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:
Jun. 17, 2003
Filed:
Mar. 27, 2002
New Elite Technologies, Inc., Hsinchu, TW;
Abstract
A control method and apparatus used for a bias controller of automatic bias correction on an optical modulator of optical emitter of external modulation type is a close-loop control system, composed of a base signal generator, an optical receiver, a second-order harmonic signal generator, a second-order harmonic signal detector, a DC amplifier, and a temperature automatic correction device. The bias voltage point of the optical modulator can remain a constant, whereby the optical power can be exported in stable level and distortion of transmission is reduced. It can be avoided about the effect of the environmental temperature, resulting in the change of optical output and the additional signal distortion of the transmission signal.