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Power-boosted difference-frequency source for high-resolution infrared spectroscopy

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We analyzed the spectroscopic performance of a difference-frequency source that utilizes a 5-W Yb-fiber amplifier for the “signal” radiation in order to increase the “idler” power generated around 4.3 μm. The amplifier is seeded by a monolithic-cavity Nd:YAG laser at 1064 nm. The intensity noise spectral density of the “idler” radiation was characterized. Cavity-enhanced saturated-absorption spectroscopy was also performed to test the frequency resolution. In particular, we observed the Lamb-dip spectrum of the ro-vibrational (0000-0001)R(0)transition of 17O12C16O in natural abundance. To our knowledge, this is the first observation of that transition by the Lamb-dip technique.

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Received: 19 December 2002 / Revised version: 3 February 2003 / Published online: 16 April 2003


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Borri, S., Cancio, P., De Natale, P. et al. Power-boosted difference-frequency source for high-resolution infrared spectroscopy . Appl Phys B 76, 473–477 (2003).

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