Ball Aerospace & Technologies Corp.

Pts Corporation

Robert W Kaliski

Robert G Marshalek

Isabella Talley Lewis

Robert T Weverka

Bevan D Staple

S Christopher Alaimo

Edward J Bortolini

Robert M Pierce

Miroslaw A Ostaszewski

Christopher Stephen Wood

Jim Rice

Marc DeFrancesco

Steven Mechels

Holden Chase

Andrew J M Kiruluta

Brian Primeau

John R Troeltzsch

David Marinelli

Colin H Wilson

Keith Honea

A hetero-junction phototransistor with a first layer comprising an InP N buffer and substrate, a second layer comprising an InGaAs N collector on the InP N buffer and substrate, a plurality of InGaAs P bases on the InGaAs N collector layer, and a plurality of InAIAs N emitters is described. Each emitter of the plurality of InAIAs N emitters is on a different base of the plurality of InGaAs P bases. The hetero-junction phototransistor comprises a plurality of InGaAs N+ caps, wherein each cap of the plurality of InGaAs N+ caps is on a different emitter of the plurality of InAIAs N emitters. The hetero-junction phototransistor comprises one or more electrical contacts. Each of the one or more electrical contacts is on a different cap of the plurality of InGaAs N+ caps.

Hetero-junction phototransistor

A micropositioner is provided. The micropositioner can include a suspension system with a support element that is connected to a base by first and second sets of flexures. The first and second sets of flexures permit movement of the support element within first and second dimensions respectively, while preventing movement of the support element in a third dimension that is orthogonal to the first and second dimensions. More particularly, the first set of flexures can include first and second flexures that are opposite one another and configured such that movement of the support element in the first dimension is allowed, but movement of the support element in the second and third dimensions is prevented. The second set of flexures can include third and fourth flexures that are opposite to one another and configured such that movement of the support element in the second dimension is allowed, but movement in the first and third dimensions is prevented. The micropositioner may be included in a system for pointing a laser beam.

Fiber micropositioner

Free-space communication systems and methods are provided. The systems include a transmitter that combines multiple sets of radio-frequency-modulated optical carrier frequencies for transmission across free space using multiple transmission apertures. Different sets of signals are filtered to form single sideband signals. The different sets of single sideband signals are then combined to form dense wavelength division multiplexed signals. In addition, combined sets of signals of different polarizations can be combined. A receiver can include a single receive aperture.

Systems and methods for multiplexing and demodulation at high frequencies and increased communication bandwidth

The present invention relates to a numerous user laser communications optical system. Numerous optical signals comprising a number of channels are simultaneously received and demultiplexed (and/or multiplexed and transmitted) at a numerous access communication device. The numerous access communication device may comprise multiple stages that each include a multiple order waveplate and a polarizing beam splitter. The multiple order waveplate is configured so that it retards a first electrical field component of signals corresponding to certain channels in a frequency grid in an integer multiple of wavelengths with respect to a second electrical field component, and retards a first electrical field component of signals corresponding to other channels in the frequency grid in an integer multiple of wavelengths plus one-half a wavelength with respect to a second electrical field component. Separation can then be performed on the basis of the resulting opposite polarization.

Numerous user laser communications optical system using chromatic waveplates and a common telescope aperture

A tunable demultiplexer accepts an input optical signal that has multiple spectral bands and provides multiple output signals. Each of the output signals corresponds to a selected one of the spectral bands. The tunable demultiplexer has at least one wavelength routing element and at least one optical arrangement disposed to exchange light with the wavelength routing element. The wavelength routing element is of the type adapted for selectively routing wavelength components of a first optical signal onto multiple second optical signals according to a configurable state.

Tunable DWDM demultiplexer

Growing community of inventors

Boulder, CO, United States of America

Robert W Kaliski