Accession Number:

ADA151704

Title:

Wideband Fiber Optic Communications Link.

Descriptive Note:

Master's thesis,

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s):

• Bray,J. R.

Report Date:

1984-12-01

Pagination or Media Count:

107.0

Abstract:

This thesis examined the feasibility of upgrading a nine port fiber optic bundle telecommunications system to a single strand fiber optic system. Usable pieces of equipment were identified and new Light Emitting Diodes LED, Photodetectors and single strand SMA styled fiber optic connectors were ordered. Background research was conducted in the area of fiber optic power launching, fiber losses, connector losses and efficiencies. A new modulationdemodulation circuit was designed and constructed using parts from unused equipment. A new front panel was constructed to house the components, switches and connectors. A 2-m piece of optical fiber was terminated with the new connectors and tested for connector loss, numeric aperture and attenuation. The new LED was characterized by its emission radiation pattern and the entire system was tested for functional operation, frequency response and bandwidth of operation. An operations manual was prepared to ensure proper use in the future. The result was a two piece, single strand, fiber optic communications systems fully TTL compatible, capable of transmitting digital signals from 80 Kbitsec to 20 Mbitsec. The system was tested in a half duplex mode using both baseband and carrier modulated signals.

Descriptors:

• *FIBER OPTICS
• *COMMUNICATION AND RADIO SYSTEMS
• DIGITAL SYSTEMS
• EMISSION
• THESES
• SIGNALS
• OPERATION
• LAUNCHING
• FUNCTIONAL ANALYSIS
• BACKGROUND
• ATTENUATION
• POWER
• LOSSES
• CONNECTORS
• BANDWIDTH
• PHOTODETECTORS
• MODULATION
• DEMODULATION
• TRANSMITTING
• FREQUENCY RESPONSE
• STRANDS
• RADIATION PATTERNS
• LIGHT EMITTING DIODES

Subject Categories:

• Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE