Digital wavelength division multiplex optical transducer having an improved decoder
US5281811A · kind A · utility
106Cited by
6References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 17, 1991 |
| Grant date | Jan 25, 1994 |
| Priority date | — |
| Expiry date | Jun 17, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/38
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fiber optic optical transducer or encoder is described. The outputs of two detectors receiving signals from an optical multiplexer/demultiplexer arrangement are compared to determine whether a given code bit is "on" or "off". When the bit is "on" the power received by the second detector will, for example, be greater than the power received by a first detector. When the bit is "off" the reverse is true. A simple power level comparison thus determines the logic state of each given code bit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.