Wavelength dispersing device
US9354365B2 · kind B2 · utility
4Cited by
26References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 28, 2014 |
| Grant date | May 31, 2016 |
| Priority date | — |
| Expiry date | Jun 5, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2005/1804
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A compact wavelength dispersing device and a wavelength selective optical switch based on the wavelength dispersing device is described. The wavelength dispersing device has a folding mirror that folds the optical path at least three times. A focal length of a focusing coupler of the device is reduced and the NA is increased, while the increased optical aberrations are mitigated by using an optional coma-compensating wedge. A double-pass arrangement for a transmission diffraction grating allows further focal length and overall size reduction due to increased angular dispersion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.