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:
Sep. 23, 2008
Filed:
Apr. 13, 2004
Applicants:
Alwyn Seeds, London, GB;
Cyril Renaud, London, GB;
Inventors:
Alwyn Seeds, London, GB;
Cyril Renaud, London, GB;
Assignee:
University College London, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 3/13 (2006.01); H01S 3/04 (2006.01); H01S 3/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
This invention describes a technique and apparatus to use any tuneable laser to generate a specified output frequency without controlling its temperature. This technique only involves a thermal sensor and a controller a determine the current(s) of voltage(s) applied to the grating or tuning section(s) to obtain the required wavelength. The control loop can be implemented using a programmed microprocessor, an amplifier and a low pass filter.