| Patent Number |
Title Of Patent |
Date Issued |
| 6862136 |
Hybrid optical transmitter with electroabsorption modulator and semiconductor optical amplifier |
March 1, 2005 |
| An optical radiation amplifier, including an input port which receives the optical radiation and a first semiconductor optical amplifier (SOA), which is coupled to receive the optical radiation from the input port and is adapted to amplify the optical radiation to produce amplified optic |
| 6826368 |
Wavelength division multiplexing (WDM) with multi-frequency lasers and optical couplers |
November 30, 2004 |
| The present invention relates to an optical switching device for WDM systems based on multi-frequency lasers and optical couplers. A router/switch mapping of IP (or other protocols) subnets or addresses to an optical channel instead of a physical interface. Another embodiment of the |
| 6275317 |
Hybrid integration of a wavelength selectable laser source and optical amplifier/modulator |
August 14, 2001 |
| A hybrid integrated optical transmitter comprising a wavelength selectable laser (WSL) source coupled to an optical amplifier/modulator has been realized. Disposed between the optical combiner and the optical amplifier/modulator is an "optical isolator." The optical isolator includes |
| 6208454 |
All-optical mach-zehnder wavelength converter with monolithically integrated laser |
March 27, 2001 |
| A wavelength converter incorporating an on-chip integrated laser for use in an optical system. The converter includes a first port for receiving an optical input signal such as a WDM signal and providing it to an interferometer, and an output port for outputting a signal which is a w |
| 6186631 |
Two-section semiconductor optical amplifier |
February 13, 2001 |
| A unitary two-section semiconductor optical amplifier including a first active region, a second active region, and a passive region integrally connected between the first and second active regions to minimize optical loss therebetween. The arrangement of the two-section semiconductor |
| 6134250 |
Wavelength-selectable fiber ring laser |
October 17, 2000 |
| A stable single-mode wavelength selectable ring laser operates at a single wavelength which is selectable from any channel passband of a multiple-channel wavelength multiplex/demultiplexer element (e.g., an arrayed waveguide grating router (AWGR)). A Fabry-Perot semiconductor optical |
| 6072612 |
WDM transmitter for optical networks using a loop-back spectrally sliced light emitting device |
June 6, 2000 |
| An apparatus and method pulses a broadband optical source such as an LED, and generates multiple optical wavelength signals channels which are time division multiplexed onto a single optical channel. The multiple optical wavelength signals may subsequently be modulated by low frequency d |
| 5991060 |
Automatic power control for a wavelength selective EML module |
November 23, 1999 |
| The invention is directed to an optical transmission system employing an electro-absorption modulator operative that absorbs energy from light received from a source of light and modulates the received light with information signals received from a source of information and outputs the |
| 5930423 |
Semiconductor optical waveguide devices with integrated beam expander coupled to flat fibers |
July 27, 1999 |
| An optical coupling system couples an optical fiber to an optical semiconductor device. A beam expander is disposed within the optical semiconductor so as to receive light from or transmit light into the optical fiber. The coupling is accomplished by disposing a layer of an index mat |
| 5889898 |
Crosstalk-reduced integrated digital optical switch |
March 30, 1999 |
| Methods and apparatus for performing optical signal switching or other optical routing functions in an optical device or system, in which crosstalk induced by modal interference is suppressed by providing appropriate loss, gain and/or refractive index changes in different parts of a |
| 5863809 |
Manufacture of planar photonic integrated circuits |
January 26, 1999 |
| The specification describes photonic integrated circuit structures, and methods for making structures in which the active and passive waveguides are coplanar, and further in which all the layers of both the active and passive device regions are essentially coplanar, resulting in a planar |
| 5861965 |
Optical communication system employing spectrally sliced optical source |
January 19, 1999 |
| An apparatus and method provides optical multiple wavelength signals using a single, broadband optical source such, for example, as an LED, to generate many independent optical wavelength channels. An optical transmitter includes a wavelength channel defining assembly which resolves |
| 5793789 |
Detector for photonic integrated transceivers |
August 11, 1998 |
| An integrated light-emitting device has a laser section and a detector section. The laser section and the detector section have an active layer that is integrated along an in-line waveguide. The detector section also has a bulk layer adjacent to the active layer, where the bulk layer has |
| 5721797 |
Apparatus and method for mounting a laser to a substrate and aligning the laser with an optical |
February 24, 1998 |
| A laser mounting configuration and method that enables a laser to be mounted onto a substrate in an orientation that passively aligns the laser with and adjacent optical fiber or optical waveguide. In an application with an optical fiber, a structure is formed in the substrate to retain |
| 5720893 |
Tapered beam expander waveguide integrated with a diode lasesr |
February 24, 1998 |
