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. 20, 2004
Filed:
Jul. 18, 2002
James N. Baillargeon, Springfield, NJ (US);
Wen-Yen Hwang, Sugar Land, TX (US);
Klaus Alexander Anselm, Sugar Land, TX (US);
Chih-Hsiang Lin, Sugar Land, TX (US);
Applied Optoelectronics, Inc., Sugar Land, TX (US);
Abstract
A monitored laser system has a laser having a first mirror; an exit mirror, at least a portion of a laser cavity defined by the first mirror and the exit mirror; and an active region located in the laser cavity, the active region containing a material that is capable of stimulated emission at one or more wavelengths of laser light within a tuning range of the laser. A multiple reflectivity band reflector (MRBR) is coupled to at least a portion of laser light emitted from the laser and transmits filtered laser light. The MRBR has a plurality of layers of material arranged in parallel such that the reflector has a plurality of reflectivity peaks within the tuning range, each reflectivity peak separated from neighboring reflectivity peak by a reflectivity trough having a trough minimum, said reflectivity peaks characterized by a peak profile and said trough minima between said reflectivity peaks characterized by a trough profile. At least one of the peak and trough profiles has a substantially non-constant relationship of wavelength to reflectivity. A first photodiode coupled to at least a portion of the filtered laser light produces an output based on the amount of light received. The emitted wavelength of the laser is adjusted toward a desired wavelength within the tuning range based at least in part on the output of the first photodiode.