We report the experimental realization of a new type of optical parametric oscillator in which oscillation is achieved by polarization rotation in a linear retarder, followed by nonlinear polarization mixing. The mixing is performed by a type II degenerate parametric downconversion in a periodically poled KTP crystal pumped by a 1064 nm pulsed Nd:YAG pump. A single, linearly polarized beam, precisely at the degenerate wavelength is generated. The output spectrum has a narrow linewidth (below the instrumentation bandwidth of 1 nm) and is highly stable with respect to variations in the crystal temperature.
© 2005 Optical Society of America
Gal Kalmani, Ady Arie, Pinhas Blau, Shaul Pearl, and Arlee V. Smith, "Polarization-mixing optical parametric oscillator," Opt. Lett. 30, 2146-2148 (2005)