Inspection System Using 193nm Laser
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United States of America Patent
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Aug 10, 2017
app pub date -
Apr 24, 2017
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May 22, 2012
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Abstract
Laser and inspection systems that generate laser output light at sub-200 nm wavelengths using fundamental light at approximately 1064 nm. A second harmonic generator module generates second harmonic light directed to both an optical parametric (OP) module, which generates down-converted signal (idler light), and to a fifth harmonic generator module, which generates fifth harmonic light. The OP module includes an optical parametric oscillator that is configured to generate the idler signal at approximately 0.5 times the fundamental frequency. The idler light and fifth harmonic light are then mixed by a frequency mixing module to generate the laser output light having an output frequency equal to approximately 5.5 times the fundamental frequency.
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