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:
May. 14, 2002
Filed:
Nov. 03, 1999
Donald Dominic Arnone, Cambridge, GB;
Andrew James Shields, Cambridge, GB;
Richard Andrew Hogg, Cambridge, GB;
Craig Michael Ciesla, Cambridge, GB;
David Mark Whittaker, Cambridge, GB;
Edmund Harold Linfield, Cambridge, GB;
Alexander Giles Davies, Cambridge, GB;
Toshiba Research Europe Limited, Cambridge, GB;
Abstract
An optical device for efficient radiation emission having a modulation region with phase matching means ( ) for enhancing the phase matching between two different frequency signals propagating in the optical modulation region ( ) in response to illumination by at least one incident beam ( ), the phase matching means ( ), having a spatial variation in its refractive index ( ) along the path of the incident radiation beam ( ). The device may be configured as a radiation source comprising a frequency conversion member (C ) for emitting a beam of radiation ( ) in response to irradiation by one or more input beams ( ), the emitted beam ( ) having a frequency different to that of the one or more input beams ( ), the one or more input beams ( ) all being produced within a lasing cavity (defined by M M M M and output coupler ( )) and said frequency conversion member (C ) being located within said lasing cavity. The invention also extends to an imaging system using the radiation source.