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We have developed and characterized an original optical frequency standard based on the IR absorption line R(3) of the HI molecule. Accurate FM-spectroscopy of hydrogen iodide was performed by an extended cavity laser diode (ECLD). By the FM sideband technique we achieved absolute frequency stabilization of the ECLD to the absorption line central frequency of 194.536 THz. The novelty of this work...
An external-cavity laser diode was frequency locked on the molecular absorption line R(3) of hydrogen iodide at 1.541 mum using the wavelength-modulation technique. Stabilization is realized by means of two feedback loops acting on two different frequency ranges. Measurements of the closed-loop error signal provided a relative frequency stability of a few parts in 10-10 in a 50-kHz acquisition bandwidth.
An Extended-Cavity Laser Diode was used to perform high resolution spectroscopy of molecular absorption lines of hydrogen iodide. For the first time, this laser source was frequency locked to an HI transition at 1.5 μm using the wavelength modulation technique. Preliminary measurements of the closed-loop error signal provided a relative frequency stability of 2 × 10<sup>−9</sup>in...
An extended-cavity laser diode was used to perform high resolution spectroscopy of molecular absorption lines of hydrogen iodide. For the first time, this laser source was frequency locked to an HI transition at 1.5 mum using the wavelength modulation technique. Preliminary measurements of the closed-loop error signal provided a relative frequency stability of' 2times10-9 in a 10 Hz acquisition bandwidth
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