Comparison of 127I2-stabilized frequency-doubled Nd: YAG lasers and evaluation of frequency shifts caused by iodine cells

Jan Hrabina; Petr Jedlička; Ondřej Číp; Josef Lazar

doi:10.1117/12.780213

25 April 2008 Comparison of ¹²⁷I₂-stabilized frequency-doubled Nd:YAG lasers and evaluation of frequency shifts caused by iodine cells

Jan Hrabina, Petr Jedlička, Ondřej Číp, Josef Lazar

Author Affiliations +

Proceedings Volume 6995, Optical Micro- and Nanometrology in Microsystems Technology II; 69950O (2008) https://doi.org/10.1117/12.780213
Event: SPIE Photonics Europe, 2008, Strasbourg, France

Abstract

We present results of measurement of purity of a set of iodine cells made at our institute. The purity was tested by improved method based on measurement of induced fluorescence and evaluation by the Stern-Volmer formula. The reproducibility of the fluorescence detection system was improved by introducing of additional compensation for the pumping laser spectral and power instabilities. Frequency-doubled Nd:YAG lasers stabilized with these cells were compared to evaluate their frequency shifts. The absolute frequencies of selected iodine hyperfine transitions were measured in direct laser frequency comparison with the reproducibility well below the kHz level. The results indicating the iodine cell purity are presented with relation to the absolute frequency shifts. This not only highlights the influence of iodine cell quality onto the stability and absolute frequency of laser etalons but also shows the way towards improvements of the iodine cell manufacturing technology.

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Jan Hrabina, Petr Jedlička, Ondřej Číp, and Josef Lazar "Comparison of ¹²⁷I₂-stabilized frequency-doubled Nd:YAG lasers and evaluation of frequency shifts caused by iodine cells", Proc. SPIE 6995, Optical Micro- and Nanometrology in Microsystems Technology II, 69950O (25 April 2008); https://doi.org/10.1117/12.780213

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