<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Jan Hrabina</style></author><author><style face="normal" font="default" size="100%">Martin Hosek</style></author><author><style face="normal" font="default" size="100%">Simon Rerucha</style></author><author><style face="normal" font="default" size="100%">Martin Cizek</style></author><author><style face="normal" font="default" size="100%">Zdenek Pilat</style></author><author><style face="normal" font="default" size="100%">Massimo Zucco</style></author><author><style face="normal" font="default" size="100%">Josef Lazar</style></author><author><style face="normal" font="default" size="100%">Ondrej Cip</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Absolute frequencies of H13C14N hydrogen cyanide transitions in the 1.5-µm region with the saturated spectroscopy and a sub-kHz scanning laser</style></title><secondary-title><style face="normal" font="default" size="100%">Opt. Lett.</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">BF</style></keyword><keyword><style  face="normal" font="default" size="100%">MF</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2022</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Nov</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://opg.optica.org/ol/abstract.cfm?URI=ol-47-21-5704</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">47</style></volume><pages><style face="normal" font="default" size="100%">5704–5707</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The wide span and high density of lines in its rovibrational spectrum render hydrogen cyanide a useful spectroscopic media for referencing absolute frequencies of lasers in optical communication and dimensional metrology. We determined, for the first time to the best of our knowledge, the molecular transitions' center frequencies of the H13C14N isotope in the range from 1526 nm to 1566 nm with 1.3&amp;amp;\#x00A0;×&amp;amp;\#x00A0;10\textminus10 fractional uncertainty. We investigated the molecular transitions with a highly coherent and widely tunable scanning laser that was precisely referenced to a hydrogen maser through an optical frequency comb. We demonstrated an approach to stabilize the operational conditions needed to maintain the constantly low pressure of the hydrogen cyanide to carry out the saturated spectroscopy with the third-harmonic synchronous demodulation. We demonstrated approximately a forty-fold improvement in the line centers' resolution compared to the previous result.&lt;/p&gt;</style></abstract></record></records></xml>