{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T11:11:42Z","timestamp":1753873902692,"version":"3.41.2"},"reference-count":41,"publisher":"AIP Publishing","issue":"1","funder":[{"name":"DGAPA-PAPIIT UNAM","award":["IN111818"],"award-info":[{"award-number":["IN111818"]}]}],"content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2019,1,1]]},"abstract":"<jats:p>In this work, we define the efficiency signal conversion numerical parameter, Veff, useful to evaluate the operation efficiency of femtosecond-Optical Parametric Oscillator (fs-OPO) cavities considering the astigmatism effect. For the validation of the Veff, we have performed experimental measurements. We present different high efficiency home-made singly resonant fs-OPO cavities, with signal tuneability from 1.1 \u00b5m to 1.6 \u00b5m based on a 0.5 mm Periodically Poled Lithium Niobate doped with MgO (MgO:PPLN) crystal. We have also defined the pump energy threshold per crystal unit length, \u03b6p,th. Pump threshold, achieved by following the Veff, was 142 mW at 810 nm, and \u03b6p,th = 2.10 nJ\/mm, the lowest value, in comparison with other studies. The Veff is based on an ABCD matrix Gaussian beam propagation method, which calculates the mode coupling between the pump and signal beams along the crystal under different cavity configurations taking into account the astigmatism. The model was compared and tested with 3 different experimental singly resonant fs-OPO ring cavity configurations that we have defined as single-folded, two-folded, and direct-pump cavity.<\/jats:p>","DOI":"10.1063\/1.5041966","type":"journal-article","created":{"date-parts":[[2019,1,4]],"date-time":"2019-01-04T19:32:03Z","timestamp":1546630323000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":2,"title":["Efficiency signal conversion parameter to evaluate astigmatic femtosecond-optical parametric oscillator cavities"],"prefix":"10.1063","volume":"90","author":[{"given":"G.","family":"Castro-Olvera","sequence":"first","affiliation":[{"name":"Departamento de \u00d3ptica, Microondas y Ac\u00fastica, Instituto de Ciencias Aplicadas y Tecnolog\u00eda, Universidad Nacional Aut\u00f3noma de M\u00e9xico , Ave. Universidad No. 3000, Col. Universidad Nacional Aut\u00f3noma de M\u00e9xico, Del Coyoac\u00e1n, Ciudad de M\u00e9xico, Mexico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1138-8667","authenticated-orcid":false,"given":"J.","family":"Gardu\u00f1o-Mej\u00eda","sequence":"additional","affiliation":[{"name":"Departamento de \u00d3ptica, Microondas y Ac\u00fastica, Instituto de Ciencias Aplicadas y Tecnolog\u00eda, Universidad Nacional Aut\u00f3noma de M\u00e9xico , Ave. Universidad No. 3000, Col. Universidad Nacional Aut\u00f3noma de M\u00e9xico, Del Coyoac\u00e1n, Ciudad de M\u00e9xico, Mexico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M.","family":"Rosete-Aguilar","sequence":"additional","affiliation":[{"name":"Departamento de \u00d3ptica, Microondas y Ac\u00fastica, Instituto de Ciencias Aplicadas y Tecnolog\u00eda, Universidad Nacional Aut\u00f3noma de M\u00e9xico , Ave. Universidad No. 3000, Col. Universidad Nacional Aut\u00f3noma de M\u00e9xico, Del Coyoac\u00e1n, Ciudad de M\u00e9xico, Mexico"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"317","published-online":{"date-parts":[[2019,1,4]]},"reference":[{"key":"2023070420471649300_c1","doi-asserted-by":"publisher","first-page":"1309","DOI":"10.1364\/josab.20.001309","article-title":"Low-threshold, high-repetition-frequency femtosecond optical parametric oscillator based on chirped-pulse frequency conversion","volume":"20","year":"2003","journal-title":"J. Opt. Soc. Am. 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