A nonlinear frequency conversion system includes a first element including a first medium configured to perform type II birefringent phase matching (BPM) of a pump beam to provide corresponding seed beams having at least first and second polarization states. A second element includes a second medium configured to perform quasi phase matching (QPM) of the seed beams. The second element amplifies at least one of the seed beams to provide corresponding output beams, and at least one of the output beams has a predetermined wavelength that is different from the wavelength of the pump beam. The nonlinear frequency conversion system can be implemented in an optical resonator to provide an optical parametric oscillator.
展开▼
