Wavelength Division Multiplexing in Light Interface Technology.
Abstract
The report describes the investigation and fabrication of a five channel wavelength division multiplex (WDM) optical communication link. The transmitter consists of five different wavelength Ga(1-x)Al(x)As light emitting diodes (LEDs) and the receiver consists of five narrowband photodiodes (PDs). The light is conducted from the transmitter to the receiver by a fiber optic bundle. Various techniques (dichroic filters, furcated fiber bundle, and LED and PD plane arrays) of coupling the light into and out of the fiber bundle are investigated. Measurements of receiver sensitivity, optical efficiency, and optical cross-coupling between channels were made. A theoretical analysis of the link optical efficiency and expected cross-coupling is performed and design information for future WDM optical links is established. It is also determined that fiber bundles which are classified as incoherent are, in general, quasi-coherent. It was necessary to incorporate optical mixing cylinders at the entrance and exit of the bundle to uniformly distribute the light throughout the cross-section. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 18, 1971
- Accession Number
- AD0721085
Entities
People
- Daniel J. Stigliani Jr.
- David W. Hanna
- Robert J. Lynch
Organizations
- International Business Machines Corporation (Armonk, NY)