Efficient laser harmonic generation employing a low-loss external optical resonator
US5027361A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1988 |
| Grant date | Jun 25, 1991 |
| Priority date | — |
| Expiry date | Jun 21, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/3542
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
TEM.sub.OOq laser radiation derived from a diode-pumped ring laser is directed into a faceted member of nonlinear optical material defining either a standing wave or ring monolithic optical resonator to generate harmonic laser radiation. The losses of the optical resonator, exclusive of the conversion loss to the harmonic, are made sufficiently low such that the dominant loss presented to the resonated mode of the optical resonator is the conversion loss to the generated harmonic. The reflectance of the input mirror of the optical resonator is impedance matched to the losses of the resonator including the harmonic conversion loss for optimum conversion efficiency. The length of the nonlinear optical material is shortened to the point where the bulk losses are less than ten times the sum of the surface and mirror losses, yielding conversion efficiencies of greater than 20 percent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.