Alcatel Lucent

Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Commissariat a L'energie Atomique

Nicolas Chimot

Guang-Hua Duan

Romain Brenot

Vincent Derycke

Jean-Philippe Bourgoin

François Lelarge

Marcelo Goffman

Helene Debregeas-Sillard

Siddharth Joshi

Helen Debregeas-Sillard

Badhise B Bakir

Hélène Debregeas-Sillard

Badhise Ben-Bakir

A tunable laser device comprises a multi-section distributed feedback (DFB) laser having a first Bragg section including a waveguide and a Bragg grating, a second Bragg section comprising a waveguide and a Bragg grating, and a phase section being longitudinally located between the first Bragg section and the second Bragg section. The phase section is made of a passive material, and each Bragg section has a first longitudinal end joining the phase section and a second longitudinal end opposed to the phase section. The Bragg grating of at least one Bragg section has a grating coupling coefficient which decreases from the first longitudinal end to the second longitudinal end of the at least one Bragg section.

Tunable laser device

An emitting device is intended for delivering photons with a chosen wavelength. This emitting device includes an InP substrate with a directly modulated laser arranged for generating photons modulated by a non-return-to-zero modulation to produce data to be transmitted, a passive ring resonator monolithically integrated with the directly modulated laser and having a resonance amongst several ones that is used for filtering a zero level induced by the data modulation, and a tuning means arranged along the directly modulated laser and/or around the ring resonator to tune the photon wavelength and/or the ring resonator resonance used for filtering.

Tunable emitting device with a directly modulated laser coupled to a ring resonator

A nanotube-based flexible field effect transistor and its method of manufacture is provided. The field effect transistor according to the invention comprises at least two contact electrodes, respectively drain and source electrodes, an electrical conduction zone connected to the contact electrodes, said zone comprising a plurality of single-wall carbon nanotubes that are substantially aligned, a gate electrode for controlling the electric current circulating in said zone and a flexible substrate on which the contact and gate electrodes are deposited. The nanotube density in the conduction zone is strictly greater than 10 nanotubes per micrometer.

Carbon nanotube field effect transistor

An optical filtering device () comprising: a ring resonator (); and a multimode interference coupler () comprising two inputs (), two outputs () and a multimode waveguide () connecting the two inputs to the two outputs, the coupler having a first input () serving as an input for the filtering device and able to receive an input optical signal (), and a first output () corresponding to the output of the filtering device and able to produce an output optical signal (),the ring resonator () being arranged so as to connect a second output () of the coupler to a second input () of the coupler,wherein the filtering device comprisesa tuning element () able to modify locally the refractive index in the coupling zone () of said multimode waveguide () in order to vary a coupling coefficient between the coupler () and the ring resonator ().

Ring resonator comprising optical filtering device

Optical transceiver

A wavelength tunable laser emission device () comprises: a first waveguide () comprising an optical amplification means for producing a stimulated light emission, the first waveguide extending in a longitudinal direction of the emission device, a second waveguide () made of silicon on silicon dioxide and disposed parallel to the first waveguide spaced from the first waveguide in a vertical direction of the emission device so as to allow the existence of a hybrid optical mode coupled at one and the same time to the second waveguide and to the first waveguide, the second waveguide comprising a distributed reflector () along the second waveguide, the second waveguide comprising transverse zones () doped differently so as to form a polar junction oriented in a transverse direction of the emission device. Electrodes () coupled to the doped transverse zones modify an effective index seen by the hybrid optical mode.

Tunable laser emission device

Growing community of inventors

Bruyeres le Chatel, France

Nicolas Chimot