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Second-harmonic average power and conversion efficiency versus fundamental power for a 2 mm PPKTP crystal at 423 nm.
Group velocity mismatch and the corresponding spectral acceptance bandwidth for SHG in PPKTP.
Spectral acceptance for SHG in a 2 mm PPKTP crystal at a room-temperature fundamental wavelength of 845 nm.
Angular acceptance for SHG in 2 mm PPKTP crystal at a second-harmonic wavelength of 423 nm.
Cross-correlation intensity profile between the fundamental and second-harmonic pulses in a 500 μm crystal at 423 nm.
(a) Nonperiodic grating structure in a 2 mm PPKTP crystal for enhanced spectral acceptance and reduced GVM, and (b) the corresponding gain profile compared with the function for a periodic grating.
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