Patent ID: 8240207

Claim:
A sensor comprising: a housing; a mass moveably disposed within the housing; a first anchor attached to the housing; a second anchor attached to the mass; at least one suspension member interposed between the mass and the housing that allows the mass to move freely along one axis while restricting motions of the mass along all other axes, wherein the at least one suspension member includes at least one circular diaphragm and the at least one circular diaphragm contains at least one concentric ridge; a section of an optical fiber attached at one end thereof to the first anchor and attached at the other end thereof to the second anchor, the section of optical fiber having a grating inscribed therein, the section of optical fiber serving both as a restoring spring and to sense relative motion between the mass and the housing; an additional spring between the mass and the housing for imposing a fixed tension upon the fiber to enable measurements of motion of the sensor in any orientation; and means for adjusting the spring to control the fixed tension imposed upon the fiber.