Abstract
There has recently been much interest in the production of blue and blue/green laser radiation from compact diode-pumped solid-state lasers for, amongst others, applications in the fields of optical data storage, undersea communications, and laser displays. Sum-frequency generation between the pump and intracavity field of a diode-pumped neodymium laser is one of several techniques that has been used to generate wavelengths in this spectral region.1,2 This technique was initially considered quite attractive for several reasons. First, modulation rates in excess of 1 GHz are possible with direct diode modulation. Second, limited tunability is possible by tuning the wavelength of the pump diode. Finally, the 1064/810-nm sum-frequency laser is based on commonly available gain and nonlinear optical crystals (Nd:YAG and KTP). Unfortunately, the conversion efficiency of this class of device is significantly lower than that possible with other techniques.
© 1991 Optical Society of America
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