Abstract: A time domain filter receives a double sideband (DSB) input in the frequency domain and compresses this input into a time domain signal filtered by a time gate for providing a time filtered signal that is then expanded back into the frequency domain as a single sideband (SSB) output with one sideband being filtered by the time gate for translating DSB signals into SSB signals well suited for communicating chirped modulated signals as SSB signals along an electrical line or optical fiber without dispersive nulling of the communicated signal.

Abstract: A time domain filter receives a double sideband (DSB) input in the frequency domain and compresses this input into a time domain signal filtered by a time gate for providing a time filtered signal that is then expanded back into the frequency domain as a single sideband (SSB) output with one sideband being filtered by the time gate for translating DSB signals into SSB signals well suited for communicating chirped modulated signals as SSB signals along an electrical line or optical fiber without dispersive nulling of the communicated signal.

Abstract: A device having a light cavity includes, at one end, a plasmonic reflector having a grating surface for coupling incoming light into traverse plasmon waves and for coupling the traverse plasmon wave into broaden light, the surface serving to redistribute light within the cavity, the reflector being well suited for use in laser diodes for redistributing filamental cavity laser light into spatially broaden cavity laser light for translating multimodal laser light into unimodal laser light for improved reliability and uniform laser beam creation.

Abstract: A device having a light cavity includes, at one end, a plasmonic reflector having a grating surface for coupling incoming light into traverse plasmon waves and for coupling the traverse plasmon wave into broaden light, the surface serving to redistribute light within the cavity, the reflector being well suited for use in laser diodes for redistributing filamental cavity laser light into spatially broaden cavity laser light for translating multimodal laser light into unimodal laser light for improved reliability and uniform laser beam creation.

Abstract: A device having a light cavity includes, at one end, a plasmonic reflector having a grating surface for coupling incoming light into traverse plasmon waves and for coupling the traverse plasmon wave into broaden light, the surface serving to redistribute light within the cavity, the reflector being well suited for use in laser diodes for redistributing filamental cavity laser light into spatially broaden cavity laser light for translating multimodal laser light into unimodal laser light for improved reliability and uniform laser beam creation.

Abstract: A surface plasmon polaritron activated semiconductor device uses a surface plasmon wire that functions as an optical waveguide for fast communication of a signal and functions as a energy translator using a wire tip for translating the optical signal passing through the waveguide into plasmon-polaritron energy at a connection of the semiconductor device, such as a transistor, to activate the transistor for improved speed of communications and switching for preferred use in digital systems.

Abstract: A device having a light cavity includes, at one end, a plasmonic reflector having a grating surface for coupling incoming light into traverse plasmon waves and for coupling the traverse plasmon wave into broaden light, the surface serving to redistribute light within the cavity, the reflector being well suited for use in laser diodes for redistributing filamental cavity laser light into spatially broaden cavity laser light for translating multimodal laser light into unimodal laser light for improved reliability and uniform laser beam creation.

Abstract: A time domain filter receives a double sideband (DSB) input in the frequency domain and compresses this input into a time domain signal filtered by a time gate for providing a time filtered signal that is then expanded back into the frequency domain as a single sideband (SSB) output with one sideband being filtered by the time gate for translating DSB signals into SSB signals well suited for communicating chirped modulated signals as SSB signals along an electrical line or optical fiber without dispersive nulling of the communicated signal.

Abstract: A surface plasmon polaritron activated semiconductor device uses a surface plasmon wire that functions as an optical waveguide for fast communication of a signal and functions as a energy translator using a wire tip for translating the optical signal passing through the waveguide into plasmon-polaritron energy at a connection of the semiconductor device, such as a transistor, to activate the transistor for improved speed of communications and switching for preferred use in digital systems.

Abstract: A differential quadrature phase shift keyed system includes a fiber optic source and a first fiber optic differential phase shift keyed demodulator coupled to the fiber optic source having a first phase differential. A second fiber optic differential phase shift keyed demodulator is coupled to the fiber optic source disposed parallel with the first fiber optic differential phase shift key demodulator. The second demodulator has a second phase shift differential equal to the first phase differential plus about 90 degrees.

Abstract: A high extinction ratio interferometer is disclosed. The interferometer includes a first and second optical fiber each having a first end and a reflective end and an optical coupler for coupling the first optical fiber and the second optical fiber between their first ends and their reflective ends. The first optical fiber provides a first optical path from the optical coupler to its reflective end and back to the optical coupler and the second optical fiber provides a second optical path from the optical coupler to its reflective end and back to the optical coupler. The second path is greater than the first path by a delay length and the first path and the second path are each less than approximately 20 cm. The interferometer finds application as a differential phase shift keyed (DPSK) demodulator, particularly useful in a satellite system employing inter-satellite communication.

Abstract: A system and method for performing phase-encoded optical Code Division Multiple Access (CDMA). A transmitter encodes digital data onto a wavelength of an optical signal using a codeword, splits the optical signal into a plurality of beams having separated frequency components, selectively phase-shifts the beams in accordance with the codeword, recombines the beams into the optical signal, and transmits the optical signal. The receiver receives the optical signal, splits the optical signal into a plurality of beams having separated frequency components, selectively phase-shifts the beams in accordance with the codeword, recombining the beams into the optical signal, and decodes the digital data from a wavelength of the optical signal using the codeword.

Abstract: A system for controlling a relative length a first optical fiber and a second optical fiber includes a first heater coupled to the first optical fiber, a second heater coupled to the second optical fiber, and a controller coupled to the first heater and the second heater. The controller operates the first heater in response to a temperature less than a predetermined temperature and operates the second heater in response to the temperature greater than the predetermined temperature. This allows the length of the optical fibers to be maintained evenly.

Abstract: A high extinction ratio interferometer is disclosed. The interferometer includes a first and second optical fiber each having a first end and a reflective end and an optical coupler for coupling the first optical fiber and the second optical fiber between their first ends and their reflective ends. The first optical fiber provides a first optical path from the optical coupler to its reflective end and back to the optical coupler and the second optical fiber provides a second optical path from the optical coupler to its reflective end and back to the optical coupler. The second path is greater than the first path by a delay length and the first path and the second path are each less than approximately 20 cm. The interferometer finds application as a differential phase shift keyed (DPSK) demodulator, particularly useful in a satellite system employing inter-satellite communication.

Abstract: A system for controlling a relative length a first optical fiber and a second optical fiber includes a first heater coupled to the first optical fiber, a second heater coupled to the second optical fiber, and a controller coupled to the first heater and the second heater. The controller operates the first heater in response to a temperature less than a predetermined temperature and operates the second heater in response to the temperature greater than the predetermined temperature. This allows the length of the optical fibers to be maintained evenly.

Abstract: A differential quadrature phase shift keyed system includes a fiber optic source and a first fiber optic differential phase shift keyed demodulator coupled to the fiber optic source having a first phase differential. A second fiber optic differential phase shift keyed demodulator is coupled to the fiber optic source disposed parallel with the first fiber optic differential phase shift key demodulator. The second demodulator has a second phase shift differential equal to the first phase differential plus about 90 degrees.