Multiwavelength data communication fiber link
US5278687A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1991 |
| Grant date | Jan 11, 1994 |
| Priority date | — |
| Expiry date | Apr 5, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/0307
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical multi-channel data communication link transmits data from a transmitter to a remote receiver. The link includes a multimode laser diode source connected to the transmitter, a device for modulating the source with each channel of data to generate a modulated light wave, and a wavelength division multiplexing device at the transmitter. The wavelength division multiplexing device has paraxial optics for multiplexing the light waves to produce a multiplexed signal. Multimode fiber optic means are connected to the multiplexer and pass the multiplexed signal to the remote receiver. A wavelength division multiplexer has paraxial optics for demultiplexing the multiplexed signals at the receiver to produce demultiplexed light waves. Each of the demultiplexed light waves are converted for use by the receiver. Preferably, each of the wavelength division multiplexer and demultiplexer has a littrow reflecting grating and a lens which are paraxially aligned with the multimode fiber optic means to provide channel separation of less than 50 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.