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7409132 |
Plastic waveguide for terahertz wave
The invention discloses a plastic waveguide for guiding terahertz (THz) wave with a wavelength ranging from 30 to 3000 μm. The plastic waveguide includes a core and a cladding layer. At least part...
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RE40271 |
Echelle grating dense wavelength division multiplexer/demultiplexer
An apparatus for use in optical communication systems to multiplex/demultiplex an optical signal consisting of an optical channel(s) of distinct wavelength(s) having a select channel spacing within...
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7136553 |
Tunable demultiplexer and tunable laser with optical deflector
Provided are a tunable demultiplexer and a tunable laser, having an optical deflector in which a refractive index of a core layer of a deflection pattern region having a predetermined shape varies...
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6987591 |
Volume hologram
A volume hologram for modifying a characteristic of an input microwave beam and a method for manufacturing thereof are disclosed. The hologram is fabricated from a multi-layer artificial dielectric...
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6862092 |
Spectrometer
A method and apparatus for measuring spectral information of light from at least one object includes at least one light detector and at least one transparent body. The transparent body has a front...
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6816648 |
Integrated waveguide gratings by ion implantation
Integrated semiconductor waveguide gratings, methods of manufacture thereof and methods of apodizing thereof are described. A semiconductor waveguide grating includes a substrate, a cladding layer...
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6647182 |
Echelle grating dense wavelength division multiplexer/demultiplexer
An apparatus for use in optical communication systems to multiplex/demultiplex an optical signal consisting of an optical channel(s) of distinct wavelength(s) having a select channel spacing within...
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6522797 |
Seismic optical acoustic recursive sensor system
A marine seismic fiber optic acoustic sensor system having internal mirrors with a low reflectivity written into the fiber to form a series of continuous, linear sensors incorporated in a single...
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6519063 |
Planar wave length multiplexer/demultiplexer
The present invention relates to a planar wave guide structure having a grating element fabricated thereon as well as a focusing element therein. The lens element of the present disclosure is...
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6516117 |
Grating and method and apparatus for forming same
A grating formation method comprises the steps of accelerating ions; causing the accelerated ions to pass through a mask having a shape corresponding to the grating; and implanting the ions, which...
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6483964 |
Method of fabricating an optical component
An optical component comprising one or more optical elements ( 35 ′) aligned with the end(s) of one or more waveguides ( 25 ′) is fabricated by a process in which, first of all, a doped silica...
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6415080 |
Echelle grating dense wavelength division multiplexer/demultiplexer
A dense wavelength multiplexer/demultiplexer (“DWDM”) for use in optical communication systems includes a multiplex optical waveguide propagating a plurality of optical channels of a select...
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6304692 |
Echelle grating dense wavelength division multiplexer/demultiplexer with two dimensional single channel array
A dense wavelength multiplexer/demultiplexer for use in optical communication systems using optical signals in a select near infrared wavelength range and a select channel spacing includes at least...
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6303934 |
Monolithic infrared spectrometer apparatus and methods
A spectrometer system comprises (i) a slab waveguide characterized as an index of refraction higher than a surrounding medium, and having front surface and a rear surface opposite thereto, the...
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6275630 |
Compact double-pass wavelength multiplexer-demultiplexer
An optical multiplexing and demultiplexing device including a fiber mounting assembly for aligning optical fibers, a set of collimating and focusing optics, a transmission grating element, and a...
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6115518 |
Optical waveguide Bragg reflection gratings
An optical waveguide Bragg grating spectrally selective reflector is made by ion beam implantation through a photolithographic mask to raise locally the effective refractive index of the guide....
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