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Method and device for measuring frequency stability of femtosecond laser frequency comb

A frequency stability, femtosecond laser technology, used in measurement devices, optical radiation measurement, measurement optics, etc., can solve the problem of high equipment requirements, and achieve the effects of low cost, easy implementation and simple structure

Active Publication Date: 2013-12-04
BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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Problems solved by technology

[0003] The purpose of the present invention is to propose a method and device for measuring the frequency stability of femtosecond laser frequency combs in order to overcome the problem that the existing dual-comb interbeating technology has high requirements for equipment

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  • Method and device for measuring frequency stability of femtosecond laser frequency comb
  • Method and device for measuring frequency stability of femtosecond laser frequency comb
  • Method and device for measuring frequency stability of femtosecond laser frequency comb

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Embodiment

[0023] A method and device for measuring the frequency stability of a femtosecond laser frequency comb, such as figure 1 As shown, it includes a femtosecond laser frequency comb 1, an atomic clock 2, a frequency synthesizer 3, a mixer 4, a time-frequency counter 5, a frequency synthesizer 6, a mixer 7, a time-frequency counter 8, and an electronic computer 9.

[0024] The repetition frequency f is extracted separately from the spectrum generated by the femtosecond laser frequency comb 1 r =350MHz and offset frequency f 0 =20MHz, the two have been locked to the reference frequency 10MHz of the atomic clock 2. The frequency of the atomic clock 2 is synthesized by the frequency synthesizer 3 to obtain a frequency close to the offset frequency f 0 The frequency value is 15MHz, and the offset frequency f 0 The difference frequency Δf of the two is obtained by mixing with the mixer 4 0 =5MHz, use the external time base to lock the time frequency counter 5 on the frequency of the...

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Abstract

The invention relates to a method and a device for measuring frequency stability of a femtosecond laser frequency comb, and belongs to the field of physics and optical engineering and the technical field of metrology testing. The device is simple in structure, low in cost and easy to implement, and influence caused by frequency stability of an atomic clock is offset in such a manner that the femtosecond laser frequency comb, a time frequency counter, a frequency synthesizer and the like share the reference frequency of the same atomic clock, so that the repetition frequency, the deviation frequency and frequency stability measuring results of the femtosecond laser frequency comb without the stability influence of the atomic clock are obtained.

Description

technical field [0001] The invention relates to a method and device for measuring the frequency stability of a femtosecond laser frequency comb, and belongs to the fields of physics, optical engineering, and measurement and testing technology. Background technique [0002] Femtosecond laser technology represented by femtosecond laser frequency comb can realize laser frequency measurement and can give extremely high comb frequency accuracy, for example, up to 10 -13 、10 -14 or even higher. Since this accuracy is achieved by locking the repetition frequency and offset frequency of the femtosecond laser frequency comb to the atomic clock frequency, people are looking for higher accuracy and stability of the atomic clock for femtosecond laser frequency Locking, in turn, is trying to figure out how to measure the frequency stability of femtosecond laser frequency combs themselves, removing the influence of atomic clock frequency stability. The mutual beating method of dual opt...

Claims

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Application Information

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IPC IPC(8): G01J9/00
Inventor 梁志国武腾飞张大鹏李新良
Owner BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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