Enhanced volume phase grating with high dispersion, high diffraction efficiency and low polarization sensitivity
US6750995B2 · kind B2 · utility
100Cited by
10References
8Claims
0Family size
Inventor
Key dates
| Filing date | Jul 9, 2001 |
| Grant date | Jun 15, 2004 |
| Priority date | — |
| Expiry date | Jul 9, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/4244
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An enhanced volume phase diffraction grating provides high dispersion, uniformly high diffraction efficiency and equal diffraction efficiencies for all polarizations across a wide range of wavelengths. The thickness of the volume phase material and the modulation of its refractive index are jointly established to provide equalization of diffraction efficiencies for all polarizations over a wide range of wavelengths. The equalization occurs where the S and P diffraction efficiencies are both at a maximum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.