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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7626661 | Polarization controlling elements The invention relates to a polarization compensating element (PCE) for a liquid crystal, e.g. liquid crystal on silicon (LCoS), display system manufactured using a linearly photo-polymerizable polymer (LPP) for orienting a photo-polymerizable liquid crystal polymer ... | 12/01/2009 |
| 7588817 | Engraved optically variable image device A method and image made by the method is disclosed wherein non-spherical magnetically alignable optical pigment flakes in transparent carrier are applied to a substrate and are aligned by applying a magnetic field to the substrate. The pigment flakes align along mag... | 09/15/2009 |
| 7120364 | Optical modulator and method for polarization bit interleaving The invention relates to optical communications using techniques for providing efficient high speed polarization bit interleaving. One common architecture for high-speed time-division-multiplexing employs two modulators having a same bit rate, wherein two separately... | 10/10/2006 |
| 7081996 | Isolated polarization beam splitter and combiner An isolated polarization beam splitter or combiner, for joining light from different inputs into one common port, and for dividing a beam of light into orthogonal polarizations. In both modes of operation, the splitter/combiner provides isolation preventing transmis... | 07/25/2006 |
| 7058304 | Bi-directional cross-connect Wavelength interleaving cross-connects pass a first optical signal including a first set of optical frequencies in a first direction and a second optical signal including a second set of optical frequencies in a second direction. In one embodiment, the first optical... | 06/06/2006 |
| 7047883 | Method and apparatus for orienting magnetic flakes Apparatus and related methods align magnetic flakes in a carrier, such as an ink vehicle or a paint vehicle to create optically variable images in a high-speed, linear printing operation. Images can provide security features on high-value documents, such as bank not... | 05/23/2006 |
| 7046712 | Laser resistant to internal ir-induced damage Co-doping the gain medium of a diode-pumped infrared laser to make the laser resistant to long-term degradation from high-intensity internal infrared radiation is disclosed. Co-doping the gain medium with ions such as Cr3+ and Ce3+ that make th... | 05/16/2006 |
| 7045370 | Dicing and testing optical devices, including thin film filters A technique for fabricating a plurality of thin film filters (“TFFs”), and other optical devices, from a wafer. A device or TFF wafer is affixed to a carrier having a pattern of notches formed thereon corresponding to a pattern into which the wafer is to be dice... | 05/16/2006 |
| 7039076 | Fiber amplifier system for producing visible light A light source is disclosed having a pulsed laser, a fiber amplifier optically coupled to the pulsed laser, and a nonlinear frequency converting element optically coupled to the fiber amplifier. The pulsed laser, e.g., a passively Q-switched laser, is configured to ... | 05/02/2006 |
| 7035505 | Optical performance monitor An apparatus for monitoring an input optical signal at a plurality of distinct optical frequencies is disclosed wherein a demultiplexing arrayed waveguide grating (AWG) having a plurality of M>1 Vernier input ports is disposed between an optical switch and a photodi... | 04/25/2006 |
| 7031610 | Diffraction-compensated integrated WDM A diffraction-compensated WDM (wavelength division multiplexer) uses TTFs (thin film filters) as concave mirrors. The WDM has a plurality of filter elements for guiding the optical signal along a predetermined optical path, each filter element being transparent to a... | 04/18/2006 |
| 7031060 | Non-moving parts add/drop device The instant invention provides an add/drop device including a wavelength filter, a quarter waveplate disposed on either side of the wavelength filter, and a polarizing beamsplitter disposed on either side of the quarter waveplates. Each polarizing beamsplitter has a... | 04/18/2006 |
| 7029745 | Security articles having diffractive surfaces and color shifting backgrounds A security article includes a light transmissive substrate having a first surface and an opposing second surface, with the first surface having an embossed region with an optical diffraction pattern or a holographic image pattern. A color shifting optical coating is... | 04/18/2006 |
