Mixing and modulating methods and structures using nonlinear opt

Details Mixing and modulating methods and structures using nonlinear opt Mixing and modulating methods and structures using nonlinear opt

1997-02-21

1999-01-12

Hellner, Mark

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a steerable array

359245, 359278, H01Q 322, G02F 103

Patent

active

058596119

ABSTRACT:
Mixing and modulating methods are described for nonlinear optical amplifiers (30) which can generate intermodulation products of radio-frequency signals in an optical carrier signal (26) without the penalty of an optical conversion loss and without the need for radio-frequency mixers, electro-optic modulators and expensive polarization-maintaining optical fibers. The radio-frequency signals can be applied to either a bias port (36) or an optical input port (32) of the optical amplifier and are used to upconvert and downconvert signals in phased-array antenna and remote antenna embodiments of the invention.

REFERENCES:
patent: 3090928 (1963-05-01), Welty
patent: 5166821 (1992-11-01), Huber
patent: 5323406 (1994-06-01), Yee et al.
patent: 5617239 (1997-04-01), Walker
patent: 5687261 (1997-11-01), Logan
patent: 5710651 (1998-06-01), Logan, Jr.
Logan, Ronald T., et al., "Millimeter-Wave Photonic Downconverters: Theory and Demonstration", Proceedings of SPIE Conference on Optical Technology for Microwave Applications VII, Jul. 9-14, 1995.
Newirk, M.A., et al., "1.5 um Multiquantum-Well Semiconductor Optical Amplifier with Tensile and Compressively Strained Wells for Polarization-Independent Gain", IEEE Photonics Letters, vol. 4, No. 4, Apr. 1993.

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