Optical fiber multiport apparatus for detecting phase shifts
US5581641A · kind A · utility
4Cited by
10References
11Claims
0Family size
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Key dates
| Filing date | May 2, 1995 |
| Grant date | Dec 3, 1996 |
| Priority date | — |
| Expiry date | May 2, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/2793
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A coherent detector which is insensitive to signal or polarization state may be assembled using a fused optical fibre multiport constructed from five optical fibres. The fibres are fused in a circularly symmetric arrangement, then tapered until power injected into any input is equally distributed to all outputs. Reference signals are injected into adjacent inputs and the signal to be detected into a signal adjacent one of the reference inputs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.