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| Number | Title | Issue Date |
| 4819373 | Method of thinning fruitlets or fruits of crops A process for thinning fruitlets or fruits by exposing the crops to far-red night-break lighting treatments at certain stages of flower and fruit growth and development.... | 04/11/1989 |
| 4788793 | Method of inhibiting premature budding of short-day floral crops A method of inhibiting premature budding and subsequent flowering of a floral crop selected from the group of chrysanthemum and poinsettia during the season in which the daily photoperiod does not exceed ten hours comprises the step of illuminating the cr... | 12/06/1988 |
| 4772118 | Methods of and apparatus for measuring picosecond semiconductor laser pulse duration using the internally generated second harmonic emission accompanying the laser output The duration of a very short semiconductor laser pulse, such as that ranging from a fraction to hundreds to picoseconds, can be measured utilizing the internally generated second harmonic emission of the laser. A laser diode is driven so that light emitte... | 09/20/1988 |
| 4772104 | Achromatic tuner for birefringent optical filter An achromatic birefringent retardation plate has a quarter wave of linear optical birefringence over a wavelength range centered about a nominal wavelength. The plate includes a combination of two birefringent optical disks in adjacent positions along a l... | 09/20/1988 |
| 4765705 | Grating surface plasmon coupler Devices for efficiently coupling electromagnetic radiation in the far infrared and sub-millimeter microwave regions of the electromagnetic spectrum to surface electromagnetic waves comprise a material of negative dielectric constant having a grating conto... | 08/23/1988 |
| 4749277 | Methods of and apparatus for measuring the frequency response of optical detectors Methods of and apparatus for measuring the frequency response of optical detectors based on interferometrically demodulating a frequency modulated semiconductor laser. Detectors can be characterized where the 3 dB roll-off frequency is in excess of 100 GH... | 06/07/1988 |
| 4744625 | Methods of and apparatus for providing frequency modulated light Frequency modulated light is provided to an optical fiber by exciting a laser medium, such as a diode laser, so that stimulated emitted radiation, at a fixed wavelength λ, emanates from opposite surfaces of the medium. One end of the fiber is coupled to ... | 05/17/1988 |
| 4745591 | Multiple channel wavelength division multiplexer/demultiplexer A sequential configuration of log2 n stages of birefringent elements are set forth. Each stage has a transfer function approximating a square wave, and successive stages have half periods. An input beam with n wavelength components would be dem... | 05/17/1988 |
| 4744075 | Multichannel wavelength multiplexer/demultiplexer An n channel birefringent multiplexer/demultiplexer consists of log2 n sequences of birefringent crystal elements in Solc-type filter configuration. The configuration of polarizing beam splitters have one such beam splitter before the first seq... | 05/10/1988 |
| 4734934 | Binaural teleconferencing system A teleconferencing bridge simulates the auditory spatial ambience of a face-to-face conference. This bridge uses a novel binaural approach to simulate spatial ambience.... | 03/29/1988 |
| 4726030 | External-coupled-cavity diode laser A monolithic external-coupled-diode laser structure uses high reflectivity facet coatings to reduce the operating current and to improve suppression of unwanted longitudinal modes.... | 02/16/1988 |
| 4724633 | Method of accelerating dehiscence and of reducing pull force of fruits A process for accelerating dehiscence and reduction in "pull force" of fruits and nuts (in order to facilitate the mechanical harvesting process) by exposing the crops to far-red night-break lighting treatments at certain stages of fruit growth and develo... | 02/16/1988 |
| 4714346 | Frequency chirped interferometric displacement sensors and mechanical translation tips therefor Mechanical translation tips can be attached to a fiber version of a frequency chirped interferometric displacement sensor. The mechanical tips can be used in noisy or deleterious environments that preclude the use of non-contact optical sensors. These tip... | 12/22/1987 |
| 4713587 | Multipulse starting aid for high-intensity discharge lamps A multipulse starting aid for a high-intensity discharge lamp includes a spiral line, a bi-directional solid-state switch, or a spark gap, coupled to one of the ends of the spiral line, a resistance in association with the spiral line to provide an RC tim... | 12/15/1987 |
| 4712046 | Quadrature-coupled microwave electrodeless lamp A re-entrant, low-pressure, electrodeless lamp apparatus includes two identical re-entrant center conductors driven in quadrature, resulting in a matched lamp input impedance in both the off and on states nearly independent of incident microwave power.... | 12/08/1987 |
| 4703281 | Clocking pulse generator A clocking pulse generator includes means for receiving voltage from a multi-phase alternating current electrical power source. A vector summing circuit provides a non-zero resultant vector for various combinations of multi-phase operating conditions. A m... | 10/27/1987 |
| 4689793 | Optical logic and memory apparatus A complete set of optical logic gates and circuits based upon direct polarization switching, and various types of optical flip-flops based upon polarization bistability, in semiconductor lasers are described. By operating the laser in the direct polarizat... | 08/25/1987 |
| 4689797 | High power single spatial mode semiconductor laser A high power single spatial mode semiconductor laser provides strong lateral index guiding to maintain single transverse mode output and yet has a large cavity area. The large cavity area provides low series resistance, low thermal resistance, and lower o... | 08/25/1987 |
| 4687286 | Methods of and apparatus for optical spatial scanning A chirped grating focuses guided waves to variable space points as determined by the intensity of a control beam. This can be achieved with a light controlled spatial scanner which includes a corrugated waveguide fabricated of a material having a non-line... | 08/18/1987 |
| 4685773 | Birefringent optical multiplexer with flattened bandpass A birefringent optical wavelength multiplexer/demultiplexer includes a first polarization beam-splitter, a first reflector, a plurality of birefringent elements, a second reflector, and a second polarization beam-splitter. The plurality of birefringent el... | 08/11/1987 |
