Orange

France Telecom

Alcatel Lucent

France Telecom Sa

Philippe Chanclou

Monique Thual

Fabienne Saliou

Jean Lostec

Pierre Sansonetti

Carlos Luis De Barros

Lionel Provost

Philippe Gravey

Naveena Genay

Philippe Guignard

Laurent Guillo

Anna Pizzinat

Bertrand Le Guyader

Michel Gadonna

Gaël Simon

Benoit Charbonnier

Jean-Luc Courant

Arnaud Laurent

Julien Poirrier

Qian Deniel

Maryse Moignard

Franck Payoux

Benoît Charbonnier

An optronic transceiver module is disclosed. The optronic transceiver module includes an m to n main optical coupler capable of splitting a downlink signal into n downlink optical signals of the same power to be transmitted in n optical fibres, a first uplink optical coupler capable of splitting an uplink signal into two optical signals split according to a predetermined reference power ratio and delivering a low-power signal and a high-power signal, a first power measurement photodiode delivering a power measurement associated with a first low-power signal, the main optical coupler being capable of aggregating the high-power optical signal and a second uplink optical signal representative of an optical signal received via a second optical fibre, into an aggregated uplink optical signal.

Optronic transceiver module

A device for coherent detection of data transported in an optical incoming useful signal. The device includes: a first incoming single-mode optical fibre, injecting the incoming useful signal; a second incoming single-mode optical fibre, injecting an optical signal of optical frequency substantially equal to that of the incoming useful signal, referred to as an oscillation signal, a signal mixer in which one of the signals from the first or second fibre is separated into two signals having orthogonal polarisations, and where the other one of the signals from the first or second fibre is mixed with the two separate signals, producing a mixed signal; a detector of the transported data present in the mixed signal; and an amplitude modulator configured to modulate the oscillation signal before it enters the mixer, the modulation pattern having repetitive pulses of the same interval as a symbol time of the incoming useful signal.

Coherent detection with optimised local oscillator

An optronic transceiver module capable of implementing an optical bidirectional communication of the point to point type via at least one main optical fibre is disclosed. The optronic transceiver module includes a first optical module for supervising an uplink signal received via the main optical fibre delivering a first supervision result, a first optical module for switching the bidirectional communication via the main optical fibre to a bidirectional communication via a backup optical fibre, and vice versa, the first optical switching module being controlled by the first optical supervision module depending on the first supervision result delivered.

Optronic transceiver module with integrated protection

A device for inserting a plurality of optical beams into a single-mode optical fibre, a guiding structure of which is composed of a core with a first refractive index, a cladding with a second refractive index, and a coating with a third refractive index. The device includes an optical mixer configured to insert, into the single-mode optical fibre, the plurality of optical beams, at least one of which has a distribution of its radial and angular electromagnetic amplitude with a maximum amplitude peak in the cladding.

Augmented multimodal spatial optical-fibre modes

A device for coherently detecting data in an optical signal, called a useful signal, received over a first single-mode optical fibre. The device includes: a second single-mode optical fibre that receives an oscillation optical signal; a polarization-managing device that receives as input either, in a first case, the oscillation optical signal, or, in a second case, the useful signal, and that delivers as output two separate signals, over two single-mode optical guides. The coherently detecting device is configured so that a set of the three signals, which consists of the two separate signals and of either, in the first case, the useful signal, or, in the second case, the oscillation signal, is presented to a single photodiode.

Device for coherently detecting in a simplified way and without optical loss

A transmission system includes: an optical transmission module capable of modulating a first digital radio signal in order to obtain a first optical signal; an optical reception module capable of receiving a second optical signal and demodulating same in order to obtain a demodulated radio signal; and a digitizing module capable of digitizing the demodulated radio signal in order to obtain a second digital radio signal. The transmission module includes: a module for adding a first management signal to the first digital radio signal, the rate of the first management signal being less than that of the first digital radio signal. The optical digitizing module includes an extraction module capable of extracting a second management signal from the demodulated radio signal, the rate of the second management signal being less than that of the second digital radio signal.

Transponder for a radio-over-fibre transmission system allowing retransmission from the antenna management interface

A method is provided for generating a plurality of electrical signals from polychromatic optical signals extracted from a set of optical fibers, a polychromatic signal including a plurality of predetermined wavelengths. An electrical signal is generated by using predetermined wavelengths. The method includes: grouping the extracted optical signals together into a polychromatic optical signal beam; separating the polychromatic signal beam into a plurality of monochromatic optical signal beams; and converting the plurality of separated monochromatic optical signal beams into the plurality of electrical signals.

