Apparatus and method for receiving optical telecommunication transmissions by using a holographic optical element
US6498662B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 28, 2000 |
| Grant date | Dec 24, 2002 |
| Priority date | — |
| Expiry date | Jan 11, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/32
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A holographic optical element (HOE) device useable for an optical receiver system has a first element having first and second surfaces, with the first surface being positionable to face incident light rays. The incident light rays can comprise laser light having data modulated thereon. An emulsion material is disposed over the second surface of the first element and has a recorded interference pattern that diffracts the incident light rays that pass through the first element. A second element overlies the emulsion material and is structured to pass resulting light rays derived from the incident light rays and diffracted from the recorded interference pattern. A plurality of reflective elements are positioned adjacent to the first and second elements. The reflective elements fold the resulting light rays within the second element, thereby allowing a reduction in separation length between the emulsion material and receiver electronics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.