Abstract:
An optical waveguide structure is provided wherein a controller is configured to provide a TE control voltage to a first set of control electrodes in a first electrooptic functional region and a TM control voltage to a second set of control electrodes in a second electrooptic functional region. The TE control voltage and the first electrooptic functional region are configured to alter the TE polarization mode of an optical signal propagating along the waveguide core through the first electrooptic functional region to a substantially greater extent than the TM polarization mode of the optical signal. Further, the TM control voltage and the second electrooptic functional region are configured to alter the TM polarization mode of an optical signal propagating along the waveguide core through the second electrooptic functional region to a substantially greater extent than the TE polarization mode of the optical signal. Additional embodiments and features are disclosed and claimed.
Abstract:
An electro-holographic light field generator device comprises surface acoustic wave (SAW) optical modulators arranged in different directions. Specifically, some embodiments have SAW modulators arranged in pairs, nose-to-nose with each other, and have output couplers that provide face-fire light emission. These SAW modulators also possibly include SAW sense transducers and/or viscoelastic surface material to reduce crosstalk.
Abstract:
The present invention relates to an integrated optical polarization rotator component, comprising three passive unitary polarization rotator cascaded and alternated with two phase shifters, which are adjusted to accurately and robustly provide a given polarization rotation, in order to compensate for manufacturing deviations from a nominal geometry and/or tuning the central wavelength of component to a given value. Thus, increased functionality is provided together with improved fabrication tolerances, possibly through implementing only known and well tested waveguide cross-section geometries and manufacturing processes
Abstract:
The invention relates to a polarisation transformer/PMD compensator chip that is located in a substrate (SUB) in a weak or non-double refractive crystal section with a mode transformation between circular polarisations. The polarisation transformer/PMD compensator chip contains other polarisation actuators in the form of quarter wave plates, which enable the transformation of the polarisation-receiving optical waveguides (PMFA, PMFB) situated upstream or downstream from circular polarisation to a main polarisation. Modules of this type can be cascaded to produce a simple polarisation mode dispersion compensator.
Abstract:
Cellule électro-optique, comportant, sur un substrat (1), une couche de matériau massif ferroélectrique (4), avec une électrode (2) formant plan-masse, prévue entre le substrat (1) et la couche ferroélectrique (4), une autre électrode (5), étroite, montée en regard de la première au dessus de la couche ferroélectrique et des sillons (6) ménagés dans la couche ferroélectrique, de part et d'autre de l'électrode supérieure (5).
Abstract:
An opto-electronic device (1) comprising a directional coupler (11) provided with a first waveguide (1) to receive incoming electromagnetic radiation, said first guide comprising a guiding region (3) of electro-optic material. Moreover, the directional coupler comprises a second waveguide (2) into which can be coupled at least a first portion of said incoming radiation and provided with a port for radiation being output. The opto-electronic device is equipped with a structure for generating (12, 13) a controlling electric field (E RF ) at least inside said first guide (1) of the directional coupler and such as to cause in said electro-optic material polarization conversion of at least part of said incoming radiation. By means of this polarization conversion it is possible to control the power of the radiation being output from the second waveguide, producing a modulator, a changeover switch, an attenuator or an open-or-closed switch.
Abstract:
An optical signal may be received into orthogonal linearly polarized modes of a transmission optical waveguide, the transmission waveguide including first and second transverse-coupling segments thereof. Optical signal polarized along one polarization direction may be substantially completely transferred from the transmission waveguide into a first transverse-coupled waveguide, the first transverse-coupled waveguide being optically transverse-coupled to the first transverse-coupling segment of the transmission waveguide. Optical signalpolarized along the other polarization direction may be substantially completely transferred from the transmission waveguide into a second transverse-coupled waveguide, the second transverse-coupled waveguide being optically transverse-coupled to the second transverse-coupling segment of the transmission waveguide. The optical signals carried by the first and second transverse-coupled waveguides may be combined into a single waveguide. The polarization directions of the transmission waveguide may be rotated about 90° between the first and second transverse-coupling segments
Abstract:
An electro-holographic light field generator device is disclosed. The light field generator device has an optical substrate with a waveguide face and an exit face. One or more surface acoustic wave (SAW) optical modulator devices are included within each light field generator device. The SAW devices each include a light input, a waveguide, and a SAW transducer, all configured for guided mode confinement of input light within the waveguide. A leaky mode deflection of a portion of the waveguided light, or diffractive light, impinges upon the exit face. Multiple output optics at the exit face are configured for developing from each of the output optics a radiated exit light from the diffracted light for at least one of the waveguides. An RF controller is configured to control the SAW devices to develop the radiated exit light as a three-dimensional output light field with horizontal parallax and compatible with observer vertical motion.
Abstract:
An electro-holographic light field generator device is disclosed. The light field generator device has an optical substrate with a waveguide face and an exit face. One or more surface acoustic wave (SAW) optical modulator devices are included within each light field generator device. The SAW devices each include a light input, a waveguide, and a SAW transducer, all configured for guided mode confinement of input light within the waveguide. A leaky mode deflection of a portion of the waveguided light, or diffractive light, impinges upon the exit face. Multiple output optics at the exit face are configured for developing from each of the output optics a radiated exit light from the diffracted light for at least one of the waveguides. An RF controller is configured to control the SAW devices to develop the radiated exit light as a three-dimensional output light field with horizontal parallax and compatible with observer vertical motion.