High-power, high-repetition-rate, Yb-fiber laser based femtosecond source at 355 nm

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dc.contributor.author Apurv Chaitanya, N.
dc.contributor.author Aadhi, A.
dc.contributor.author Jabir, M. V.
dc.contributor.author Samanta, Goutam Kumar
dc.date.accessioned 2015-10-25T11:57:03Z
dc.date.available 2015-10-25T11:57:03Z
dc.date.issued 2015-09
dc.identifier.citation Apurv Chaitanya, N.; Aadhi, A; Jabir, M. V. and Samanta, Goutam K., “High-power, high-repetition-rate, Yb-fiber laser based femtosecond source at 355 nm”, Optics Letters, DOI: 10.1364/OL.40.004269, vol. 40, no. 18, Sep. 2015. en_US
dc.identifier.issn 1539-4794
dc.identifier.uri http://dx.doi.org/10.1364/OL.40.004269
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/1943
dc.description.abstract We report on the development of a high-power, high-repetition-rate, fiber laser based source of ultrafast ultraviolet (UV) radiation. Using single-pass second-harmonic generation and subsequent sum-frequency generation (SFG) of an ultrafast ytterbium fiber at 1064 nm in 1.2 and 5 mm long bismuth triborate (BIBO) crystals, respectively, we have generated UV output power as high as 1.06 W at 355 nm with single-pass near-infrared-to-UV conversion efficiency of ∼22%. The source has output pulses of temporal and spectral widths of ∼576  fs and 1.6 nm, respectively, at 78 MHz repetition rate. For given crystals and laser parameters, we have experimentally verified that the optimum conversion efficiency of the SFG process requires interacting pump beams to have the same confocal parameters. We also present a systematic study on the power ratio of pump beams influencing the overall conversion of the UV radiation. The UV source has a peak-to-peak short-term power fluctuation of <2.2%, with a power drift of 0.76%/h associated to different loss mechanisms of the BIBO crystal at UV wavelengths. At tight focusing, the BIBO crystal has a broad angular acceptance bandwidth of (∼2  mrad·cm) for SFG of the femtosecond laser en_US
dc.description.statementofresponsibility by N. Apurv Chaitanya and A. Aadhi
dc.format.extent Vol. 40, No. 18
dc.language.iso en_US en_US
dc.publisher OSA Publishing en_US
dc.subject High-power en_US
dc.subject Femtosecond source en_US
dc.subject Ultrafast ultraviolet en_US
dc.subject Sum-frequency generation en_US
dc.subject High-repetition-rate en_US
dc.subject Fiber laser en_US
dc.title High-power, high-repetition-rate, Yb-fiber laser based femtosecond source at 355 nm en_US
dc.type Article en_US
dc.relation.journal Optics Letters

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