Abstract:
One or more lasers are combined with optical energy transfer devices and energy guiding devices which use an electric field for control. The optical energy transfer devices may form grating, mirrors, lenses, and the like using a class of poled structures in solid material (1460). The poled structures may be combined with waveguide structures (1476). Electric fields applied to the poled structures control routing, reflection and refraction of optical energy. Adjustable tunability is obtained by a poled structure (1478, 1480) which produces a spatial gradient in a variable index of refraction along an axis (1489) in the presence of a variable electric field.
Abstract:
A flat panel display (1001) is based on a new switching technology for routing laser light from a laser light source (1000) through an array of optical energy routers (1008) among a set of optical waveguides (1014) and coupling light toward the viewer. The switching technology is based on poled electro-optic structures. The display technology is versatile enough to cover application areas spanning the range from miniature high resolution computer display to large screen displays for high definition television (HDTV) formats. The invention combines the high brightness and power efficiency inherent in visible semiconductor diode laser sources with a new waveguide electro-optical switching technology to form a dense two-dimensional addressable array of high brightness light emissive pixels.
Abstract:
A projection display is based on a new switching technology for routing laser light among a set optical waveguides (1147, 1149) and coupling that light toward the viewer. The switching technology is based on poled electro-optical structures (66, 68). The display technology is versatile enough to cover application areas spanning the range from miniature high resolution computer displays to large screen displays for high definition television formats. The invention combines the high brightness and power efficiency inherent in visible semiconductor diode laser sources with a new waveguide electro-optical switching technology to form a dense two-dimensional addressable array of high brightness light emissive pixels. This invention provides an all solid-state, full color, high resolution projection display suitable for displaying computer generated information and full motion HDTV.
Abstract:
Method for optical energy transfer and energy guidance uses an electric field (34) to control energy propagation (44) using a class of poled structures (39) in solid material (25). The poled structures, which may form gratings in thin film or bulk configurations, may be combined with waveguide structures. Electric fields are applied to the poled structures to control routing of optical energy. Techniques include frequency-selective switchable- and adjustable-tunable reflection, splitting, directional coupling, frequency-tunable switching and efficient beam combining, as well as polarized beam combining. Adjustable tunability is obtained by a poled structure which produces a spatial gradient in a variable index of refraction along an axis in the presence of a variable electric field. In one embodiment, the present invention is a method of switching a grating (48) which consists of a poled material with an alternating domain structure of specific period. When an electric field is applied across the periodic structure, a Bragg grating is formed by the electro-optic effect, reflecting optical radiation with a certain bandwidth around a center wavelength.
Abstract:
A new class of energy interaction devices, particularly optical energy transfer devices and energy guiding devices, use an energy field, particularly an electric field, applied to a poled structure to control energy propagation in a solid material. The poled structures, which may form gratings in thin film or bulk configurations, may be combined with waveguide structures to guide energy beams such as optical or acoustic beams. Electric fields applied to the poled structures, such as electrically-activated gratings, control routing of optical energy. Optical devices include but are not limited to, frequency-selective switchable- and adjustably-tunable reflectors, splitters, directional couplers, frequency-tunable switches and efficient beam combiners, as well as polarized beam combiners, AM and FM modulators, mode selectors, energy transfer devices, optical data readers, panel display devices, and waveguide/reflector switching arrays. Variable reflectivity in a grating and adjustable tunability is obtained by a poled structure under the influence of an adjustable field, producing a spatial gradient in an adjustable propagation velocity in the solid material.
Abstract:
A laser cavity (90) configuration employs a mode reshaping structure (430) in a solid state waveguide (132). The mode reshaping may be by means of an adiabatic taper (430). Polarization switching may be employed in connection with the mode reshaping to obtain a high output power in a single transverse spatial mode from an integrated external cavity multiple mode diode laser device (440). The structure provides stabilization and rapid tuning (120) of the frequency of the diode laser, as well as use substantially all of the avalaible power of the diode laser operating mode. Various configurations and combinations are described. An advantage is that an integrated structure can provide output of the laser in a waveguide (132) with single mode for subsequent applications. The external cavity diode laser (90) according to the invention is consistent with a planar manufacturing process such that high-volume, low-cost products can be achieved.
Abstract:
A new class of optical energy transfer devices (11) and energy guiding devices uses an electric field to control energy propagation using a class of poled structures (36, 38) in solid material. The poled structures (36, 38), which may form gratings in thin film or bulk configurations, may be combined with waveguide structures. Electric fields applied to the poled structures through electrodes (24, 26) control routing of optical energy. Devices include splitters, parallel and Y couplers, mode converters and energy leakage attenuators.
Abstract:
A laser cavity configuration (90) employs polarization switching to obtain a high output power in a single transverse spatial mode (110) from an integrated external cavity diode laser (90) device. The structure provides stabilization and rapid tuning (120) of the frequency of the diode laser (90). An advantage is that an integrated structure provides output of the laser in a waveguide (132) with the correct polarization for subsequent applications while supporting optimal polarization in a solid state active medium (100). The external cavity diode laser (90) according to the invention is consistent with a planar manufacturing process such that high volume, low cost products can be achieved.
Abstract:
Optical energy tranfer devices and energy guiding devices (700, 770) use an electric field to control energy propagation using a class of poled structures in solid material in a channel dropping filter and splitter applications. The poled structures, which may form gratings (706, 753) in thin film or bulk configurations, may be combined with waveguide structures (712, 713, 752, 772). Electric fields applied to the poled structures control routing of optical energy. In a particular embodiment, an electrode (710) confronts a solid material and bridges at least two elements of a grating (706) disposed transverse of two wavegide segments (712, 713) and overlaps evanescent fields of optical energy in one of the waveguide segments. A switchable grating (706) may be used by itself, or in combination with other gratings to form integrated structures.
Abstract:
A poled dielectric substrate is fabricated by creating a uniform potential, such as a ground by means of an electrode surface, adjacent a first surface of a polable dielectric material (6), such as a piezoelectric or lithium niobate, and then applying an electric field (20) adjacent a second surface of the polable dielectric material (8), where the electric field is spatially-modulated according to a three-dimensional modulation pattern with a field amplitude level at selected locations sufficient to cause atomic rearrangement within predefined regions in the polable material, and where the modulation pattern is controlled according to a modulation parameter. The control mechanism of modulation amplitude level may be protrusions of an electrically conductive material (15) extending toward the polable material or by modulated variation in the dielectric constant of a dielectric material separating the polable material from an electrode plate.