| Patent Number |
Title Of Patent |
Date Issued |
| 6438297 |
Assembly of optical component and optical fibre |
August 20, 2002 |
| The optical component (4) is mounted on an optical chip in alignment with an optical fibre (1) which is mounted within a V-groove (2) formed in the chip, the optical component (4) has two non-parallel location surfaces (4A, 4B) which abut against corresponding location features (5, 6) on |
| 6431766 |
Method of alignment in an optoelectronic assembly |
August 13, 2002 |
| The invention provides a method of generating an alignment feature (200, 300) in an optoelectronic assembly (10, 700) which enables another part, for example an optical fibre (80), external to the assembly to be aligned to a device (40, 400) within the assembly (10, 700) but without need |
| 6415066 |
Thermally isolated silicon layer |
July 2, 2002 |
| An integrated optical circuit is formed in a silicon layer and supported on a substrate, and a portion of the silicon layer is substantially thermally isolated from the substrate by extending over a recess in the substrate, e.g. in the form of a bridge. Temperature control means are prov |
| 6393184 |
Optical link between electrical circuit boards |
May 21, 2002 |
| A method of providing a point to point connection between two electrical circuit boards (23, 23') in which a plurality of pairs of optical transceivers are provided, one transceiver of each pair being formed on a first silicon-on-insulator chip (2) in electrical contact with a first |
| 6327396 |
Optical waveguide having an optically decoupled modulator region |
December 4, 2001 |
| An optical waveguide, such as a rib waveguide, having a first portion (7) to which a dopant (9) and/or a metal layer (10) is applied to enable an optical property of a second portion of the waveguide to be altered, the first portion (7) having a structure, e.g. being corrugated, the geom |
| 6304710 |
Integrated optical device providing attenuation |
October 16, 2001 |
| The application describes the addition of serrations to the edge of the light transmissive layer of an integrated optical device. This enables scattered background light to be coupled out of the device, improving the signal-to-noise ratio. |
| 6304690 |
Connecting a plurality of circuit boards |
October 16, 2001 |
| Apparatus connecting electrical circuit boards (1, 2, 3, . . . N) so each board can communicate with each other. Each board has an optical circuit, which in turn has a transmitter module (T) and a receiver module (R). The transmitter module (T) has electrical to optical converters (11B) |
| 6298178 |
Stray light absorption |
October 2, 2001 |
| An integrated optical circuit formed on an optically conductive substrate having light absorbing means comprising one or more doped areas (1) of the substrate where the doping concentration is greater than that of areas of the substrate forming the optical circuit (2) to absorb stray lig |
| 6298177 |
Phase modulator for semiconductor waveguide |
October 2, 2001 |
| An optical phase modulator comprises a semiconductor rib wave guide having P and N doped regions forming a PN junction along the path of the rib with terminals for applying a reverse bias to the junction to extend a carrier depletion zone to alter the refractive index, the PN junction is |
| 6278822 |
Branched optical waveguide and its method of use |
August 21, 2001 |
| The device comprises an upper silicon layer (10) including two optically connected rib waveguides (3,4) formed in the upper silicon layer (10); a pair of dissimilar materials (6,7) each positioned between the two waveguides (3,4); and an electrical circuit (8,9,13) through the pair of |
| 6212323 |
Temperature stable integrated optical device |
April 3, 2001 |
| The present invention is a temperature stable integrated optical device which is substantially insensitive to temperature variations. The device, such as an interferometer, includes sub-sections of a different light transmissive material within the optical pathways. The relative lengths |
| 6212320 |
Coupling optical fibre to waveguide |
April 3, 2001 |
| An apparatus is provided for coupling an optical fibre to a waveguide on an optical chip, the apparatus comprises a recess in the chip for receiving the optical fiber, the recess comprising a V-groove the side faces of which locate the position of the fiber in directions perpendicular to |
| 6163632 |
Integrated optical circuit |
December 19, 2000 |
| An integrated optical circuit for use in a fibre optic gyroscope which senses rotation rates by determining a phase shift due to the Sagnac Effect between light beams travelling around an optical fibre sensing loop (4) in opposite directions, the circuit being provided on a silicon-o |
| 6101210 |
External cavity laser |
August 8, 2000 |
| External Cavity Laser An external cavity laser comprising first and second feedback means with an optical gain medium (2) therebetween, one of the feedback means is provided by a grating (4) formed in a silicon waveguide and the other feedback means is provided by a reflective back facet |
| 6088496 |
Optical device for splitting up a multi-wavelength light beam |
July 11, 2000 |
| An optical device for splitting up a multi-wavelength light beam into a plurality of individual beams, each comprising light of a different wavelength or a narrow beam of wavelengths. The optical device includes an optical grating and an optical system for directing the incident beam ont |
| 6078711 |
Attachment of an optical fibre |
June 20, 2000 |
| Attachment of an optical fibre (22) to a planar substrate (17) having a major face and an edge surface (14) perpendicular to the major face, the optical fibre (22) being positioned in a groove (18) provided in the major face of the substrate (17) and extending over the edge of the substr |
