Phase-coherent synthesis and precision frequency measurements in the far infrared
暂无分享,去创建一个
A short review of the basic concepts and problems in frequency multiplication into the infrared region of the electromagnetic spectrum is given. Results obtained with a multiplier chain starting from 5 MHz are reported. The carrier collapse is found at a frequency of about 15 THz. The present state of technological development is illustrated and the inherent limitations of this technique are indicated. The need for more spectral pure sources than those now available and/or different approaches is underlined in connection with the increasing thrust towards the measurement of visible frequencies.
[1] Fred L. Walls,et al. Measurement of the Short-Term Stability of Quartz Crystal Resonators and the Implications for Crystal Oscillator Design and Applications , 1975, IEEE Transactions on Instrumentation and Measurement.
[3] Aldo Godone,et al. Spectral Analysis of Synthesized Signals in the mm Wavelength Region , 1977, IEEE Transactions on Instrumentation and Measurement.
[4] Fred L. Walls,et al. RF Spectrum of a Signal after Frequency Multiplication; Measurement and Comparison with a Simple Calculation , 1975, IEEE Transactions on Instrumentation and Measurement.