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:
Aug. 30, 2005
Filed:
Jul. 11, 2002
Marek A. Osinski, Albuquerque, NM (US);
Edward W. Taylor, Albuquerque, NM (US);
Petr G. Eliseev, Albuquerque, NM (US);
Marek A. Osinski, Albuquerque, NM (US);
Edward W. Taylor, Albuquerque, NM (US);
Petr G. Eliseev, Albuquerque, NM (US);
Science & Technology Corporation @ University of New Mexico, Albuquerque, NM (US);
Abstract
A monolithically integrated semiconductor laser rotation sensor/gyroscope that includes at least two isolated, nonsynchronized semiconductor lasers; at least one being unidirectional and at least a further one being either a straight-line laser or a second unidirectional ring laser configured to propagate lasing light waves in the direction opposite to the first unidirectional ring laser; semiconductor directional waveguide couplers; a semiconductor Y-junction mixing region; and a semiconductor photodetector. Evanescently outcoupled signals are routed to a photodetector for detection of the Sagnac shifted frequencies to discern a beat frequency resulting from rotation of the chip structure. The straight-line semiconductor laser serves as frequency reference insensitive to rotation. Directing, filtering, and radiating unwanted reflections or backscattered light to highly absorbing regions is carried out with waveguide coupler designs and nonreciprocal couplers and filters.