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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 7945166 | Independent upstream/downstream bandwidth allocations in a common hybrid telecommunications network A network interface apparatus comprises a bidirectional optical signal port, an optical diplexer connected to the bidirectional optical signal port, a first RF signal port (bidirectional), a second RF signal port, a first RF diplexer, and an RF splitter. The RF dipl... | 05/17/2011 |
| 7945132 | Laser and photodetector coupled by planar waveguides An optical apparatus comprises: a waveguide substrate; three planar optical waveguides formed on the substrate, each comprising a transmission core and cladding; a laser positioned to launch its optical output to propagate along the first waveguide; a photodetector ... | 05/17/2011 |
| 7943894 | Optical element for free-space propagation between an optical waveguide and another optical waveguide, component, or device An optical element comprises a substantially transparent material having opposing first and second transmission surfaces and a substantially flat mounting surface between them, an alignment mark, and an optical coating. The optical element is mounted self-supporting... | 05/17/2011 |
| 7943229 | Suppression of stray light propagation in a substrate An optical apparatus comprises: a substrate; an optical device, an optical waveguide, or an optical element on the first substrate surface; a reflection-suppressing layer on a second substrate surface opposite the first substrate surface; and an absorbing layer on t... | 05/17/2011 |
| 7885499 | Optical junction apparatus and methods employing optical power transverse-transfer A method comprises: (i) forming a first optical waveguide on a first substrate; (ii) forming a second, structurally discrete optical waveguide on a structurally discrete second substrate; (iii) assembling the second substrate or second optical waveguide with the fir... | 02/08/2011 |
| 7853103 | Optical junction apparatus and methods employing optical power transverse-transfer A method comprises: forming an optical device on a device substrate; forming a first optical waveguide on the device or device substrate; forming a second, structurally discrete optical waveguide on a structurally discrete waveguide substrate; and assembling the opt... | 12/14/2010 |
| 7817882 | Etched-facet semiconductor optical component with integrated end-coupled waveguide and methods of fabrication and use thereof An optical apparatus comprises: a semiconductor substrate; a semiconductor optical device integrally formed on the substrate and having an off-normal device end face; and a low-index planar optical waveguide integrally formed on the semiconductor substrate at the de... | 10/19/2010 |
| 7813604 | Laser and photodetector coupled by planar waveguides An optical apparatus comprises: a waveguide substrate; three planar optical waveguides formed on the substrate, each comprising a transmission core and cladding; a laser positioned to launch its optical output to propagate along the first waveguide; a photodetector ... | 10/12/2010 |
| 7783146 | Optical junction apparatus and methods employing optical power transverse-transfer Discrete first and second optical transmission subunits are formed each having a corresponding transmission optical waveguide with a corresponding optical junction region. The first transmission optical waveguide is a planar optical waveguide formed on a substrate. ... | 08/24/2010 |
| 7711272 | Laser source for a passive optical network A method comprises: receiving a RF signal; providing a RF signal level; varying a laser power DC set point linearly with the RF signal level over a selected range; and modulating with the RF signal laser output power about the DC set point. The RF signal level can b... | 05/04/2010 |
| 7646957 | Multiple-core planar optical waveguides and methods of fabrication and use thereof A multiple-core optical waveguide comprises: a substrate; lower and upper waveguide core layers; a waveguide core between the upper and lower waveguide core layers; upper and lower cladding; and middle cladding between the upper and lower waveguide core layers subst... | 01/12/2010 |
| 7625132 | Packaging for a fiber-coupled optical device A segment of optical fiber is engaged with a fiber groove on a device substrate, which positions the fiber segment for optical coupling with an optical component on the substrate. A fiber retainer maintains the fiber segment in engagement with the groove. The fiber ... | 12/01/2009 |
| 7622708 | Optical element for free-space propagation between an optical waveguide and another optical waveguide, component, or device An optical element comprises a substantially transparent material having opposing first and second transmission surfaces and a substantially flat mounting surface between them, an alignment mark, and an optical coating. The optical element is mounted self-supporting... | 11/24/2009 |
| 7599585 | Etched-facet semiconductor optical component with integrated end-coupled waveguide and methods of fabrication and use thereof An optical apparatus comprises: a semiconductor substrate; a semiconductor optical device integrally formed on the substrate and having a device end face; and a low-index planar optical waveguide integrally formed on the semiconductor substrate at the device end fac... | 10/06/2009 |
| 7577327 | Optical junction apparatus and methods employing optical power transverse-transfer An optical apparatus comprises an optical device formed on a device substrate, a first optical waveguide formed on the substrate or on the optical device, and a second, mechanically discrete optical waveguide assembled with the device substrate, optical device, or f... | 08/18/2009 |
| 7543993 | Fiber-coupled optical device mounted on a circuit board An optical apparatus comprises: an optical fiber, an optical device on a substrate, a circuit board, and an electrical connection therebetween. The substrate has a groove for positioning the fiber for optical coupling with the optical device. A proximal segment of t... | 06/09/2009 |
| 7542638 | Optical assemblies for free-space optical propagation between waveguide(s) and/or fiber(s) An optical apparatus comprises segments of a GRIN optical medium mounted on a substrate in at least one groove thereon. The GRIN segments are longitudinally spaced apart from one another on the substrate, and are arranged so that a free-space optical beam received t... | 06/02/2009 |
| 7542636 | Optical assemblies for free-space optical propagation between waveguide(s) and/or fiber(s) An optical apparatus is made by mounting segments of a GRIN optical medium on a substrate in at least one groove thereon. The GRIN segments are longitudinally spaced apart from one another on the substrate, and are arranged so that a free-space optical beam received... | 06/02/2009 |
| 7492024 | Reflector for a double-pass photodetector An apparatus comprises: a substrate; a photodetector formed on an area of a surface of the substrate; an electrical contact formed on a portion of the photodetector; and a reflector formed over a portion of the photodetector distinct from the portion of the photodet... | 02/17/2009 |
