Lumentum Operations LLC

Gte Telecomunicazioni S.p.a.

U2t Photonics Ag

Stefano Bottacchi

Mauro Oselladore

An optical receiver includes an optical amplifier that is optically connected to a local oscillator (LO) and a plurality of optical hybrid mixers of the optical receiver and that is electrically connected to a controller. The optical amplifier is configured to receive an optical LO signal from the LO, receive a voltage value associated with an optical input signal of the optical receiver, control a power of the optical LO signal based on the voltage value, and provide, after adjusting the power of the optical LO signal, the optical LO signal to the plurality of optical hybrid mixers. The controller, is configured to determine the voltage value associated with the optical input signal and cause the voltage value to be provided to the optical amplifier.

Automatic power control for an optical receiver

The invention inter alia relates to a method of receiving an optical-duo-binary, ODB, signal (S), which has a predefined ODB-transmission bit-rate (B), using a photoreceiver, said method comprising the step of filtering the ODB signal using a filter () which provides a frequency peak in the photoreceiver's frequency response located in the spectral range between 30% and 70% of the predefined ODB-transmission bit-rate.

Method and system for receiving an optical-duo-binary signal

The invention relates to a driver for a semiconductor laser which makes it possible to obtain a high switching rate as well as bias and modulation current control. These objects are achieved with an asymmetric mirror current generator and current variation means using one transistor only.

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Milan, Italy

Stefano Bottacchi