| 7016104 | Wider dynamic range to a FBG stabilized pump The present application relates to a Raman amplifier having an increased dynamic range, and particularly for laser pump sources and a method of pumping Raman fiber amplifiers over a greater dynamic range. In a multi-channel optical system, optical amplifiers must be... | 03/21/2006 |
| 7014326 | Wavelength blocker A wavelength blocker including an input port for launching an input beam of light, first dispersing means for dispersing the input beam of light according to wavelength, an array of independently addressable elements for selectively blocking a portion of the dispers... | 03/21/2006 |
| 7013088 | Method and apparatus for parallel optical interconnection of fiber optic transmitters, receivers and transceivers A multichannel fiber optic module has an electromagnetic shield surrounding high frequency electrical components which is electrically and mechanically coupled to one or more guide rails near edges of a printed circuit board. The one or more guide rails of the print... | 03/14/2006 |
| 7007835 | Solder bonding technique for assembling a tilted chip or substrate A method for solder bonding a photodiode or an array of photodiodes to a substrate, the photodiode(s) tilted at a predetermined angle, uses a pair solder bumps placed on a photodiode chip opposite a corresponding pair of solder pads placed on the substrate. When the... | 03/07/2006 |
| 7006765 | Optical network monitor An optical network monitor and a method for monitoring the optical signals of an optical network including a spectrograph that includes a detector array, a processor and outputs. The network monitor receives an optical input signal which includes individual channels... | 02/28/2006 |
| 7006292 | Multi-cavity optical filter The invention provides a multi-cavity filter, and in particular, a multi-cavity bandpass filter having a predetermined centre wavelength. The filter includes a plurality of cavities, each cavity including two partially reflecting films separated by a layer of dielec... | 02/28/2006 |
| 7006283 | Three-dimensional optical amplifier structure The present invention relates to a multi-pass three-dimensional amplifier structure in which a beam of light traverses an amplifier medium multiple times via distinct multiple paths. The distribution of the multiple paths being such that the volume occupied by the m... | 02/28/2006 |
| 7006280 | Multi-stage filtered optical amplifier A multistage amplifier is disclosed for amplifying light over a wavelength band. A first and second span of amplifying fiber are optically coupled and a gain flattening filter (GFF) in-line with one of two spans of amplifying fiber is provided for attenuating certai... | 02/28/2006 |
| 7005178 | Security articles having diffractive surfaces and color shifting backgrounds A security article includes a light transmissive substrate having a first surface and an opposing second surface, with the first surface having an embossed region with an optical diffraction pattern or a holographic image pattern. A color shifting optical coating is... | 02/28/2006 |
| 7004647 | Optical transceiver bail latch The invention relates to a bail latching device for an opto-electronic transceiver, including a pivotal latching member and a bail. The bail includes ends extending at an acute angle from a plane defined by the side arms for pivoting the latching member when the bai... | 02/28/2006 |
| 7002128 | Laser diode driving circuit with safety feature The invention relates to a feedback loop for a laser diode driving circuit for ensuring that the laser diode generates optical power at a constant safe level. The feedback loop includes a monitor diode, which generates a monitor current Imon, and a set re... | 02/21/2006 |
| 7002131 | Methods, systems and apparatus for measuring average received optical power Methods, systems and apparatus for measuring average received optical power by an optical receiver. A TO-package for a packaged optical receiver is disclosed having a pin-out configuration for facilitating the direct measurement of the level of photo current induced... | 02/21/2006 |
| 7003230 | Coupling mechanism for an optical transceiver housing An optical transceiver providing a carrier; a cover couplable to a portion of the carrier to define a transceiver enclosure; and, an electro-optical assembly supported in the enclosure is provided. A coupling mechanism and cooperating structure are particularly adap... | 02/21/2006 |
| 6997981 | Thermal control interface coatings and pigments The invention provides an optical structure with low chroma and brightness in the visible region and low emissivity in the infrared region. The optical structure includes an interference structure having an infrared reflective layer and an infrared absorbing thin fi... | 02/14/2006 |
