The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 08, 2014
Filed:
Apr. 01, 2011
Ronald T. Logan, Jr., Pasadena, CA (US);
Ka Kha Wong, Alhambra, CA (US);
Ronald T. Logan, Jr., Pasadena, CA (US);
Ka Kha Wong, Alhambra, CA (US);
Emcore Corporation, Albuquerque, NM (US);
Abstract
A compact fiber optic gyroscope including a first housing; a transceiver module disposed in the first housing, the transceiver module including a second housing; a non-coherent light source disposed in the second housing for producing a first beam of light; a single lens for focusing the first beam of light; an optical circulator disposed in the second housing and in the path of the first beam of light to produce polarized second and third beams respectively, with polarization orthogonal to each other; and first and second photodiodes disposed in the second housing and coupled to the optical circulator, wherein the first photodiode is a transmit monitor photodiode coupled to the second beam, and the second photodiode is a receiver photodiode. The first housing further includes a planar optical fiber loop having a first end and a second end; a phase modulator coupled to the third beam emitted from the transceiver module to produce fourth and fifth beams coupled to the first and the second end respectively of the optical fiber loop respectively, and for receiving the return sixth and seventh beams from the second and the first ends respectively of the optical fiber loop.