Frederick J. Gillham

Fiber Optic Pressure Sensors Employing Reflective Diaphragm Techniques

In this paper details will be presented of fiber optic pressure sensors that utilize the deflection of a thin diaphragm as the sensing mechanism. The magnitude of the deflection is monitored optically by either: (a) Measurement of the change in intensity distribution of light reflected from the diaphragm due to the changing shape of the reflecting surface, or (b) Interferometric measurement of the optical cavity thickness formed by the fiber end and the reflecting diaphragm surface.

Bandwidth Limiters For Single Mode Fiber Communication Systems

Various techniques for restricting the bandwidth of a single mode fiber are discussed. The limitations of a fiber optic delay line bandwidth limiter are addressed and several alternatives proposed.

Right-angle connectors for high-density patch panels and interconnects

A technology is described which allows singlemode and multimode optical fibers to be bent in radii less than 1mm without significant increase in loss or long term reliability. This technology is particularly suitable for the development of high-performance low-cost right- angle connectors for high-density patch panels and interconnects.

Optical Fiber Temperature Sensor Employing Absorptive Cladding Techniques

Linearization of the temperature response for temperature sensors based on absorptive cladding techniques has been achieved. Results using both multimode glass and plastic fiber are presented in the range 0 - 150 and 0 -70 degrees Centigrade respectively.