| Patent Number |
Title Of Patent |
Date Issued |
| 7397995 |
Multiple-core planar optical waveguides and methods of fabrication and use thereof |
July 8, 2008 |
| A multiple-core planar optical waveguide comprises: a substantially planar waveguide substrate; a lower waveguide core; an upper waveguide core; lower cladding between the substrate and the lower waveguide core; middle cladding between the waveguide cores; and upper cladding above the up |
| 7394954 |
Transverse-transfer of optical power between assembled waveguides |
July 1, 2008 |
| A substantially flat upper cladding surface over a waveguide core facilitates transverse-coupling between assembled waveguides, and/or provides mechanical alignment and/or support. An embedding medium may be employed for securing optical assemblies and protecting optical surfaces the |
| 7379638 |
Optical junction apparatus and methods employing optical power transverse-transfer |
May 27, 2008 |
| An optical apparatus comprises an optical device fabricated on a substrate, an external-transfer optical waveguide fabricated on the substrate and/or on the optical device, and a transmission optical waveguide. The optical device and/or the external-transfer waveguide are adapted for |
| 7373067 |
Multiple-core planar optical waveguides and methods of fabrication and use thereof |
May 13, 2008 |
| 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 substantially surroundi |
| 7366379 |
Optical component for free-space optical propagation between waveguides |
April 29, 2008 |
| An optical component may comprise a horizontal member with two side walls and a substantially transparent end wall protruding from the horizontal member. The end wall, side walls and horizontal member may partially enclose an interior volume, and optical functionality is imparted in any |
| 7269317 |
Optical assemblies for free-space optical propagation between waveguide(s) and/or fiber(s) |
September 11, 2007 |
| An optical apparatus comprises a substrate, first and second transmission optical elements on the substrate, and an optical component (such as an isolator) and focusing optical element(s) on the substrate between the transmission elements. Transmission elements may include planar wav |
| 7233713 |
Etched-facet semiconductor optical component with integrated end-coupled waveguide and methods o |
June 19, 2007 |
| An optical apparatus comprises a semiconductor optical device waveguide formed on a semiconductor substrate, and an integrated end-coupled waveguide formed on the semiconductor substrate. The integrated waveguide may comprise materials differing from those of the device waveguide and |
| 7228032 |
Apparatus and methods for launching an optical signal into multimode optical fiber |
June 5, 2007 |
| The launch conditions (injected beam size/shape, radial/angular offset from the multimode fiber axis) may be varied to preferentially excite certain transverse modes of multimode optical fiber. To reduce multimode dispersion in the fiber, modes are excited having smaller amplitudes near |
| 7227880 |
Grating-stabilized semiconductor laser |
June 5, 2007 |
| A grating-stabilized semiconductor laser comprises a semiconductor laser gain medium, an integrated low-index waveguide, and a waveguide grating segment providing optical feedback for laser oscillation. The laser may be adapted for multi-mode or single-mode operation. A multiple-mode las |
| 7184643 |
Multiple-core planar optical waveguides and methods of fabrication and use thereof |
February 27, 2007 |
| A multiple-core planar optical waveguide comprises: a substantially planar waveguide substrate; a lower waveguide core; an upper waveguide core; lower cladding between the substrate and the lower waveguide core; and upper cladding above the upper waveguide core. At least a portion the |
| 7164838 |
Multiple-core planar optical waveguides and methods of fabrication and use thereof |
January 16, 2007 |
| 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 substantially surroundi |
| 7164825 |
Optical junction apparatus and methods employing optical power transverse-transfer |
January 16, 2007 |
| An optical apparatus comprises an optical device fabricated on a substrate, an external-transfer optical waveguide fabricated on the substrate and/or on the optical device, and a transmission optical waveguide. The optical device and/or the external-transfer waveguide are adapted for |
| 7158702 |
Optical junction apparatus and methods employing optical power transverse-transfer |
January 2, 2007 |
| 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. The first transmis |
| 7148465 |
Semiconductor photodetector with internal reflector |
December 12, 2006 |
| A photodetector comprises a semiconductor substrate with entrance and reflecting faces formed at the substrate upper surface. The reflecting face forms an acute angle with the substrate surface and is positioned so that an optical beam transmitted through the entrance face into the s |
| 7142772 |
Optical component for free-space optical propagation between waveguides |
November 28, 2006 |
| An optical component may comprise a horizontal member with two side walls and a substantially transparent end wall protruding from the horizontal member. The end wall, side walls and horizontal member may partially enclose an interior volume, and optical functionality is imparted in any |
