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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 |
| 7031354 | Stable high efficiency multiple wavelength laser sources In a stabilized laser system, an output of a desired wavelength is generated. Each of a plurality of n lasers, which, while emitting light and having a preselected portion thereof fed back thereto, causes the fed back portion to be amplified and shifted in wavelengt... | 04/18/2006 |
| 7031355 | High efficiency single and multiple wavelength stabilized systems In a stabilized laser system, a an output signal is to be generated having a desired central wavelength. At least one laser, which, while emitting light and having a preselected portion thereof fed back thereto, causes the output signal of the laser to be shifted in... | 04/18/2006 |
| 6975797 | Single and multiple wavelength reflection and transmission filter arrangements A basic reflector arrangement has first and second power splitters. Each power splitter has first to fourth ports where the first port of the first power splitter is coupled to a remote signal source for receiving signals therefrom and providing feedback signals the... | 12/13/2005 |
| 6937795 | Combination wavelength multiplexer and wavelength stabilizer In an optical device, each of a plurality of radiation sources generates a separate different wavelength output signal to a wavelength locking device wherein a grating device receives the separate wavelength output signals from the plurality of radiation sources. Th... | 08/30/2005 |
| 6931034 | Feedback mechanisms for stabilizing a laser system An optical system has a transmission filter device, a feedback mechanism, and one or more radiation sources. Each radiation source generates an output signal with a predetermined wavelength band and polarization and is coupled to a separate input port of the transmi... | 08/16/2005 |
| 6892008 | Planar star couplers with reduced insertion loss In a star coupler, a Free Propagation Region (FPR) is bounded by a first interface and a second opposing interface, and guides an input signal launched from the first interface in a predetermined first plane while allowing the input signal to travel unguided in a pr... | 05/10/2005 |
| 6764228 | Outgas prevention in electrooptical packages A hermetic package having connectors, such as optical fibers or electrical leads, connected and bonded thereto with a bonding material such as epoxy resin, has the bonding material coated with a single layer or multiple layers of sealing material, such as chromium, ... | 07/20/2004 |
| 6690875 | Optical fiber array and method of aligning optical fibers in the array Alignment of an array of N elements, such as optical fibers, within a preselected tolerance value is obtained using a primary substrate with a plurality of N apertures extending therethrough from a first surface to a second opposing surface. Each aperture... | 02/10/2004 |
| 4924464 | Technique for converting either way between a plurality of N synchronized serial bit streams and a parallel TDM format The present invention relates techniques for bidirectionally converting between a first format comprising N concurrent serial bit streams and a second format comprising a parallel TDM bit stream of N words using an array of storage elements, each bit stre... | 05/08/1990 |
| 4914648 | Multichannel, multihop lightwave communication system The present invention relates to a multichannel multihop lightwave communication network which allows packet concurrency in the network while avoiding the need for agile optical devices. The network comprises a lightwave communication medium (10) for supp... | 04/03/1990 |
| 4912722 | Self-synchronous spread spectrum transmitter/receiver The present invention relates to a self-synchronous spread spectrum transmitter and an associated remote spread spectrum receiver which communicate with each other by the transmission of both (1) a spread spectrum Pseudo Noise Code (PNC) sequence signal, ... | 03/27/1990 |
| 4901368 | Frequency translation correction scheme for satellite communication system In a time division multiple access satellite communications system having a master station and one or more remote stations, frequency offset through the translation oscillator in the satellite is corrected by transmitting a pilot frequency signal, referen... | 02/13/1990 |
| 4901040 | Reduced-height waveguide-to-microstrip transition The present invention relates to a transition wherein a microstrip line, formed on one major surface of a substrate, is capacitively coupled to a reduced-height waveguide, comprising a predetermined width-to-height ratio, by means of a T-bar conductive pa... | 02/13/1990 |
| 4893300 | Technique for reducing distortion characteristics in fiber-optic links The present invention relates to a technique for suppressing intermodulation products introduced by nonlinearities of a laser in a multicarrier Freqeuncy Division Multiplexed (FDM) fiberoptic link. More particularly, for two or more closely spaced FDM cha... | 01/09/1990 |
| 4872163 | Contention mechanism for communication networks A contention mechanism is disclosed for a communication network that provides perfect scheduling to avoid collisions between packets from a cluster of M circuit boards connected to a communications bus. The contention mechanism includes a 2-phase contenti... | 10/03/1989 |
| 4870637 | Optical backplane The present invention relates to an optical backplane for use in a switching system or computer for interconnecting a plurality of associated circuit modules. The backplane comprises a switch which is interconnected to each of the associated circuit modul... | 09/26/1989 |
| 4868889 | Microwave absorber attenuator for linear SSPA power control The nonlinearity of the frequency response of a solid state power amplifier (SSPA) is obviated by effectively operating the SSPA at the 1 dB compression point, where the nonlinearity does not exist, and controllably reducing, downstream of the SSPA, the p... | 09/19/1989 |
| 4866758 | Phone management server for use with a personal computer LAN The present invention relates to a technique for providing phone management (PM) services to personal computers (PCs) which are end users of a PC-only Local Area Network (LAN) by logically associating voice terminals of a separate voice and data Network, ... | 09/12/1989 |
| 4864561 | Technique for improved subjective performance in a communication system using attenuated noise-fill The present invention relates to a method for providing noise fill in a communication system. The method comprises the detecting (16) of active and inactive information signal transmission periods to a destined end user, and the measuring (17) of backgrou... | 09/05/1989 |
| 4842368 | N×N single-mode optical waveguide coupler The present invention relates to a N×N single-mode optical coupler employing evanescent wave coupling between mutually adjacent optical waveguides sufficiently close to one another to facilitate coupling among all the waveguides. An optical signal of a n... | 06/27/1989 |
