Patent ID: 7689071

Claim:
A Fabry-Perot pressure chip for use as a pressure sensor when interfaced to an optical fiber, the chip comprising: an integral body comprising a recessed cavity defining a first surface; and a diaphragm, separate and distinct from the integral body, covering the recessed cavity defining a first surface, and affixed to the body, the diaphragm defining a second surface; the first and second surfaces being separated by a distance and forming a Fabry-Perot cavity; the integral body further comprising a fiber receiving cavity opposed to and spaced from said recessed cavity and said first surface and defined by a fiber tip receiving surface and a side wall, the fiber receiving cavity for receiving an extremity of said optical fiber such that an adhesive receiving space is defined between an external side surface of the optical fiber and the side wall for receiving a small quantity of adhesive to secure the received extremity within said fiber receiving cavity, the side wall and the external side surface of the optical fiber defining an angle that is smaller than about fifteen degrees.