Direct frequency doubling of laser diodes is an attractive method for obtaining short wavelength coherent light in the blue spectral region.1-2 However, to directly frequency convert to the UV region using bulk nonlinear crystals such as KNbO3, extremely low temperatures are needed for phase matching. We have achieved picosecond UV pulse generation at room temperature by direct frequency doubling in a proton exchanged MgO:LiNbO3 waveguide of a gain switched GaAlAs laser diode.

© 1990 Optical Society of America

PDF Article


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access OSA Member Subscription