Ciena Corporation

Altera Corporation

Pts Corporation

David Atkinson

Choudhury A Al Sayeed

David W Boertjes

David Casson Bownass

Scott Kohlert

Rajkumar Nagarajan

Marc De La Durantaye

David Miedema

Andrew Robinson

Jean Guy Chauvin

Sacha Corbeil

Chris Passier

Madhu Krishnaswamy

Paul Fecteau

Carl Krentz

Choudhuty A Al Sayeed

Systems and methods for automatic link calibration include subsequent to installation of equipment for the amplified optical section, obtaining power measurements of optical spectrum in the optical section; obtaining properties of fiber in the amplified optical link; analyzing the power measurements and the properties of the fiber to determine settings for the equipment for calibration thereof; and automatically configuring the settings for the equipment. The settings are based on the power measurements and the properties of the fiber to achieve a target launch power per span in the amplified optical section, and wherein the target launch power is based on Optical Signal-to-Noise Ratio (OSNR) and non-linearity in the amplified optical section.

Automatic optical link calibration of amplified optical links

Systems and methods of optical restoration include, with a photonic service (), in an optical network (), operating between two nodes (A, Z) via an associated optical modem () at each node, wherein each modem () is capable of supporting variable capacity, C, C, . . . , Cwhere C&#x3e;C&#x3e; . . . &#x3e;C, detecting a fault () on a home route of the photonic service () while the photonic service () operates at a home route capacity C, Cis one of C, C, . . . , C; downshifting the photonic service () to a restoration route capacity C, Cis one of C, C. . . , Cand C&#x3c;C; switching the photonic service () from the home route to a restoration route () while the photonic service () operates at a restoration route capacity C; and monitoring the photonic service () and copropagating photonic services during operation on the restoration route () at the restoration route capacity Cfor an upshift of the photonic service ().

Systems and methods for achieving best effort home route capacity on protection paths during optical restoration

Automatic optical link calibration systems and methods include an optical node with an Optical Add-Drop Multiplexer (OADM) multiplexer including a channel holder source; an optical amplifier connected to the OADM multiplexer and to a fiber span; an Optical Channel Monitor (OCM) configured to monitor optical spectrum before and after the optical amplifier; and a controller configured to obtain data associated with the fiber span including measurements from the OCM, determine settings of the channel holder source needed to meet a target launch power profile for the fiber span, and configure the channel holder source based on the determined settings.

Automatic optical link calibration with channel holders

Systems and methods for measuring accumulated power losses over a fiber link are described in the present disclosure. According to one embodiment, a method includes the step of measuring accumulated losses over a fiber link. The method also includes the step of at least partially compensating for the measured accumulated losses. In response to determining that there is a compensation shortfall with respect to the accumulated losses, the method includes the step of transmitting the compensation shortfall to one or more downstream controllers.

Handling compensation for losses in optical fiber links

Systems and methods of optical restoration include, in an optical network with a photonic service operating between two nodes via an associated optical modem at each node, wherein each modem is capable of supporting variable capacity, C, C, . . . , Cwhere C&#x3e;C&#x3e; . . . &#x3e;C, detecting a fault on a home route of the photonic service while the photonic service operates at a home route capacity C, Cis one of C, C, . . . , C; downshifting the photonic service to a restoration route capacity C, Cis one of C, C. . . , Cand C&#x3c;C; switching the photonic service from the home route to a restoration route while the photonic service operates at a restoration route capacity C; and monitoring the photonic service during operation on the restoration route at the restoration route capacity Cfor an upshift.

An automatic optical power management system for use with an optical communications system includes a light source residing in a first circuit pack and adapted to emit light at a nominal power level only absent receipt of an indicator signifying a loss of signal resulting from a fiber discontinuity relating to the first optical fiber, wherein the nominal power level is of sufficient magnitude to violate laser safety guidelines in the event of the fiber discontinuity. A redundant detection system includes a first optical detector residing in the first circuit pack, and a second optical detector residing in a second circuit pack that is optically adjacent to the first circuit. A redundant response system communicates an indicator signifying loss of signal from the first and second optical detectors to the light source upon detection of loss of signal by either detector.

Automatic optical power management in optical communications system

In accordance with the present invention, an improved method is provided for synchronizing a pulse stream with a data stream in an optical communications system. The improved method includes: generating an optical data signal for transmission through the optical communication system, where the data stream exhibits a duty cycle less than fifty percent and the optical data signal is formed from the pulse stream and the data stream; detecting an optical power level associated with the optical data signal; and synchronizing the pulse stream with the data stream based on the optical power level associated with the optical data signal. Specifically, the pulse stream is temporally aligned with the data stream when the average power of the optical data signal is maximized.

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Ottawa, Canada

David Atkinson