Manufacturing method for QPM wavelength converter elements, QPM wavelength converter element, and medical laser apparatus using it
US7878205B2 · kind B2 · utility
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3Claims
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Key dates
| Filing date | Oct 5, 2007 |
| Grant date | Feb 1, 2011 |
| Priority date | — |
| Expiry date | Nov 10, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B18/20
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A manufacturing method for quasi phase matching (QPM) wavelength converter elements using crystal quartz as a base material in which twins are periodically induced, comprises a step of periodically inducing the twins by applying a stress onto a crystal quartz substrate as the base material so that an angle θ of a direction in which the stress is applied relative to a Z axis of the crystal quartz is 60°<θ<90°.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.