US 7,072,582 B2 · Optical transmitter power setting using feedback

Abstract

A method and system for automatically setting output power levels of optical transmitters in an optical communications arrangement. The optical communications arrangement includes at least a first and a second node, wherein the transmitter of the first node is optically coupled to a receiver in the second node, and the transmitter in the second node is optically coupled to a receiver in the first node. Respective sequences of power-level messages are transmitted from the transmitters to the receivers. Each power-level message indicates an output power level used by the transmitter to transmit the message, and each power-level message in a sequence is transmitted at an increasing power level. The power levels at which the power-level messages are received by the receivers are detected, and when a receiver receives a power-level message at a power level that satisfies a selected power level, the output power level of the coupled transmitter is automatically set to the output power level indicated in the power-level message.

Claims11

Dependent claims

A method for automatically setting output power levels of optical transmitters in an optical communications arrangement having at least a first and a second node, wherein the transmitter of the first node is optically coupled to a receiver in the second node, and the transmitter in the second node is optically coupled to a receiver in the first node, comprising:

transmitting respective sequences of power-level messages from the transmitters to the receivers, wherein each message in a sequence includes output-power code that indicates an output power level used by the transmitter to transmit the message, and each transmitter uses increasing power levels to transmit each power-level message in the sequence;
detecting power levels at which the power-level messages are received by the receivers;
and
when a receiver receives a power-level message at a power level that satisfies a selected power level, automatically setting an output power level of the coupled transmitter to the output power level indicated in the power-level message.

1 more element

A circuit arrangement for automatically setting output power levels of optical transmitters in an optical communications arrangement, comprising:

a first node having a first transmitter, a first receiver, and a first control circuit coupled to the first transmitter and to the first receiver;
a second node having a second transmitter, a second receiver, and a second controller coupled to the second transmitter and to the second receiver, wherein the second transmitter is optically coupled to the first receiver of the first node, and the second receiver is optically coupled to the first transmitter of the first node;
wherein the first and second transmitters are configured to transmit respective sequences of power-level messages to the second and first receivers responsive to the first and second control circuits, each power-level message in a sequence transmitted at an increasing power level and including an output-power code that indicates an output power level used to transmit the message;
wherein the first and second receivers are configured to detect power levels at which the power-level messages are received;
and
wherein the first and second control circuits are configured to determine when power levels at which power-level messages are received satisfy respective, selected power levels and automatically set output power levels of the first and second transmitters to power levels indicated in the power-level messages.

3 more elements

Dependencies are inferred from the claim text.

Optical transmitter power setting using feedback

Life of this patent

Optical transmitter power setting using feedback

Life of this patent

Abstract

Claims11