Alcatel Lucent

Alcatel

Alcatel N.v.

Nokia Solutions and Networks Oy

Jean-Guy Provost

Alexandre Shen

Bernd Sartorius

Fabrice Devaux

Romain Brenot

Tolga Tekin

Dominique Lesterlin

Michael Schlak

Sophie Barbet

Cristopher Janz

Jerome Langanay

A system for optical linear sampling and coherent detection of an optical signal OS comprises a source emitting a pulsed optical signal SP and an optical coupler that splits the pulsed optical signal SP into two replicas, the first replica of the pulsed optical signal SP is sent to a first optical hybrid circuit and the second replica of the pulsed optical signal SP is send to a second optical hybrid circuit, a source emitting an optical signal OS and optical coupler that splits the incoming optical signal OS into two replicas, the first replica of the incoming optical signal OS is sent to the first optical hybrid circuit and the second replica of the incoming optical signal OS is sent to a wavelength recovery device WVLR, whose output is a continuous-waveform optical signal CW at the central wavelength of the incoming optical signal OS, which sends it to the second optical hybrid circuit. such that the optical signal OS is sampled within the first hybrid circuit and the continuous waveform optical signal CW is sampled in the second hybrid circuit, and a device BDADC comprising balanced photodectors detecting optical signals at the output of the two optical hybrid circuits and an analog/digital converter ADC.

System for optical linear sampling and coherent detection of an optical signal

An optical device for the differentiation of a first optical signal and an optical signal lagging behind the first, in which the differentiation is represented by a signal carried by a continuous wave passing through the two arms of an interferometer including media with an index that depends on the optical power passing through them. The delayed signal is the first signal fed back to one of the arms through a delay.

Optical differentiation device

An electro-optical semiconductor modulator includes two successive segments (SA, SD) each of which applies both attenuation and a phase shift to a light wave (12) in response to a control voltage for controlling the segment. The two segments belong to the same structure having multiple quantum wells. A control generator (4) develops the AC components of the two control voltages (MA, MD) respectively in the form of two different combinations of a reference attenuation (A) and of a reference phase shift (D) to be applied to the light wave (12). The control generator also supplies two DC components (VA, VD) of the control voltages with two different values that are chosen so as to enable the two combinations to actually apply the attenuation (A) and the phase shift (D) to the wave. The invention is applicable in particular to implementing an optical link having a high data-rate.

Electro-optical semicoductor modulator, and an optical link including

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Palaiseau, France

Jean-Guy Provost