T F Wu, Y J Yang, C Y Li, C Q Xia, J B Han, Y W Gao, L Zhang
{"title":"All-fiber polarization-maintained figure-9 laser with frequency locking at a repetition rate of 247 MHz.","authors":"T F Wu, Y J Yang, C Y Li, C Q Xia, J B Han, Y W Gao, L Zhang","doi":"10.1364/AO.574294","DOIUrl":null,"url":null,"abstract":"<p><p>We report on an all-fiber polarization-maintained (PM) erbium-based nonlinear amplifying loop mirror mode-locked laser (figure-9). Due to a hybrid optical element, the laser can be operated in a simple and compact configuration with a high repetition rate reaching up to 247 MHz. By balancing the length of the Er-doped active fiber and the PM-1550 passive fiber, the cavity dispersion was designed to be near zero to negative. The central wavelength was centered at 1567 nm with a 3 dB bandwidth of 26.3 nm. The pulse duration was measured to be 245 fs. Further, the fundamental repetition frequency was locked to a stable radio reference. The Allan deviation for frequency stability was calculated to be 3.146×10<sup>-12</sup> at 1 s' gate time. To our knowledge, this is the highest repetition rate for all-fiber figure-9 structure mode-locked lasers.</p>","PeriodicalId":101299,"journal":{"name":"Applied optics","volume":"64 27","pages":"8019-8025"},"PeriodicalIF":0.0000,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied optics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1364/AO.574294","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
We report on an all-fiber polarization-maintained (PM) erbium-based nonlinear amplifying loop mirror mode-locked laser (figure-9). Due to a hybrid optical element, the laser can be operated in a simple and compact configuration with a high repetition rate reaching up to 247 MHz. By balancing the length of the Er-doped active fiber and the PM-1550 passive fiber, the cavity dispersion was designed to be near zero to negative. The central wavelength was centered at 1567 nm with a 3 dB bandwidth of 26.3 nm. The pulse duration was measured to be 245 fs. Further, the fundamental repetition frequency was locked to a stable radio reference. The Allan deviation for frequency stability was calculated to be 3.146×10-12 at 1 s' gate time. To our knowledge, this is the highest repetition rate for all-fiber figure-9 structure mode-locked lasers.