| 6994478 | Modules having rotatable release and removal lever Rotate-and-pull mechanisms for fiber optic modules. The rotate-and-pull mechanisms have a lever-actuator to unlatch and withdraw a fiber optic module from a cage assembly or a module receptacle. The lever-actuator pivotally couples to the fiber optic module so that ... | 02/07/2006 |
| 6995900 | Method of making a short-pass fiber with controlled cut-off wavelength A method of producing a short-pass fiber by drawing a preform for a depressed cladding fiber at a predetermined drawing ratio. The preform has a core of refractive index n0, a depressed cladding surrounding the core and having a refractive index n1 | 02/07/2006 |
| 6996140 | Laser device for nonlinear conversion of light A laser apparatus for nonlinear conversion of light is disclosed utilizing a laser diode having a reflective back facet and a front facet having a reflectance of less than about 1% for emitting a multifrequency optical beam, and a nonlinear optical element for recei... | 02/07/2006 |
| 6991860 | Titanium-containing interference pigments and foils with color shifting properties Interference pigment flakes and foils are provided which have color shifting properties. The pigment flakes can have a symmetrical coating structure on opposing sides of a reflector layer, can have an asymmetrical coating structure with all of the layers on one side... | 01/31/2006 |
| 6987590 | Patterned reflective optical structures An optical structure includes a light transmissive substrate having a surface relief pattern applied thereon, such as a hologram. A patterned layer of a reflective material is applied over portions of the surface relief pattern so as to form alphanumeric characters,... | 01/17/2006 |
| 6979704 | Optical polymer blend with bimodal particle sizes An optical polymer blend includes sub-wavelength particles to modify the refractive index of a polymer to match the refractive index of micro-particles added to adjust the bulk coefficient of thermal expansion of the blend. A relatively large amount of material may ... | 12/27/2005 |
| 6974265 | Fiber optic modules with de-latching mechanisms having a pull-action Fiber optic modules having a pull-actuator to unlatch and withdraw (i.e. unplug) it from a cage assembly or a module receptacle. The pull-actuator includes a pull-tab, an arm or push rod, and a catch to couple to a pivot-arm actuator. The pivot-arm actuator pivotall... | 12/13/2005 |
| 6971747 | Image display device having a compensating prism group A color management system for use with projection displays includes, for example, a separating polarizing beamsplitter, a compensating prism group, an image assimilator, and a combining polarizing beam splitter. In accordance with an exemplary embodiment, the separa... | 12/06/2005 |
| 6969205 | Optical fiber pigtail assembly A fiber tail assembly (FTA) with a micro-lens formed in the fiber tip is used to couple the laser light out of the package and along the fiber. The FTA is soldered at two points where metallized bands are deposited on the fiber pigtail, one at a fiber mount near the... | 11/29/2005 |
| 6970236 | Methods and systems for verification of interference devices An automated verification system for authenticating an object having an interference security device or feature includes an electromagnetic radiation source capable of generating one or more electromagnetic radiation beams, a transport staging apparatus adapted to p... | 11/29/2005 |
| 6963684 | Multi-band arrayed waveguide grating with improved insertion loss and wavelength accuracy A planar lightwave circuit generalized for handling any given band of multiple bands of a wavelength range, including a first grating element handling a first group of bands; and a second grating element handling a second group of bands. The first and second groups ... | 11/08/2005 |
| 6963681 | Automatic raman gain control The invention relates to a method for automatic dynamic gain control in optical Raman amplifiers and an optical Raman amplifier adapted for the same. The present invention has found that in multiple pump Raman amplifiers a substantially linear relationship exists be... | 11/08/2005 |
| 6961166 | Optical digital external modulator An optical digital external modulator having a cascaded arrangement of interferometers is provided. The optical modulator includes an electrode structure for applying an electric field to each interferometer in the cascade and biasing circuitry coupled to the electr... | 11/01/2005 |
