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Atomic frequency standard and servo locking method

An atomic frequency standard and quantum technology, which is applied in the field of atomic frequency standard, can solve the problems of pulling the output frequency of the whole atomic frequency standard machine, and the amplitude of the comprehensive modulation signal is unstable, so as to achieve the effect of improving the accuracy of the output frequency.

Active Publication Date: 2013-09-11
JIANGHAN UNIVERSITY
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Problems solved by technology

[0006] In order to solve the problem in the prior art that the amplitude of the integrated modulation signal is not stable, and then the output frequency of the complete atomic frequency standard is pulled, the embodiment of the present invention provides an atomic frequency standard and a servo locking method

Method used

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  • Atomic frequency standard and servo locking method
  • Atomic frequency standard and servo locking method

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Embodiment 1

[0053] An embodiment of the present invention provides an atomic frequency standard, see figure 1 , the atomic frequency standard includes:

[0054] Voltage controlled crystal oscillator 101;

[0055] A synthesis module 104, configured to generate a synthesis modulation signal;

[0056] The amplitude stabilization module 105 is used to convert the amplitude of the integrated modulation signal generated by the integration module 104 to a predetermined value to obtain an amplitude stabilization integrated modulation signal;

[0057] The radio frequency frequency multiplication module 103 is used to perform frequency multiplication on the output signal of the voltage-controlled crystal oscillator 101 to obtain a frequency multiplication signal;

[0058]The microwave frequency multiplication and mixing module 106 is used to mix the frequency multiplication signal multiplied by the amplitude stabilization integrated modulation signal produced by the amplitude stabilization module...

Embodiment 2

[0116] An embodiment of the present invention provides a servo locking method for an atomic frequency standard, see figure 2 , the method includes:

[0117] Step 201: Generate an integrated modulation signal.

[0118] Step 202: The amplitude stabilization module converts the amplitude of the integrated modulation signal to a predetermined value to obtain an amplitude stable integrated modulation signal.

[0119] Preferably, step 202 may include:

[0120] Step 1. Sampling the voltage value of the integrated modulation signal, and calculating the actual amplitude according to the sampled voltage value, and calculating the amplification factor according to the predetermined value and the actual amplitude. The actual amplitude refers to the peak and valley of the sampled voltage value within one cycle The difference between the values.

[0121] It is worth noting that the predetermined value here can be set according to the following method: assuming that the amplitudes of fre...

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Abstract

The invention discloses an atomic frequency standard and a servo locking method and belongs to the technical field of atomic frequency standards. The atomic frequency standard comprises a voltage controlled crystal oscillator, a comprehensive module, an amplitude stabilizing module, a radio frequency doubling module, a microwave mixed frequency doubling module, a physical unit and a servo module. The comprehensive module is used for generating comprehensive modulation signals. The amplitude stabilizing module is used for converting the amplitude of the comprehensive modulation signals to a preset value to obtain the amplitude-stabilized comprehensive modulation signals. The radio frequency doubling module is used for doubling frequency of output signals of the voltage controlled crystal oscillator to obtain frequency doubled signals. The microwave frequency doubling module is used for mixing and doubling the amplitude-stabilized comprehensive modulation signals and the frequency doubled signals to generate microwave search signals. The physical unit is used for subjecting the microwave search signals to quantum frequency discrimination to generate quantum frequency discrimination signals. The servo module is used for subjecting the quantum frequency discrimination signals to synchronous phase discrimination and generating rectifying voltage to act on the voltage controlled crystal oscillator. By converting the amplitude of the comprehensive modulation signals to the preset value to obtain the comprehensive modulation signals with stable amplitude, output frequency accuracy of the integral atomic frequency standard is improved.

Description

technical field [0001] The invention relates to the technical field of atomic frequency standards, in particular to an atomic frequency standard and a servo locking method. Background technique [0002] In order to obtain a relatively stable time frequency in nature, people apply a weak magnetic field to atoms such as rubidium, cesium, hydrogen, etc., to change the atomic energy level from the ground state to the excited state, and use the ground state hyperfine structure 0-0 The transition center frequency is used as the reference time frequency value. [0003] The atomic frequency standard made by using the above principles mainly includes the following parts: voltage-controlled crystal oscillator, isolation amplifier, radio frequency multiplier module, microwave frequency multiplier mixing module, physical unit, servo module and comprehensive module; the output signal of the isolation amplifier to the voltage-controlled crystal oscillator For isolation and amplification,...

Claims

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Application Information

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IPC IPC(8): H03L7/26
Inventor 雷海东
Owner JIANGHAN UNIVERSITY
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