Integrated heterodyne terahertz transceiver

Radiant energy – Invisible radiant energy responsive electric signalling – Semiconductor system

Reexamination Certificate

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Reexamination Certificate

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07550734

ABSTRACT:
A heterodyne terahertz transceiver comprises a quantum cascade laser that is integrated on-chip with a Schottky diode mixer. An antenna connected to the Schottky diode receives a terahertz signal. The quantum cascade laser couples terahertz local oscillator power to the Schottky diode to mix with the received terahertz signal to provide an intermediate frequency output signal. The fully integrated transceiver optimizes power efficiency, sensitivity, compactness, and reliability. The transceiver can be used in compact, fieldable systems covering a wide variety of deployable applications not possible with existing technology.

REFERENCES:
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patent: 2002/0036814 (2002-03-01), Mueller et al.
patent: 2006/0167641 (2006-07-01), Chamberlin et al.
H.-W. Hubers et al, “Terahertz quantum cascade laser as local oscillator in a heterodyne receiver”, Optics Express, vol. 13, No. 15, Jul. 25, 2005, pp. 5890-5896.
Qing Hu et al, “Resonant-phonon-assisted THz quantum-cascade lasers with metal-metal waveguides”, Semiconductor Science and Technology, 2005, vol. 20, pp. S228-S236.
J.R. Gao et al, “Terahertz heterodyne receiver based on a quantum cascade laser and a superconducting bolometer,” Applied Physics Letters, 2005, vol. 86 pp. 244104-1 through 244104-3.
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R. Sachs et al, “Mode calculations for a terahertz quantum cascade laser,” Optics Express, vol. 12, No. 10, May 17, 2004, pp. 2062-2069.
Olivier Demichel et al, “Surface Plasmon photonic structures in terahertz quantum cascade lasers,” Optics Express, vol. 14, No. 12, Jun. 12, 2006, pp. 5335-5345.
Rudeger Kohler et al, “Terahertz semiconductor-heterostructure laser,” Nature, vol. 417, May 9, 2002, pp. 156-159.

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