Noise suppression using pump-resonant optical parametric oscillation
US6456424B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2000 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | May 17, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/39
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A pump resonant optical parametric oscillator (PROPO) is optimized for noise suppression of pump radiation of wavelength &lgr;p. The PROPO generally comprises a parametric amplifier disposed within a resonant cavity having input and output couplers. The parametric amplifier has a gain G that increases with increasing power at a pump wavelength &lgr;p. The cavity resonates at both pump wavelength &lgr;p and signal wavelength &lgr;s. The parametric amplifier transfers noise on the pump radiation to the signal radiation. Input coupler transmission TIC, output coupler pump transmission TP, signal transmission TS, and gain G are chosen such that a resonated pump power at &lgr;p is nearly clamped at a threshold level. By setting these parameters such that the PROPO has a threshold slightly lower than the available power at a wavelength of the optical pump, noise on the pump radiation may be reduced by greater than about a factor of 10. The same principle may be applied to a PROPO having two parametric amplifiers to suppress noise on a signal radiation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.