Blue light with an average power of as much as 7.5 mW in picosecond pulses has been generated at 486, 488, and 491 nm from a frequency-doubled, nonresonant injection seeded, gain-switched InGaAs/GaAs diode laser by use of a periodically poled KTP waveguide crystal that incorporates a Bragg grating section.
© 2001 Optical Society of America
E. U. Rafailov, D. J. L. Birkin, W. Sibbett, P. Battle, T. Fry, and D. Mohatt, "Efficient frequency doubling of a pulsed laser diode by use of a periodically poled KTP waveguide crystal with Bragg gratings," Opt. Lett. 26, 1961-1962 (2001)