| 4686497 | Adjustable waveguide short circuit An adjustable waveguide short circuit using a thin partition or rectangular pin parallel to the E-field in the waveguide and movable along longitudinal slots centrally located on the two broad walls of the waveguide.... | 08/11/1987 |
| 4685108 | Optical multivibrator An optical square wave multivibrator includes a semiconductor laser that operates near the polarization transition temperature in a pure TM mode at low injection currents and switches operation to a pure TE mode at high injection currents, and vice versa.... | 08/04/1987 |
| 4679199 | High power InGaAsP/InP semiconductor laser with low-doped active layer and very low series resistance In conventional InGaAsP/InP semiconductor lasers the p-doping in the InP laser level cannot be increased above 1×1018 atoms/cm3 without adversely affecting the optical characteristics of the devices. However, by introducing a thin l... | 07/07/1987 |
| 4678287 | Methods of and apparatus for tuning a birefringent optical filter The simultaneous and equal tuning of two birefringent crystal elements of a Solc type optical filter by pairs of quarter-wave plates adjacent to each and oriented such that equal and opposite physical rotations between the plates of each pair tunes its ad... | 07/07/1987 |
| 4671613 | Optical beam splitter prism An improved geometry for an optical beam splitter prism permits all input and output beams to be parallel and to remain parallel while the prism is misaligned. It is particularly useful in conjunction with fiber optic couplers and is applicable to splitti... | 06/09/1987 |
| 4669418 | Optical coating apparatus Apparatus for evaporating numerous layers of various substances upon a substrate includes square witness chips transparent to a specific beam of radiation. A witness chip holder, having a cylindrical base, has an axial hole vertically disposed from its ce... | 06/02/1987 |
| 4668045 | Optical fiber centering device A centering device holds an optical fiber along an axis with three fiber receiving sections and a receiving member. The receiving member has a concentric cylindrical cavity for holding assembled sections. Each section, substantially identical, has a unifo... | 05/26/1987 |
| 4650276 | Optical fiber connected broadband microwave package for optoelectronic components Apparatus couples optical fiber to an optoelectronic component with a collet, a cylindrical member, a connector, and hermetically sealing means. The collet has a central orifice through a knurled end portion, a central portion with a male thread, and a se... | 03/17/1987 |
| 4647800 | High speed logic apparatus A high speed laser driver includes a differential pair of bipolar transistors sharing a common emitter resistor as in the prior art. However, an improvement thereover resides in the use of Schottky barrier diodes, one of which couples the emitter of one t... | 03/03/1987 |
| 4647792 | High speed laser driver A high speed laser driver includes a differential pair of bipolar transistors sharing a common emitter resistor as in the prior art. However, an improvement thereover resides in the use of Schottky barrier diodes, one of which couples the emitter of one t... | 03/03/1987 |
| 4636239 | Method of fluidic support of a heat softened glass tube A fluidic support device is described that counteracts the gravitational bending moment present in a substrate tube during a modified chemical vapor deposition preform fabrication process. Hence, use of this device results in the production of a straight ... | 01/13/1987 |
| 4634239 | Multiple port optical fiber switch A multiple port electromechanical optical fiber switch provides for the exchange redirection of one common optical path with one of several other optical paths through the switch. It is particularly useful when one standby laser transmitter must be quickl... | 01/06/1987 |
| 4632574 | Apparatus for fluidic support A fluidic support device is described that counteracts the gravitational bending moment present in a substrate tube during a modified chemical vapor deposition preform fabrication process. Hence, use of this device results in the production of a straight ... | 12/30/1986 |
| 4616899 | Methods of and apparatus for coupling an optoelectronic component to an optical fiber An optical fiber can be coupled to a semiconductor light source or detector using molded lens elements. The apparatus is easy to assemble, it is inexpensive, and it achieves true hermetic sealing of the semiconductor for a good reliability.... | 10/14/1986 |
| 4600932 | Enhanced mobility buried channel transistor structure An enhanced mobility buried channel transistor structure in which the quasi-two-dimensional electron gas (2DEG) which forms the conducting channel in the structure is removed from the proximity of the heterointerface, and is placed in a region remote ther... | 07/15/1986 |
| 4600847 | Predistortion equalizing circuit A predistortion circuit that cancels second order distortion of light emitting diodes enabling interference free transmission of multiple vestigial sideband television channels through a single optical fiber. This is achieved by preamplifying a signal wit... | 07/15/1986 |
| 4597640 | Optical polarization restoration apparatus An active system for restoring the polarization state of light emerging from a single-mode optical fiber. The system changes the slowly varying elliptical polarization resulting from environmental effects on the long fiber to a linear polarization state o... | 07/01/1986 |
| 4593397 | Electrodeless short pulse laser A laser device with a discharge tube forming a closed envelope with cylindrical end portions connected by an elongated constricted center portion and having external electrodes at the end portions, fed from a source of short pulses with a width measured i... | 06/03/1986 |
| 4589726 | Optical fiber rotary switch An electro-mechanical optical fiber rotary switch provides for latched reconnection of two optical paths among four optical fiber ports of a 2×2 switching array. A right isosceles triangular optical prism is used in the switch, the prism being rotated 90... | 05/20/1986 |
| 4583818 | Optical device with surface plasmons An optical device used as an optical switch or bistable device, with surface plasmons, is comprised of a semiconductor base material forming a non-linear dielectric layer along with a metal layer, with an interface between the metal and semiconductor laye... | 04/22/1986 |
