Fiber optic wavelength division multiplexing module
US4932742A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 27, 1989 |
| Grant date | Jun 12, 1990 |
| Priority date | — |
| Expiry date | Jan 27, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/4246
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light source or detector equipped with an optically transmissive window is coupled to a juxtaposed collimating lens for directing light onto a first side of a dichroic filter which passes or blocks a selected wavelength of light. A second lens in juxtaposition with a second side of the dichroic filter focuses light either passed or reflected by the filter onto an optical fiber for transmission or reception of optical signals. A second optical fiber is connected to the second lens and to a third lens for which conveys light between the second optical fiber and a dichroic filter for passing a different wavelength of light and reflecting the selected wavelength, the filter being in juxtaposition with a window of an optical detector. All components are embedded in a molded enclosure for protecting the optical elements and optical fibers from environmental conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.