Circuit for monitoring the receiver of an optical transceiver and the method for monitoring burst mode optical power thereof
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United States of America Patent
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Jul 29, 2014
Grant Date -
May 2, 2013
app pub date -
May 23, 2012
filing date -
Oct 26, 2011
priority date (Note) -
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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.
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