Apparatus and methods for reconfigurable optical receivers
US10075245B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 2016 |
| Grant date | Sep 11, 2018 |
| Priority date | — |
| Expiry date | May 22, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/2575
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical receiver includes a cascade of optical filtering elements, each of which selects spectral components from incoming optical signals at a wavelengths aligned to filter passbands. The selected spectral components may be optically combined to form k pairs of intermediary signals, where k=log2(M). By comparing the k pairs of intermediary signals, k bits of a digital signal representing the incident signal may be generated. The filtering elements may be configured to perform demultiplexing and demodulation simultaneously, increasing functionality and reducing excess losses. The filtering elements may also be tuned so that the optical receiver may be reconfigured to accommodate different combinations of wavelengths and modulation formats, such as wavelength division multiplexed (WDM) on off keying (OOK), M-ary orthogonal formats including frequency shift keying (FSK) and pulse position modulation (PPM), differential phase shift keying, and hybrid combinations—providing rate and format flexibility and WDM scalability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.