Abstract:
Microelectrodes including an upper surface, two walls, and a polymer core are described. In addition, microelectrodes including a metal thin film are described. Processes for fabricating microelectrodes including providing a substrate including at least one polymer micro-ridge are also described. Processes for fabricating an electro-optic device including providing a substrate including at least two polymer micro-ridges are also described. In addition, a process including reacting an alkoxysilane, an (epoxy)alkoxysilane, and a fluorinated alkoxysilane to form a fluorinated sol-gel polymer, and reacting a nonlinear optical chromophore comprising a donor, a p-bridge, an acceptor, and at least one alkoxysilyl group with the fluorinated sol-gel polymer to form a nonlinear optical fluorinated sol-gel polymer is also described.
Abstract:
An optical to radio frequency detector comprising an optical guide (11 to 14) for receiving two optical singal components having frequencies that differ by an amount corresponding to a radio frequency, and a radio signal guide (15, 16) coupled with an interaction zone (14) of the optical guide for propagating a radio signal from the interaction zone at the radio frequency. the interaction zone (14) of the optical guide comprises an interaction material presenting a second-order non-linear optical polarisation characteristic to the propagatio of the optical singal components, and the radio signal guide (15,16) is in travelling-wave coupling with the interaction zone. the interaction material includes electrically orientated diazobenzene. The radio signal guide (15,16) comprises an electrically conductive strip (15) juxtaposed with and extending along the interaction zone (14) on one side thereof and an electrically conductive ground plane (16) juxtaposed with and extending along the interaction zone (14) on an opposite side thereof.
Abstract:
A self-aligning process for fabricating integrated modulated waveguide structures includes laying a resist mask keyed on a vertical feature of the partially formed structure, and then forming further features based on this mask. This gives the desired waveguide and recessed modulator structure whilst ensuring that the waveguide and the recesses are correctly aligned.
Abstract:
A self-aligning process for fabricating integrated modulated waveguide structures includes laying a resist mask which includes defining features of both the waveguide and surrounding recesses and manipulating this structure via selective etching whilst protected by further resist layers. This gives the desired waveguide and recessed modulator structure whilst ensuring that the waveguide and the recesses are correctly aligned.
Abstract:
An optoelectronic device. The optoelectronic device operable to provide a PAM-N modulated output, the device comprising: M optical modulators, M being an integer greater than 1, the M optical modulators being arranged in a cascade, the device being configured to operate in N distinct transmittance states, as a PAM-N modulator, wherein, in each transmittance state of the N distinct transmittance states, each of the M optical modulators has applied to it a respective control voltage equal to one of: a first voltage or a second voltage.
Abstract:
An optical system includes a transmitter having waveguides defined in a layer of a light-transmitting medium positioned on a base. A portion of the waveguides are transition waveguides that each guides a different transition light signal. The transmitter also includes modulators positioned on the base. Each modulator includes a modulator waveguide that receives one of the transition light signals and guides the received transition light signal through the modulator. The system also includes drive electronics in electrical communication with the modulators. The drive electronics apply electrical energy to each of the modulators such that an electrical field is generated within the modulator waveguide. Each electrical field is generated so as to modulate one of the transition light signals into a modulated signal. The system includes multiple drive paths.
Abstract:
A magneto-optical isolator device is provided. The isolator device includes a substrate and a bottom cladding layer that is formed on the substrate. An optical resonator structure is formed on the bottom cladding layer. The resonator structure includes crystalline or amorphous diamagnetic silicon or silicon-germanium so as to provide non-reciprocal optical isolation. A top cladding layer is formed on the resonator structure. One or more magnetic layers positioned on the top cladding layer or between the top cladding or bottom cladding layers and the optical resonator structure.