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Opto-electronic device for frequency standard generation and terahertz- range optical demodulation based on quantum interference
Opto-electronic device for frequency standard generation and terahertz- range optical demodulation based on quantum interference
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机译:基于量子干涉的频率标准生成和太赫兹范围光学解调的光电装置
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摘要
An opto-electronic system and technique for comparing laser frequencies with large frequency separations, establishing new frequency standards, and achieving phase-sensitive detection at ultra high frequencies. Light responsive materials with multiple energy levels suitable for multi-photon excitation are preferably used for nonlinear mixing via quantum interference of different excitation paths affecting a common energy level. Demodulation of a carrier with a demodulation frequency up to 100's THZ can be achieved for frequency comparison and phase-sensitive detection. A large number of materials can be used to cover a wide spectral range including the ultra violet, visible and near infrared regions. In particular, absolute frequency measurement in a spectrum from 1.25 &mgr;m to 1.66 &mgr;m for fiber optics can be accomplished with a nearly continuous frequency coverage.
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