Abstract
Potassium titanyl phosphate (KTP) is widely utilized for frequency doubling Nd:YAG lasers at 1.064 μm. One problem with the use of KTP at this wavelength is that phase matching is possible only by Type II angle, tuning, so that walk-off of the ordinary and extraordinary beams inside the crystal limits its utility in situations involving high finesse resonators. However, by working at 1.08 μm with an n-cut KTP crystal, one can achieve Type II noncritical phase matching,1 thus eliminating walk-off problems.
© 1992 Optical Society of America
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