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:
Nov. 25, 1986
Filed:
Aug. 27, 1984
Richard R Lemberger, St. Paul, MN (US);
Paul C Schubert, St. Paul, MN (US);
Steven R Tobin, St. Paul, MN (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
Circuitry and apparatus for stabilizing the output of a laser diode when modulated with a wideband analog signal. The circuitry provides for continuous operation of the laser diode with a pin diode positioned for receiving a portion of the output from the laser diode via optics positioned between the laser diode and the pin diode. The optics includes a collimator, a linear polarizer and a polarization beam splitter. The circuitry includes a high gain amplifier which receives the analog signal with a compensating network connected between the amplifier output and the laser diode. The circuitry also has a feedback circuit portion including the pin diode connected to one input of the amplifier.