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:
Aug. 11, 2020
Filed:
Mar. 15, 2018
Lumentum Operations Llc, Milpitas, CA (US);
Shumin Wang, Shenzhen, CN;
Lumentum Operations LLC, Milpitas, CA (US);
Abstract
A measurement device may include a bias source to provide a bias, a photodiode to provide a linear current based on an input optical power and the bias, a log amplifier to receive the linear current and to provide a voltage, and one or more processors to receive the voltage and to determine a measurement of the input optical power at an observed temperature. The measurement may be determined based on a photodiode current corresponding to the voltage, a dark current, and a calibration current. The calibration current may be determined, for a threshold power range, based on a first plurality of current measurements at a first temperature and at a plurality of optical powers, a second current measurement at a second temperature and at a first optical power, and a third current measurement at the second temperature and at a second optical power.