Songhyun Jo, Kyoungsoo Park, Sungwook Choi, Seul-Lee Lee, J. Jeong, Jihoon Kim, Y. Lee
{"title":"Analysis on output polarization characteristics of fiber comb filters based on polarization-diversity loop structure","authors":"Songhyun Jo, Kyoungsoo Park, Sungwook Choi, Seul-Lee Lee, J. Jeong, Jihoon Kim, Y. Lee","doi":"10.5220/0005635400470050","DOIUrl":"https://doi.org/10.5220/0005635400470050","url":null,"abstract":"The output states of polarization (SOP's) were investigated within the bandwidth of a filter channel (0.8 nm) for a variety of optical fiber comb filters based on polarization-diversity loop structure including a zeroth-order comb filter, first-order Lyot-type and Solc-type comb filters, and a second-order Solc-type comb filter. The output SOP's (SOPout's) of the filters were calculated at a flat-top band operation mode of each filter for four different input SOP's (SOPin's) except for the zeroth-order filter. It was found that the SOPout of each filter had unique dependence on wavelength. Specifically, the SOPout's of first-order and second-order comb filters vary periodically with spectral periods of a channel bandwidth (0.8 nm) and its half (0.4 nm), respectively. If an output linear polarizer is located at the output port of each filter, the specific portion of transmission spectra can be passed or rejected, and the rejected band can be continuously tuned in a limited wavelength range by controlling the SOPin. Moreover, the SOPin can be figured out by analyzing the location of the spectral dip at the output transmission spectra obtained above by using the output polarizer.","PeriodicalId":222009,"journal":{"name":"2016 4th International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115544230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Durán-Sánchez, R. Álvarez-Tamayo, O. Pottiez, B. Ibarra-Escamilla, E. Kuzin, A. Barcelata-Pinzón
{"title":"Hi-Bi Sagnac interferometer application for wavelenght tuning in CW and actively Q-switched Erbium fiber laser","authors":"M. Durán-Sánchez, R. Álvarez-Tamayo, O. Pottiez, B. Ibarra-Escamilla, E. Kuzin, A. Barcelata-Pinzón","doi":"10.5220/0005656402990304","DOIUrl":"https://doi.org/10.5220/0005656402990304","url":null,"abstract":"An experimental analysis for the use of a Sagnac interferometer with high birefringence fiber in the loop as generated laser wavelength tuning device in a ring cavity Erbium-doped fiber laser in continuous wave and pulsed actively Q-switched regimes is presented. The maximal tuning range of ∼26.72 nm depends on the Sagnac interferometer wavelength spectrum period of ∼30.32 nm. The wavelength tuning of the generated laser line is performed by wavelength displacement of Sagnac interferometer spectrum by temperature variations applied on the fiber loop. Experimental results of the laser spectrum in continuous wave and actively Q-switched operations, and Q-switched pulses characteristics are shown.","PeriodicalId":222009,"journal":{"name":"2016 4th International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127894919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}