Frequency-doubling broadband light in multiple crystals

William J. Alford, Arlee V. Smith
2001 Journal of the Optical Society of America. B, Optical physics  
We compare frequencydoubling of broadband light in a singlenonlinearcrystal with doubling in five crystalswith intercrystaltemporal walk off compensation, and with doubling in five crystalsadjustedfor offsetphasematchingfrequencies.Usinga planewave, dispersivenumericsl model of iiequency doubling we study the bandwidth of the second harmonic and the conversionefficiencyas functions of crystal length and fundamental irradiance. For low irradiance the offset phase matching arrangement has lower
more » ... ficiencythan a single crystal of the same total length but gives a broader second harmonic bandwidth. The walk off compensated arrangement gives both higher conversion efficiency and broader bandwidth than a single crystal. At high irradiance, both multicrystal arrangementsimprove on the single crystal efficiency while maintainingbroad bandwidth.
doi:10.1364/josab.18.000515 fatcat:yuqk2xxoz5hfbpyi2ezvgmfpla