Coupling of strongly and weakly guiding waveguides for compact integrated mach zehnder modulators
US5799119A · kind A · utility
45Cited by
5References
7Claims
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Key dates
| Filing date | Jul 3, 1996 |
| Grant date | Aug 25, 1998 |
| Priority date | — |
| Expiry date | Jul 3, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/125
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A Mach Zehnder (MZ) modulator with improved coupling of input and output fibers is provided. The MZ modulator combines the advantages of weakly guided input sections with strongly guided sections to optimize the coupling efficiency and selectivity of the device. Improved coupling between weakly and strongly guided sections of waveguide is provided by an intermediate tapered waveguide section which provides gradually changing mode confinement, which reduces the mode mismatch loss and therefore suppresses the reflection at the junction between the weakly and strongly guided sections of the waveguide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.