| The present invention is directed to a semiconductor waveguiding structure which includes a) a first semiconductor waveguiding layer formed on a substrate, b) a barrier layer that is formed on the first semiconductor waveguiding layer, and that is resistant to a selected etchant, and c) |
| 5631989 |
Fiber and active optical device interconnection assembly |
May 20, 1997 |
| A connector assembly for coupling an optical fiber to an active optical device has a metal sleeve and an L-shaped alignment block having perpendicularly disposed reference surfaces. A resilient member on the sleeve biases an optical fiber terminating plug against the reference surfac |
| 5574742 |
Tapered beam expander waveguide integrated with a diode laser |
November 12, 1996 |
| The present invention is directed to a semiconductor waveguiding structure which includes a) a first semiconductor waveguiding layer formed on a substrate, b) a barrier layer that is formed on the first semiconductor waveguiding layer, and that is resistant to a selected etchant, and c) |
| 5473625 |
Tunable distributed Bragg reflector laser for wavelength dithering |
December 5, 1995 |
| An apparatus and method are disclosed for suppressing stimulated Brillouin scattering (SBS) of the output light from a laser such as a distributed Bragg reflector (DBR) semiconductor laser using a tuner which responds to a dither signal to continuously tune the semiconductor laser to red |
| 5309469 |
Monitoring optical gain of semiconductor optical amplifier |
May 3, 1994 |
| In this invention, a semiconductor device designed for use as an optical amplifier is provided with three sections; an input section, a middle section and an output section. A continuous optical waveguide extends through the input section, the middle section and the output section and |
| 5288659 |
Photonic-integrated-circuit fabrication process |
February 22, 1994 |
| An improved process for fabricating photonic circuits is disclosed. The inventive process starts with a growth of a base wafer comprising a stack of epitaxial layers of various materials. At least a portion of each of the material layers will ultimately be a functioning part of any of a |
| 5253314 |
Tunable optical waveguide coupler |
October 12, 1993 |
| Various optical functions are generated in accordance with the present invention of a novel broadly tunable monolithic wavelength selective coupler which can be integrated with a gain medium to form a broadly tunable laser. The tunable wavelength selective coupler supports a pair of |
| 5147825 |
Photonic-integrated-circuit fabrication process |
September 15, 1992 |
| An improved process for fabricating photonic circuits is disclosed. The inventive process starts with a growth of a base wafer comprising a stack of epitaxial layers of various materials. At least a portion of each of the material layers will ultimately be a functioning part of any of a |
| 5144637 |
Inline diplex lightwave transceiver |
September 1, 1992 |
| Full duplex lightwave communications is achieved in a diplex transceiver realized in a semiconductor photonic integrated circuit having an inline interconnecting waveguide integral with the transmitting and receiving portions of the transceiver. Semiconductor lasers and detectors operati |
| 5134671 |
Monolithic integrated optical amplifier and photodetector |
July 28, 1992 |
| An optical amplifier and photodetector are monolithically integrated, with the photodetector being optically coupled to the optical amplifier through a low radiative loss and low back reflectivity branching waveguide. Because of the low reflectivity, the branching waveguide, although hav |
| 5127081 |
Optical branching waveguide |
June 30, 1992 |
| An optical branching waveguide having low radiative loss and low back-reflectivity is described. By employing between the branches a region having a gradual decrease in effective refractive index along the direction of optical propagation, the deleterious effect of wedge tip truncati |
| 5031188 |
Inline diplex lightwave transceiver |
July 9, 1991 |
| Full duplex lightwave communications is achieved in a diplex transceiver realized in a semiconductor photonic integrated circuit having an inline interconnecting waveguide integral with the transmitting and receiving portions of the transceiver. Semiconductor lasers and detectors operati |
| 4955028 |
Wavelength tunable composite cavity laser |
September 4, 1990 |
| Wavelength tunability and single frequency output are achieved in a coherent light source employing an adjustably controllable reflector. The light source includes a gain medium coupled to a single-mode fiber having a partially reduced cladding region at a predetermined distance from the |
| 4944838 |
Method of making tapered semiconductor waveguides |
July 31, 1990 |
| Adiabatic mode control and structural reproducibility are achieved by a tapered semiconductor waveguide structure wherein semiconductor guiding layers are interleaved with stop-etch layers and each guiding layer extends further along the propagation axis of the waveguide further than |
| 4932032 |
Tapered semiconductor waveguides |
June 5, 1990 |
| Adiabatic mode control and structural reproducibility are achieved by a tapered semiconductor waveguide structure wherein semiconductor guiding layers are interleaved with stop-etch layers and each successive guiding layer extends further along the propagation axis of the waveguide than |
| 4904045 |
Grating coupler with monolithically integrated quantum well index modulator |
February 27, 1990 |
| A grating coupler is combined with a quantum well index modulator and an optical waveguide to alter the reverse or forward coupling characteristics between two different propagation modes of the system. |
