3 May 2001 Toward a 1.54 μm frequency standard with Er-Yb (13C2H2)
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Abstract
A novel Er-Yb:glass quasi-monolithic diode-pumped laser has been developed to realize a high-accuracy frequency standard at 1.54 micrometer based on saturated absorption of isotopic acetylene. This compact oscillator shows low amplitude- and frequency-noise, wide wavelength tunability (approximately 20 nm), and continuous output power in excess of 20 mW with excellent linear polarization (approximately 30 dB extinction ratio). Employing this laser source sub-Doppler spectroscopy of the acetylene around 1.54 micrometer has been performed. To obtain the necessary saturation intensity (approximately 3.5 W/mm2), the absorbing sample is placed inside a Fabry- Perot cavity with a Finesse of approximately 150. The dispersion signal of the sub-Doppler resonance, useful to stabilize the laser frequency, has been obtained by dithering the Fabry-Perot piezo and employing a lock-in detection scheme.
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Gianluca Galzerano, Gianluca Galzerano, Cesare Svelto, Cesare Svelto, Atsushi Onae, Atsushi Onae, Elio Bava, Elio Bava, } "Toward a 1.54 μm frequency standard with Er-Yb (13C2H2)", Proc. SPIE 4269, Laser Frequency Stabilization, Standards, Measurement, and Applications, (3 May 2001); doi: 10.1117/12.424475; https://doi.org/10.1117/12.424475
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