Patent ID: 7173754

Claim:
An OPO apparatus comprising: a) a source of optical radiation; b) an optically nonlinear medium that receives a pump beam of optical radiation having a first frequency Ï‰ 3 , to thereby generate a signal beam having a frequency Ï‰ 1 , and an idler beam having a frequency Ï‰ 2 such that Ï‰ 1 +Ï‰ 2 =Ï‰ 3 , wherein said nonlinear medium has opposing first and second faces separated by a distance L; c) a resonant optical cavity containing the nonlinear medium in which cavity at least the signal beam resonates d) at least one phasor for receiving and adjusting the phase of the resonating beam or beams, wherein said at least one phasor is disposed within said resonant optical cavity.