Optical fiber Mach-Zehnder interferometer fabricated with asymmetric couplers
US6226091A · kind A · utility
3Cited by
2References
20Claims
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Key dates
| Filing date | Sep 23, 1999 |
| Grant date | May 1, 2001 |
| Priority date | — |
| Expiry date | Sep 23, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/29355
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An asymmetric optical fiber Mach-Zehnder interferometer has first and second optical fibers connected at a first coupling region and a second coupling region. The first and second optical fibers form two interfering arms between the first and second coupling regions. To form the asymmetry, the propagation constant in a portion of the first optical fiber in one of the coupling regions differs from the propagation constant in a portion of the second optical fiber in that coupling region. The asymmetric structure provides 30 dB isolation over a greater wavelength span.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.