| 7136564 |
Waveguides assembled for transverse-transfer of optical power |
November 14, 2006 |
| Formation of a substantially flat upper cladding surface over a waveguide core facilitates transverse-coupling between assembled waveguides, and/or provides mechanical alignment and/or support. An embedding medium may be employed for securing optical assemblies and protecting optical sur |
| 7095928 |
Surface-mounted photodetector for an optical waveguide |
August 22, 2006 |
| An optical apparatus comprises an optical waveguide, a bottom surface and walls formed on a first substrate and defining a detection volume with an upper opening, and a photodetector active area formed on a photodetector substrate. The bottom surface may be provided with a reflective coa |
| 7050681 |
Optical junction apparatus and methods employing optical power transverse-transfer |
May 23, 2006 |
| An optical apparatus comprises an optical device fabricated on a substrate, an external-transfer optical waveguide fabricated on the substrate and/or on the optical device, and a transmission optical waveguide. The optical device and/or the external-transfer waveguide are adapted for |
| 7031575 |
Optical component for free-space optical propagation between waveguides |
April 18, 2006 |
| An optical component may comprise a horizontal member with two side walls and a substantially transparent end wall protruding from the horizontal member. The end wall, side walls and horizontal member may partially enclose an interior volume, and optical functionality is imparted in any |
| 6992276 |
Semiconductor photodetector with internal reflector |
January 31, 2006 |
| A photodetector comprises a semiconductor substrate with entrance and reflecting faces formed at the substrate upper surface. The reflecting face forms an acute angle with the substrate surface and is positioned so that an optical beam transmitted through the entrance face into the s |
| 6987913 |
Optical junction apparatus and methods employing optical power transverse-transfer |
January 17, 2006 |
| An optical apparatus comprises an optical device fabricated on a substrate, an external-transfer optical waveguide fabricated on the substrate and/or on the optical device, and a transmission optical waveguide. The optical device and/or the external-transfer waveguide are adapted for |
| 6985646 |
Etched-facet semiconductor optical component with integrated end-coupled waveguide and methods o |
January 10, 2006 |
| An optical apparatus comprises a semiconductor optical device waveguide formed on a semiconductor substrate, and an integrated end-coupled waveguide formed on the semiconductor substrate. The integrated waveguide may comprise materials differing from those of the device waveguide and |
| 6981806 |
Micro-hermetic packaging of optical devices |
January 3, 2006 |
| A method for micro-hermetic packaging of an optical device comprises: forming a micro-hermetic cavity on a substrate; providing a transmission optical waveguide transferring optical power between the interior and the exterior of the micro-hermetic cavity; fabricating or mounting at least |
| 6975798 |
Waveguides assembled for transverse-transfer of optical power |
December 13, 2005 |
| Formation of a substantially flat upper cladding surface over a waveguide core facilitates transverse-coupling between assembled waveguides, and/or provides mechanical alignment and/or support. An embedding medium may be employed for securing optical assemblies and protecting optical sur |
| 6942397 |
Packaging for a fiber-coupled optical device |
September 13, 2005 |
| A packaged fiber-coupled optical device comprises an alignment housing with a fiber retainer, optical fiber segment(s), and optical component(s) (on substrate(s) with fiber groove(s)). Upon assembly the protruding end(s) of the fiber segment(s) is/are positioned against the fiber retaine |
| 6917636 |
Grating-stabilized semiconductor laser |
July 12, 2005 |
| A grating-stabilized semiconductor laser comprises a semiconductor laser gain medium, an integrated low-index waveguide, and a waveguide grating segment providing optical feedback for laser oscillation. The laser may be adapted for multi-mode or single-mode operation. A multiple-mode las |
| 6549316 |
Circuit for suppressing noise and distortion in linear fiber optic links |
April 15, 2003 |
| The quality of a multi-channel signal launched into an optical fiber may be degraded by active device distortion as well as non-linear fiber effects. Active device distortion in the form of clipping distortion and interferometric noise are reduced by a laser bias control circuit that |
| 6493132 |
Monolithic optically pumped high power semiconductor lasers and amplifiers |
December 10, 2002 |
| The present invention, a monolithic, high power, single mode electro-optic device is disclosed. The electro-optic device generally includes an electrically pumped device with a pn junction and an optically pumped device evanescently coupled to the electrically pumped device. In opera |
| 6392779 |
Composite second-order bias control schemes |
May 21, 2002 |
