{"title":"Stable L-band single-frequency erbium fiber laser by applying parity-time symmetric sagnac ring design","authors":"Chi-Chin Wu, Wen-Hao Hung, Kuan-Ming Cheng, Lan-Yin Chen, Yu-Ting Lai, Chun-Yen Lin, Tsu-Hsin Wu, Teng-Yao Yang, Chien-Hung Yeh","doi":"10.1016/j.yofte.2025.104180","DOIUrl":null,"url":null,"abstract":"<div><div>A Sagnac ring with parity-time (PT) symmetry design is included to the L-band EDF ring laser to achieve single-longitudinal-mode (SLM) operation. The PT symmetry configuration can cause two opposite lightwave propagation direction to induce the gain and loss effect, when the polarization states of two lightwaves are adjusted by two polarization controllers (PCs) accurately. Once the gain and loss coefficient are greater than coupling coefficient, the SLM output can be reached. Furthermore, the wavelength tunability range, power output, linewidth, optical signal to noise ratio (OSNR) and stability of the EDF Sagnac ring laser presented are experimentally performed.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"91 ","pages":"Article 104180"},"PeriodicalIF":2.6000,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optical Fiber Technology","FirstCategoryId":"94","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1068520025000550","RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
A Sagnac ring with parity-time (PT) symmetry design is included to the L-band EDF ring laser to achieve single-longitudinal-mode (SLM) operation. The PT symmetry configuration can cause two opposite lightwave propagation direction to induce the gain and loss effect, when the polarization states of two lightwaves are adjusted by two polarization controllers (PCs) accurately. Once the gain and loss coefficient are greater than coupling coefficient, the SLM output can be reached. Furthermore, the wavelength tunability range, power output, linewidth, optical signal to noise ratio (OSNR) and stability of the EDF Sagnac ring laser presented are experimentally performed.
期刊介绍：
Innovations in optical fiber technology are revolutionizing world communications. Newly developed fiber amplifiers allow for direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices, and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews.
Optical Fiber Technology: Materials, Devices, and Systems is a new cutting-edge journal designed to fill a need in this rapidly evolving field for speedy publication of regular length papers. Both theoretical and experimental papers on fiber materials, devices, and system performance evaluation and measurements are eligible, with emphasis on practical applications.
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