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. 29, 2014
Filed:
May. 23, 2012
Xu Jiang, Sichuan Province, CN;
Xin Shuai, Sichuan Province, CN;
Bing Ju, Sichuan Province, CN;
Yi Yang, Sichuan Province, CN;
Source Photonics, Inc., Chatsworth, CA (US);
Abstract
A circuit for monitoring an optical receiver or transceiver, architectures, circuits, and systems including the same, and a method for monitoring received optical power are disclosed. The receiver monitoring circuit comprises an avalanche photodiode (APD), a microprocessor, and first and second transresistance amplifiers. The microprocessor is configured to supply bias voltage to the APD. Photocurrent produced by the APD is supplied to the first and second transresistance amplifiers, and then the microprocessor captures optical power from the voltage signal of the first and second transresistance amplifiers. By algorithms and microprogramming systems, the circuit for monitoring the optical receiver and method of monitoring optical power enables precision compensation for monitoring burst mode optical power in commercial temperature ranges and powers, and also can be applied to high precision digital monitoring of optical transceivers in a PON system in the commercial temperature range with error values within ±1 dB.