Time sampled photodetector devices and methods
US9917650B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 26, 2016 |
| Grant date | Mar 13, 2018 |
| Priority date | — |
| Expiry date | Oct 4, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/66
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Photonic integration has primarily sought to exploit optical parallelism through wavelength division multiplexing whilst in many instances “brute-force” time division multiplexing offers benefits through reduced complexity and cost. However, photoreceivers are primarily the same now for operation at 10 Gb/s, 20 Gb/s, 40 Gb/s and above as 20 or 25 years ago and exploit the same optical detection—amplification—logic processing design. However, high speed low cost electronics ca be leveraged in conjunction with optical time sampling and logic to provide a new design paradigm. An incoming XGbs−1 optical data stream is sampled and processed by N photodetectors each operating at (X/N)Gbs−1 rather than the current direct XGbs−1 front-end of the prior art. Flexibility for the designer in establishing N within optical layer constraints, electronics capabilities etc. allows for further cost—power—complexity—performance tradeoffs to be established in different systems such that high capacity TDM links can exploit direct CMOS integrated optoelectronic front-ends.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.