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. 12, 2018
Filed:
Mar. 25, 2016
Dynamic Photonics, Inc., Albuquerque, NM (US);
Payman Zarkesh-Ha, Albuquerque, NM (US);
Majeed M. Hayat, Albuquerque, NM (US);
Robert Efroymson, Santa Fe, NM (US);
DYNAMIC PHOTONICS, INC., Albuquerque, NM (US);
Abstract
Method and apparatus for maximizing the output of a dynamically biased avalanche photodiode (APD). The output of the APD is amplified. A feedback loop comprising a phase shifter measures the RF power of the amplified output and adjusts the phase of the AC signal which is used to dynamically bias the APD until the output power is maximized. The AC signal is also split into out of phase signals, thereby substantially canceling out the bias current injected into the APD output, leaving only the desired amplified optical output signal. The monitoring and tuning of the AC dynamic bias can eliminate phase drift over time, as well as other non-ideal effects that can occur, such as those due to temperature changes or device aging effects.