Fiber Optic Bragg Grating Model.
Abstract
Photoinduced Bragg Grating in optical fibers were first demonstrated by Hill et al. in 1978. In 1988 Meltz, et al. developed an external Bragg grating writing technique which had more flexibility in the choice of the Bragg period. Since then and due to their unique properties a number of sensing concepts have been proposed and demonstrated. Most of these sensors are configured as back reflectors. A more general configuration, a Tapped Bragg Grating (TBG), was first demonstrated by Meltz et al. in 1991. A complete theory for the fabrication and operation of TBG's is still incomplete. In this report a simple model of Tapped Bragg Gratings is developed. This model will allow the understanding of the basic parameters necessary to fabricate TBG's. Several questions have to be answered to effectively fabricate a TBG sensor. Some of these questions are: What must the Bragg angle and period (Theta sub B and Delta sub B) be in order to effectively scatter radiation out of the fiber at a desired scattering angle Theta?
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1995
- Accession Number
- ADA297671
Entities
People
- Ignacio Perez
- Marty Ryan
- Thomas Bibby
Organizations
- Naval Air Warfare Center Aircraft Divison