Broadband frequency conversion

Nicolai Højer Sanders, Ole Bjarlin Jensen, Jeppe Seidelin Dam, Peter Tidemand-Lichtenberg, Christian Pedersen

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    We demonstrate a method for frequency conversion of broadly tunable or broad bandwidth light in a static, passive setup. Using simple optical components like lenses, mirrors and gratings and a BiBO crystal as the nonlinear material, we are able to frequency double a single-frequency, tunable, external cavity diode laser in the 1020-1090 nm range into the 510-545 nm range with almost equal efficiency for all wavelengths. Phase matching is obtained as follows; a diffraction grating is used to disperse light at different wavelengths into different angles, followed by an appropriately selected lens that ensures phase matching over a broad spectral range in the BBO crystal. Since the tuning mechanism relies on all-passive components with extremely short response times the proposed method is well suited for short pulse, broad bandwidth laser sources like mode-locked lasers or super-continuum sources The method is generic and can be extended to cover other wavelength ranges with a suitable choices of lenses, gratings and nonlinear material.
    Original languageEnglish
    Publication date2012
    Number of pages1
    Publication statusPublished - 2012
    EventNorthern Optics 2012 - Conference Centre Comwell Borupgaard, Snekkersten, Denmark
    Duration: 19 Nov 201221 Nov 2012


    ConferenceNorthern Optics 2012
    LocationConference Centre Comwell Borupgaard
    Internet address


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