Lucent Technologies Inc.

Alcatel-Lucent USA Inc.

Siegfried Karl Gronbach

Andreas Benz

Stefan Weisser

Konrad Czotscher

Roland Seitz

The invention includes a method for processing messages at a component. One method includes receiving a message formed according to an embedded protocol or an external protocol, processing a portion of the received message for identifying the protocol used to form the message, and processing the received message using the identified protocol. The portion of the received message is formed using a comparison between at least one characteristic associated with the embedded protocol and at least one characteristic associated with the external protocol. Another method includes receiving, at a first type-one component, a message from one of a second type-one component or a type-two component, processing a portion of the message for identifying a protocol adapted for processing the received message, and processing the received message using the identified protocol.

Method for switching between embedded communications and external communications

A method and apparatus for dynamically compensating for phase deviations using two synchronous rectifiers in a quadrature constellation and a delay line.

Pilot tone bias control

Techniques to control an optical receiver having a control loop using Bit Error Rate (BER). In one implementation, a bit error rate (BER) associated with a received optical signal is determined. Indication of the BER to a control loop adapted is provided to adjust the optical signal in a manner tending to reduce the BER. The received optical signal is adapted in a manner tending to increase the BER such that the control loop operates within an active control region.

Deliberate signal degradation for optimizing receiver control loops

An optical RZ transmitter comprises an optical signal source and a pair of electro-optical modulators in tandem, one arranged to receive a NRZ electrical data signal and the other a clock signal at the data rate of the data signal. The phase difference between the data signal and the clock signal is controlled by adding a first dither signal to a bias signal applied to the modulator receiving the data signal, and a second dither signal, having a different frequency, to the phase difference. The amplitude of variations in the power of the optical output signal corresponding to cross-modulation of the first and second dither signals is detected and the phase difference is controlled in response to the detected amplitude.

Apparatus and method for phase synchronization control in RZ optical transmitter

A method and apparatus for temperature stabilization of a wavelength of a laser compensate for thermal instability of a internal etalon of the wavelength using the results of measuring the wavelength with an external wavelength meter.

Method and apparatus for temperature stabilization of a wavelength of a laser

A method and apparatus for controlling a bias voltage of a Mach-Zehnder modulator (MZM) use a digital pilot signal and a digital correlation technique to produce a feedback signal for adjusting the bias voltage to the quadrature bias point. Embodiments of the invention include apparatuses performing a non-return-to-zero (NRZ), return-to-zero (RZ), or carrier suppressed RZ (CSRZ) high-speed optical modulation.

Growing community of inventors

Bubenreuth, Germany

Siegfried Karl Gronbach