We demonstrate the possibility of extending the well-established metrological performance of optical frequency-comb synthesizers to the mid-IR region by phase locking the pump and signal lasers of a difference-frequency source to two near-IR teeth of an optical comb. An uncertainty of 800 Hz 共1.1⫻ 10 −11 兲 in the absolute frequencies of CO 2 transitions near 4.2 m has been measured by cavity-enhanced saturated- absorption spectroscopy. Prospects for the creation of a new dense set of high-quality molecular frequency standards in the IR are discussed.
Mazzotti, D., Cancio, P., Giusfredi, G., DE NATALE, P., Prevedelli, M. (2005). Frequency-comb-based absolute frequency measurements in the mid-IR with difference-frequency-based spectrometer. OPTICS LETTERS, 30, 997-999 [10.1364/OL.30.000997].
Frequency-comb-based absolute frequency measurements in the mid-IR with difference-frequency-based spectrometer
PREVEDELLI, MARCO
2005
Abstract
We demonstrate the possibility of extending the well-established metrological performance of optical frequency-comb synthesizers to the mid-IR region by phase locking the pump and signal lasers of a difference-frequency source to two near-IR teeth of an optical comb. An uncertainty of 800 Hz 共1.1⫻ 10 −11 兲 in the absolute frequencies of CO 2 transitions near 4.2 m has been measured by cavity-enhanced saturated- absorption spectroscopy. Prospects for the creation of a new dense set of high-quality molecular frequency standards in the IR are discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
