We report high resolution sub-Doppler spectroscopy of molecular iodine hyperfine transitions around 541 nm. A novel solid state source, based on a diode laser, a Yb+ fiber amplifier and a periodically-poled KTiOPO4 crystal, was developed, having a continuous tunability range of 1.2 THz. The performance of this crystal for doubling 1083 nm laser radiation is demonstrated for the first time, as well as the use of a broad band Yb-doped fiber amplifier for Doppler-free spectroscopy. Preliminary results for the frequency stability of the 1083 nm diode laser locked to an iodine hyperfine line are reported. This source can be used as a compact frequency standard for precision measurements of the atomic helium and determination of the fine structure constant alpha. (C) 2000 Elsevier Science B.V. All rights reserved.
Sub-Doppler spectroscopy of molecular iodine around 541 nm with a novel solid state laser source
De Natale P;Giusfredi G;
2000
Abstract
We report high resolution sub-Doppler spectroscopy of molecular iodine hyperfine transitions around 541 nm. A novel solid state source, based on a diode laser, a Yb+ fiber amplifier and a periodically-poled KTiOPO4 crystal, was developed, having a continuous tunability range of 1.2 THz. The performance of this crystal for doubling 1083 nm laser radiation is demonstrated for the first time, as well as the use of a broad band Yb-doped fiber amplifier for Doppler-free spectroscopy. Preliminary results for the frequency stability of the 1083 nm diode laser locked to an iodine hyperfine line are reported. This source can be used as a compact frequency standard for precision measurements of the atomic helium and determination of the fine structure constant alpha. (C) 2000 Elsevier Science B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
