Patent ID: 7447245

Claim:
Optical apparatus, comprising: an OPS laser resonator including an OPS-structure, the OPS-structure including a mirror-structure and a multilayer semiconductor gain-structure the OPS laser resonator having a resonator-axis folded at least once by a fold-mirror; an arrangement for energizing the gain-structure of the OPS-structure of the OPS laser resonator thereby causing radiation having a fundamental wavelength to circulate in the OPS laser resonator; an OPO resonator having an OPO resonator axis folded by a polarizing beamsplitter, a portion of the OPS laser resonator axis and the OPO resonator axis being coaxial; and an optically nonlinear crystal located in the coaxial portion of the OPS laser and OPO resonators and arranged to frequency divide fundamental wavelength radiation circulating in the OPS laser resonator.