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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Journal ArticleDOI
Artificial modulation-free Pound-Drever-Hall method for laser frequency stabilization.
TL;DR: An artificial modulation-free Pound-Drever-Hall (PDH) method for laser frequency stabilization is proposed and demonstrated via two-color polarization spectroscopy of Rydberg electromagnetically induced transparency (EIT) resonance in a room-temperature rubidium vapor.
Journal ArticleDOI
Characterization of Yb-Er:glass lasers at 1.5 μm wavelength in terms of amplitude and frequency stability
TL;DR: In this paper, the 1.5 μm ytterbium-erbium laser was extensively investigated in terms of its intensity and frequency noise characteristics, and the energy transfer process between Yb and Er ions in the codoped active material was shown to reduce substantially the intensity noise induced by pump power fluctuations.
Journal ArticleDOI
Frequency locking by analysis of orthogonal modes
Michael Harvey,Andrew White +1 more
TL;DR: In this article, the authors describe a method for frequency locking a laser and a cavity, where the orthogonal modes from the laser are incident on a cavity such that only one mode is resonant at the desired frequency.
Journal ArticleDOI
A diode laser stabilization scheme for 40Ca+ single-ion spectroscopy
TL;DR: In this article, a Doppler-free frequency modulation technique was used to stabilize multiple laser pairs at wavelengths between 795 and 866 nm to the same atomic reference line.
Journal ArticleDOI
Resonator power to frequency conversion in a cryogenic sapphire oscillator
Nitin R. Nand,Stephen R. Parker,Eugene Ivanov,Jean Michel Le Floch,John G. Hartnett,John G. Hartnett,Michael E. Tobar +6 more
TL;DR: In this article, the power to frequency conversion in the resonant mode of a cryogenic sapphire loaded cavity resonator was investigated and it was shown that changes in radiation pressure and temperature in the dielectric contribute to a shift in the resonance frequency.
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.