Optical modulation device and fiber optic communication system
US5724459A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 1996 |
| Grant date | Mar 3, 1998 |
| Priority date | — |
| Expiry date | Jul 3, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/0327
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A optical divider equally divides a optical carrier into first and second optical carriers. A 180.degree. divider divides an RF sub-carrier signal into first and second RF sub-carrier signals whose phases are 180.degree. inverted from each other. An electro-optic modulator modulates the first optical carrier with the first RF sub-carrier signal and outputs a first optical signal. An electro-optic modulator modulates the second optical signal with the second RF sub-carrier signal and outputs a second optical signal. Photodiodes convert the first and second optical signals transmitted by the optical fibers into first and second electric signals, respectively. A 180.degree. combiner inverts by 180.degree. the phase of the first electric signal and combines it with the second electric signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.