Acousto-optic frequency shifter using optical fiber and method of manufacturing same
US4735485A · kind A · utility
16Cited by
10References
24Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 17, 1984 |
| Grant date | Apr 5, 1988 |
| Priority date | — |
| Expiry date | Feb 17, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/2821
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A fiber optic frequency shifter comprises an optical fiber having two propagation modes and an acoustic transducer for generating an acoustic wave. The transducer is positioned relative to the fiber to cause the wave fronts of the acoustic wave to acoustically contact the fiber at an angle of incidence which is less than 90.degree. greater than 0.degree.. Preferably, the wavelength of the acoustic wave is substantially equal to the beat length of the fiber times the sine of the angle of incidence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.