Method and device for generating electrical signals corresponding to a wavelength, from polychromatic optical signals

The invention relates to an optoelectronic transceiver device comprising a first optical connector (OC) capable of connection to a first bidirectional optical fiber (OF), and a second optical connector (OC) capable of connection to a second bidirectional optical fiber (OF), the device further comprising: an insertion-extraction module (ADM) capable of: extracting a wavelength (&#x3bb;) from a plurality of wavelengths constituting a first optical signal received by the first optical connector (OC) and transmitting the first optical signal without the extracted wavelength to the second optical connector (OC); inserting a wavelength (&#x3bb;) into a second optical signal received by the second optical connector (OC) and transmitting the second optical signal with the inserted wavelength to the first optical connector (OC); an electric-optical conversion module (EC) capable of providing the insertion-extraction module with the wavelength (&#x3bb;) inserted into the second optical signal from an incoming electric signal (Data Tx); and an optical-electric conversion module (EC) capable of converting the wavelength (&#x3bb;) extracted from the first optical signal by the insertion-extraction module into an outgoing electric signal (Data Rx).

Cascade-form wavelength division multiplexing optoelectronic transceiver device, system and method

A reflective light-emitting device is provided for a WDM PON optical access network. The device includes a light source with an optical gain medium. The light-emitting device includes a light source with an optical gain medium, of wavelength that is self-seeding during a go-and-return passage of light between the optical gain medium and an optical reflective component defining the laser cavity. The optical reflective component is made up of an optical amplifier associated reflective optical connection to a polarizing device so that the polarization axis of the reflected light is the same as the polarization axis of the emitted light.

Reflective light-emitting device for a WDM PON optical access network, the device including a light source with an optical gain medium

A method and device are provided for protecting a passive optical network including an optical-line terminal connected to a plurality of optical network terminals grouped set-wise. The method includes: obtaining a transmission schedule of the optical network terminals; comparing, by set, the schedule with the signals transmitted by the optical network terminals, and, if at least one optical network terminal of an assembly does not transmit in synchronization with the schedule, disconnecting the assembly.

Method for protecting a PON from photoreceiver overload by an ONT

The invention relates to a receiving device (Rx_) capable of receiving an optical signal emitted by an emitting device including a light source for emitting the optical signal, the optical signal being transmitted by a passive optical network having wavelength division multiplexing, the receiving device including: an optical amplifier (Amp_b) for amplifying the optical signal received from the emitting device; an optical detector (D_b) capable of detecting data in the amplified optical signal; an optical reflector (Ref_b) configured to return the amplified optical signal toward the emitting device, such as to tune the wavelength of the optical signal emitted by the emitting device by means of a round trip of the optical signal between the emitting device and the optical reflector.

Reflecting method and device for performing the receiving function of an optical access network using wavelength division multiplexing

An optical telecommunications network terminal includes a device for generating downlink optical signals and a device for receiving uplink optical signals, the optical signals being conveyed in optical transmission means connected to the terminal. More particularly, the generator device is adapted to generate a continuous optical signal at wavelength &#x3bb;ii and having an initial power greater than a power threshold for the occurrence of a stimulated Brillouin effect, above which threshold said continuous optical signal induces in the optical transmission means a continuous Brillouin backscattering uplink optical signal at wavelength &#x3bb;'ii. The optical signal receiver device further includes means for analyzing the power of said continuous Brillouin backscattering optical signal at wavelength &#x3bb;&#x2032;ii.

Optical telecommunications network terminal, an installation including the terminal, and a method of detecting a break in optical transmission means

A multiservice private network and interface modules (M-M). Each of said modules is dedicated to interfacing a specific terminal equipment (T-T, GTW;-) in the multiservice private network. The interface modules (M-M) are connected to the terminal equipment on a one-to-one basis. Each interface module (M-M) is configured to send and/or receive data in a format adapted to the terminal equipment to which it is connected, at a specific wavelength, in order to interconnect, via said private network, at least two mutually compatible terminal equipments among all the terminal equipments. This arrangement is typically applicable in particular to interconnecting, via a common network, heterogeneous different terminal equipments, so that the mutually compatible terminals communicate directly with one another without interfering with communication between other terminals of a different type.

Multiservice private network and interface modules for transporting, on such a network, data in different formats

An in-fiber mode converter comprises fiber portions () constituting an input microlens, a fiber portion () constituting a phase shifting region adapted to convert a propagation mode of an optical signal into another propagation mode, and fiber portions () constituting an output microlens. The fiber portions are spliced, the converter is compact and losses are minimized relative to mode conversion in free space.

Mode converter

A line attenuation device for monomode fibers having at least one attenuating element with at least one graded-index multimode fiber section placed between two monomode fibers and coupled to at least one coreless silica fiber section.

Growing community of inventors

Lannion, France

Philippe Chanclou