Demonstration of an all-fiber ultra-low numerical aperture ytterbium-doped large mode area fiber in a master oscillator power amplifier configuration above 1 kW power level

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buir.contributor.authorMidilli, Yakup
buir.contributor.authorOrtaç, Bülend
dc.citation.epage1920en_US
dc.citation.issueNumber7en_US
dc.citation.spage1915en_US
dc.citation.volumeNumber38en_US
dc.contributor.authorMidilli, Yakup
dc.contributor.authorOrtaç, Bülend
dc.date.accessioned2021-02-18T12:04:30Z
dc.date.available2021-02-18T12:04:30Z
dc.date.issued2020
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.description.abstractWe demonstrate an all-fiber ultra-low numerical aperture high power fiber laser system operating in the continuous-wave regime at a central wavelength of 1080 nm. A special Ytterbium-doped fiber preform has been designed and fabricated by using modified chemical vapor deposition technique with the deposition percentages of 0.03mol% of Yb2O3, 1.8mol% of Al2O3, and 2.1mol% of P2O5. Then it has been drawn to obtain an active fiber having core/cladding diameters of 26 μm/410 μm respectively. The numerical aperture of the fiber has been first predicted as 0.034 from refractive index profile of the preform. Afterward, this number has been verified with a simple test setup by altering the bending diameter of the fiber and the excitation conditions of it. To test the high power performance, a laser system has been constructed in a master oscillator power amplifier configuration, and ~ 80 W seed signal power is amplified to 1.05 kW. The quality of the laser output beam has been measured in terms of M 2 value along both x and y coordinates as 1.11 and 1.16 respectively.en_US
dc.description.provenanceSubmitted by Onur Emek (onur.emek@bilkent.edu.tr) on 2021-02-18T12:04:30Z No. of bitstreams: 1 Demonstration_of_an_All-Fiber_Ultra-Low_Numerical_Aperture_Ytterbium-Doped_Large_Mode_Area_Fiber_in_a_Master_Oscillator_Power_Amplifier_Configuration_Above_1_kW_Power_Level.pdf: 1958316 bytes, checksum: c89db07278770b4cf934f6c0f6d6fd26 (MD5)en
dc.description.provenanceMade available in DSpace on 2021-02-18T12:04:30Z (GMT). No. of bitstreams: 1 Demonstration_of_an_All-Fiber_Ultra-Low_Numerical_Aperture_Ytterbium-Doped_Large_Mode_Area_Fiber_in_a_Master_Oscillator_Power_Amplifier_Configuration_Above_1_kW_Power_Level.pdf: 1958316 bytes, checksum: c89db07278770b4cf934f6c0f6d6fd26 (MD5) Previous issue date: 2020en
dc.description.sponsorshipThis work was supported in part by The Scientific and Technological Research Council of Turkey (TUBİTAK)en_US
dc.identifier.doi10.1109/JLT.2020.2970213en_US
dc.identifier.issn0733-8724
dc.identifier.urihttp://hdl.handle.net/11693/75460
dc.language.isoEnglishen_US
dc.publisherIEEEen_US
dc.relation.isversionofhttps://dx.doi.org/10.1109/JLT.2020.2970213en_US
dc.source.titleJournal of Lightwave Technologyen_US
dc.subjectLow numerical apertureen_US
dc.subjectMOPA configurationen_US
dc.subjectOptical fiber fabricationen_US
dc.subjectOptical fibersen_US
dc.subjectOptical fiber lasersen_US
dc.subjectSpecialty fibersen_US
dc.titleDemonstration of an all-fiber ultra-low numerical aperture ytterbium-doped large mode area fiber in a master oscillator power amplifier configuration above 1 kW power levelen_US
dc.typeArticleen_US

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