Low loss high speed optical switch
US10425708B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 16, 2018 |
| Grant date | Sep 24, 2019 |
| Priority date | — |
| Expiry date | Apr 17, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2011/0083
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method for controlling the splitting ratio of an input optical signal to one or more output ports is described. The splitting ratio of a fiber-coupled signal in the communications band is controlled using cross phase modulation from a pump signal in the 980-1090 nm band. This design allows the nonlinear fiber in which the cross phase modulation occurs to be standard single mode fiber having a zero dispersion wavelength between 1250 and 1350 nm, such as SMF-28e fiber, which helps to maintain the lowest possible loss and a low cost while still allowing for power efficient interactions with signal wavelengths in the technologically important 1520-1610 nm band. The design is compatible with low insertion loss, narrow switching windows, and low added noise. The location of the pump pulse can be controlled allowing for the location of an input pulse to be determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.