{"title":"Tailoring the pulse characteristics of LiB<sub>3</sub>O<sub>5</sub>-based femtosecond optical parametric oscillators by temperature tuning.","authors":"Mengke Qin, Songyin Yu, Zhenyu Yang, Zhaowei Zhang","doi":"10.1364/OL.543097","DOIUrl":null,"url":null,"abstract":"<p><p>We show that the phase mismatch in LiB<sub>3</sub>O<sub>5</sub> (LBO) crystals is approximately proportional to the temperature deviation from the phase-matching temperature of crystals. Moreover, a fixed temperature deviation would result in approximately the same amount of phase mismatch over a large range of wavelengths. Based on this, we demonstrate that the pulse characteristics of LBO-based femtosecond optical parametric oscillators (OPOs) can be tailored by simply tuning the crystal temperature. Experimentally, at a temperature deviation of 10°C, nearly transform-limited optical pulses were obtained over a tuning range of 780-910 nm, and at a temperature deviation of -9°C, linearly chirped pulses with broadened spectra were obtained, which were de-chirped to be nearly transform-limited ones outside the cavity. The capability of generating femtosecond pulses with different pulse characteristics and at various wavelengths would benefit many applications, including spectroscopy and Raman microscopy.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"49 24","pages":"7166-7169"},"PeriodicalIF":3.1000,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics letters","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1364/OL.543097","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
We show that the phase mismatch in LiB3O5 (LBO) crystals is approximately proportional to the temperature deviation from the phase-matching temperature of crystals. Moreover, a fixed temperature deviation would result in approximately the same amount of phase mismatch over a large range of wavelengths. Based on this, we demonstrate that the pulse characteristics of LBO-based femtosecond optical parametric oscillators (OPOs) can be tailored by simply tuning the crystal temperature. Experimentally, at a temperature deviation of 10°C, nearly transform-limited optical pulses were obtained over a tuning range of 780-910 nm, and at a temperature deviation of -9°C, linearly chirped pulses with broadened spectra were obtained, which were de-chirped to be nearly transform-limited ones outside the cavity. The capability of generating femtosecond pulses with different pulse characteristics and at various wavelengths would benefit many applications, including spectroscopy and Raman microscopy.
期刊介绍：
The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community.
Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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