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