OPTICAL SENSING SYSTEM USE

Brand	Owner	Address	Description
MARBLE SOLID STATE SENSING	Logitech, Inc.	6505 Kaiser Drive Fremont CA 94555	optical sensing system for use with hand-operated computer input devices and manuals for use therewith, sold as a unit;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

A method and apparatus sense attributes of reflected signals in an optical sensing system. In one embodiment, a method for sensing in an optical sensing system comprising an interrogator coupled to a Bragg grating sensor by an optical cable includes the steps of producing a first optical signal, coupling the first optical signal to an optical cable, receiving a first reflected signal from a Bragg grating sensor within the optical cable, resolving a wavelength of first reflected signal, producing a second optical signal, coupling the second optical signal to the optical cable, receiving a second reflected signal caused by Brillouin backscattering within the optical cable, and resolving a difference in frequencies between the second optical signal and second reflected signal. Embodiments of the method and apparatus are particularly useful for sensing temperature and strain in hazardous locations such as down hole gas and oil field applications and the like.