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:
Jan. 09, 2007
Filed:
Apr. 25, 2003
James Fraser, Torquay, GB;
Stephen Pope, Towcester, GB;
Colin Edge, Northampton, GB;
Steven Borley, Towcester, GB;
Lisa Daykin, East Hunsbury, GB;
Kevin Mullaney, Cogenhoe, GB;
James Fraser, Torquay, GB;
Stephen Pope, Towcester, GB;
Colin Edge, Northampton, GB;
Steven Borley, Towcester, GB;
Lisa Daykin, East Hunsbury, GB;
Kevin Mullaney, Cogenhoe, GB;
Bookham Technology PLC, Towcester, GB;
Abstract
A method and assembly for frequency stabilization of an optical signal especially from a laser, the assembly () comprising beam splitter (), a passive frequency discriminator (), and a pair of photodiodes (&). The beam splitter () in use receives a collimated optical beam (B) and diverts a sample beam (B) which is directed towards the discriminator () which transmits a portion (B) of said sample beam to one of the photodiodes () and reflects a second portion (B) of said sample beam to the other photodiode (). A control signal (S) is derived from the respective intensities of the transmitted and reflected portions of the sample beam, and utilized to operate the electronic control to adjust the frequency of the laser output signal, if required, to maintain a specified frequency.