Journal ArticleDOI
Electronic frequency stabilization of microwave oscillators.
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TLDR
Two circuits for use to control the frequency of a microwave oscillator by an external high Q cavity are described, and a technique by which the frequency‐stabilization systems could be used to investigate the structure of microwave absorption spectra is suggested.Abstract:
Two circuits for use to control the frequency of a microwave oscillator by an external high Q cavity are described. One of the circuits uses a microwave equivalent of the frequency discriminator, in conjunction with a d.c. amplifier. The other uses the cavity in a special circuit that provides an intermediate‐frequency signal that is a measure of the difference between the frequencies of the oscillator and cavity. This allows the use of an intermediate‐frequency amplifier. The resulting stability of the oscillators is such that audible beat frequencies can be produced between two oscillators at 10,000 Mc/sec. The resultant signal can be frequency modulated at audiofrequencies, with stabilization acting throughout the modulation cycle. A technique by which the frequency‐stabilization systems could be used to investigate, with high resolution, the structure of microwave absorption spectra is suggested.read more
Citations
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New Method to Build a High Stability Sapphire Oscillator from the Temperature Compensation of the Difference Frequency
TL;DR: It is shown that it is possible to design a resonator with transverse electric and magnetic modes at different frequencies, but with the same TCF in units hertz per kelvin, resulting in temperature compensation of the difference frequency.
Journal ArticleDOI
Experimental Side-Channel-Secure Quantum Key Distribution
TL;DR: In this article , a side-channel-secure quantum key distribution protocol was proposed, which is not only measurement-device independent, but also immune to all side channel attacks to the photons emitted from Alice's and Bob's labs.
Journal ArticleDOI
Microwave Frequency Measurements and Standards
Benjamin F. Husten,Harold Lyons +1 more
Proceedings ArticleDOI
Phase and frequency noise metrology
TL;DR: In this paper, the authors focus on the measurement of phase noise, which is the main focus of this article. But, the authors do not consider the effect of the phase noise on the optical properties of the optical fiber links.
Journal ArticleDOI
Far Off-Resonance Laser Frequency Stabilization Technology
TL;DR: In this paper, the authors present several far off-resonance laser frequency stabilization methods, by which the probe beam can be locked on the detuning as far as several tens of gigahertz (GHz) away from the atomic resonance line, and discuss existing challenges and possible future directions in this field.
References
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Journal ArticleDOI
The Absorption of One-Half Centimeter Electromagnetic Waves in Oxygen
TL;DR: In this paper, the absorption of electromagnetic waves in the one-half cm wave-length range has been measured for both pure and mixed mixtures as a function of pressure, and the measured values are in agreement with the theory of Van Vleck both as regards the absolute value of the absorption (which is as great as 67 db/km at the band center for pure mixtures at a pressure of one atmosphere) and the dependence on pressure.