Fiber-optic equalizer
US5054875A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 1, 1990 |
| Grant date | Oct 8, 1991 |
| Priority date | — |
| Expiry date | Aug 1, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/2581
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A multi-mode optical fiber segment having partially reflecting mirrors on each end functions as a resonant cavity with respect to the modulation frequency when the length of the fiber is equal to one-half the modulation wavelength of the light injected into the fiber. Modulated light is injected through a hole in the mirror at one end, either from a fiber, a waveguide, or directly from a laser diode. The core diameter of the cavity fiber is limited only by the requirement that it must be much larger than the input hole. Light exits though a hole in the mirror opposite the input hole. Upon entry into the resonant cavity, light is subject to multi-modal propagation resulting in dispersion. The resultant output light of the fiber is lower overall in intensity, but its useful frequency response is expanded by the bandpass half-skirt of the fiber-optic filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.