Abstract: A method to identify the wavelength of incoming light is disclosed. The method includes steps to measure a first photocurrent by setting the avalanche photodiode (APD) in a photodiode (PD) mode and a second photocurrent by setting the APD in the APD mode, and to compare a ratio of the two photocurrents with prepared references.
Type:
Grant
Filed:
May 13, 2014
Date of Patent:
November 3, 2015
Assignee:
Sumitomo Electric Device Innovations, Inc.
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