| A bias control system is adapted to reduce composite second order distortions in an electro-optic modulator. The bias control system includes a pilot tone generator that generates a first pilot tone at a first frequency and a second pilot tone at a second frequency. The first and sec |
| 6288814 |
In-line predistorter for linearization of electronic and optical signals |
September 11, 2001 |
| An electronic circuit provides a substantially linear output from a nonlinear transmission device such as a laser. The input signal to the nonlinear device is applied to an in-line electrical path coupled to the nonlinear device. In the in-line predistorter of the present invention, |
| 6252693 |
Apparatus and method for reducing impairments from nonlinear fiber effects in 1550 nanometer ext |
June 26, 2001 |
| Nonlinear optical effects, such as stimulated Brillouin scattering, limit the power density of an optical signal that can be launched into an optical fiber. The SBS threshold is increased by a triple frequency modulation scheme, wherein an optical source is modulated by a low frequen |
| 5798854 |
In-line predistorter for linearization of electronic and optical signals |
August 25, 1998 |
| An electronic circuit provides a linear output from a nonlinear transmission device such as a laser. Second and higher order distortion of the nonlinear device is compensated by applying a predistorted signal equal in magnitude and opposite in sign to the real and imaginary component |
| 5515469 |
Fiber optic connector housing |
May 7, 1996 |
| A fiber optic RF signal distribution system has a plurality of antenna stations, each station including an RF antenna. A central RF signal distribution hub receives and transmits signals external to the system. A pair of optical fibers connects each antenna station directly to the di |
| 5457557 |
Low cost optical fiber RF signal distribution system |
October 10, 1995 |
| A fiber optic RF signal distribution system has a plurality of antenna stations, each station including an RF antenna. A central RF signal distribution hub receives and transmits signals external to the system. A pair of optical fibers connects each antenna station directly to the di |
| 5453868 |
Suppression of noise and distortion in fiber-optic systems |
September 26, 1995 |
| Noise and distortion due to scattering and reflection in a fiber-optic communications system are suppressed by modulating the optical frequency of (chirping) a laser light source to broaden the spectrum of the laser light output. The broader spectrum spreads the noise produced by an |
| 5430569 |
Suppression of noise and distortion in fiber-optic systems |
July 4, 1995 |
| Noise and distortion due to scattering and reflection in a fiber-optic communications system are suppressed by modulating the optical frequency of (chirping) a laser light source to broaden the spectrum of the laser light output. The broader spectrum spreads the noise produced by an |
| 5363056 |
Circuit for linearization of amplified electronic signals |
November 8, 1994 |
| An electronic circuit provides a linear output from an amplifying device, such as a hybrid push-pull amplifier, which has inherent distortion. In a preferred embodiment, the distortion of the hybrid amplifier is compensated by nesting a pair of hybrid push-pull amplifiers within a pu |
| 5278688 |
Fault tolerant fiber optic transmission system |
January 11, 1994 |
| A fault tolerant fiber optic system has a plurality of lasers modulated by the same signal source. The signals from the lasers are conveyed to an optical coupler by single mode optical fibers. The signals from all of the lasers are mixed in the optical coupler, producing an output signal |
| 5252930 |
Predistorter for linearization of electronic and optical signals |
October 12, 1993 |
| An electronic circuit provides a linear output from an amplitude modulated transmission device such as an amplifier or a semiconductor laser which has inherent distortion. The distortion of the nonlinear device is compensated by applying a predistorted signal with distortion equal in |
| 5132639 |
Predistorter for linearization of electronic and optical signals |
July 21, 1992 |
| An electronic circuit provides a linear output from an amplitude modulated transmission device such as a semiconductor laser which has inherent distortion. The distortion of the nonlinear device is compensated by applying a predistorted signal equal in magnitude and opposite in sign to |
| 5127072 |
Laser module with compliant optical fiber coupling |
June 30, 1992 |
| A small module for converting an electrical signal to a modulated light signal on an optical fiber comprises a housing, a laser mounted on a laser substrate within the housing, a GRIN lens and an optical isolator downstream from the laser, and a precision capillary for holding an opt |
| 4992754 |
Predistorter for linearization of electronic and optical signals |
February 12, 1991 |
| An electronic circuit provides a linear output from an amplitude modulated transmission device such as a solid state laser which has inherent distortion. The distortion of the nonlinear device is compensated by applying a predistorted signal equal in magnitude and opposite in sign to |