| 4820321 | Method and apparatus for fabricating an expanded beam cylindrically terminated optical fiber taper An apparatus and method are disclosed for fabricating an expanded beam cylindrical terminated optical fiber taper from a reduced diameter preform rod. The present invention comprises uniformly heating the circumference of a predetermined portion at an int... | 04/11/1989 |
| 4807222 | Cordless accessed high-speed high-capacity local area networks The present invention relates to a high-speed high-capacity Local Area Network (LAN) wherein each user, of a separate group of one or more of the network users, communicates cordlessly, using radio frequencies or infrared, with an assigned Regional Bus In... | 02/21/1989 |
| 4800555 | Technique for repelling carriers in optical communications to minimize mutual interference The present invention relates to a technique for repelling carriers in a Frequency Division Multiplexed (FDM) lightwave communication system to minimize mutual interference between signals. The system comprises a plurality of transceivers (20), each compr... | 01/24/1989 |
| 4797879 | Packet switched interconnection protocols for a star configured optical lan The present invention relates to packet switched interconnection protocols for use in high-speed optical Star-configured Local Area Networks (LANs). In the present Star LAN, a plurality of N+1 wavelength division multiplexed (WDM) channels are provided fo... | 01/10/1989 |
| 4794351 | Optical mixer for upconverting or downconverting an optical signal The present invention relates to an optical upconverting or downconverting gain or loss modulating mixer and a receiver for subcarrier optical communication systems using this mixer. The optical mixer can be formed, for example, from an optical amplifier ... | 12/27/1988 |
| 4789983 | Wireless network for wideband indoor communications The present invention relates to a wideband communication network using wireless radio transmissions either on a stand-alone basis or to supplement a hard-wired network. The exemplary network comprises (a) a plurality of transceivers associated with separ... | 12/06/1988 |
| 4789980 | Switching techniques for FDM communication systems The present invention relates to a switching technique for packet Frequency Division Multiplexed (FDM) communication systems. In the present system, each of N system users is assigned (a) either a separate fixed one of N transmit frequency channels or a s... | 12/06/1988 |
| 4786910 | Single reflector multibeam antenna arrangement with a wide field of view The present invention relates to an antenna comprising a plurality of feeds, and either a single reflector or a single lens wherein the reflector or lens includes a predetermined curved major surface that produces a maximum field of view in a first one of... | 11/22/1988 |
| 4760570 | N-by-N "knockout" switch for a high-performance packet switching system The present invention relates to an N-input, N-output "Knockout" packet switch (11) which uses decentralized control and distributed routing. More particularly, within the switch, the N input signals comprising fixed-length packets propagate along separat... | 07/26/1988 |
| 4755794 | Digital-to-digital code converter The present invention relates to a digital-to-digital code converter, or decimator, which implements sinc3 processing. The input signal (X) to the code converter comprises a series of groups, each group including a series of N digital sample va... | 07/05/1988 |
| 4754451 | N-by-N "knockout" switch for a high-performance packet switching system with variable length packets The present invention relates to an N-input, N-output "Knockout" packet switch (11) which uses decentralized control and distributed routing for routing high-speed, time-multiplexed, variable-length packets of information from the N inputs to the N output... | 06/28/1988 |
| 4754452 | Optical local area network using a common optical carrier with separate user angle modulation The present invention relates to a multiple-user communication system wherein one carrier source is shared by a cascade of users of the system. More particularly, the present communication system uses a single carrier propagating along the system's transm... | 06/28/1988 |
| 4737004 | Expanded end optical fiber and associated coupling arrangements An optical fiber is disclosed which comprises (a) a central core section of constant thickness which terminates in an outwardly gradually expanded end section, and (b) a cladding layer enveloping the core. Both the core and the cladding layer are of const... | 04/12/1988 |
| 4730888 | Optimized guided wave communication system The present invention relates to an optimized guided wave microwave or lightwave communication system or network wherein a plurality of directional couplers (14, 17) (a) are disposed along a bus-like wave guiding means (13, 16), and (b) include separate c... | 03/15/1988 |
| 4730305 | Fast assignment technique for use in a switching arrangement The present invention relates to a fast packet assignment technique, and a TDMA or FDMA multi-port switching arrangement for implementing such technique. In the present technique, the total traffic in a two-dimensional traffic matrix (T) from and to each ... | 03/08/1988 |
| 4726040 | Burst demodulator The present invention relates to a burst demodulator for use, for example, in a TDMA communication system, which comprises a first section that downconverts a received r-f burst sequence signal to an approximate baseband signal with a local oscillator, sa... | 02/16/1988 |
| 4723316 | Polarization independent coherent optical heterodyne receivers The present invention relates to coherent optical heterodyning receivers which mix a received optical signal, including an arbitrary polarization state, and a local oscillator signal, including a fixed polarization state, while providing a performance whi... | 02/02/1988 |
| 4723321 | Techniques for cross-polarization cancellation in a space diversity radio system The present invention relates to a technique for achieving cross-polarization interference (CPI) cancellation with or without equalization in a digital-radio, space-diversity communication system. More particularly, a present receiver includes a pair of s... | 02/02/1988 |
| 4723317 | Optical heterodyne mixers providing image-frequency rejection The present invention relates to an optical heterodyne mixer providing image-frequency rejection which (a) detects a desired signal at frequency fL.O. &#b1;fIF while rejecting interference from any signal at the image frequency f | 02/02/1988 |
| 4706208 | Technique for the operational life test of microprocessors The present invention relates to an Operational Life Test (OLT) or "burn-in" technique for testing microprocessors. In accordance with the present invention, an OLT chamber is provided wherein many Evaluation Boards are mounted within racks in a frame in ... | 11/10/1987 |
