Device and method for measuring signal-to-noise ratio based on single pulse for generating pulse sequence

A pulse sequence and measurement device technology, applied in the optical field, can solve the problems of low time domain resolution, complex structure, low dynamic range, etc., and achieve the effect of high precision and simple device structure

Active Publication Date: 2014-10-01
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

However, the structure of this method is relatively complicated, and components such as optical attenuators, fiber couplers, fiber isolators, wavelength division multiplexers, and ytterbium-doped gain fibers need to be used, and it involves the dispersion problem in gain fibers, and generally only applicable In add...

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  • Device and method for measuring signal-to-noise ratio based on single pulse for generating pulse sequence
  • Device and method for measuring signal-to-noise ratio based on single pulse for generating pulse sequence
  • Device and method for measuring signal-to-noise ratio based on single pulse for generating pulse sequence

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Embodiment Construction

[0037] The present invention proposes a signal-to-noise ratio measurement device and method based on a single pulse generated by a pulse sequence, combined with the attached figure 1 , the structure of the measuring device in the present invention is described: the device includes a beam splitter 2, a double-sided mirror 1, a mirror 4, a first sum frequency crystal 5, a second sum frequency crystal 13, a dichroic mirror 6, λ / 2 half-wave plate 7, lens 9, stepper motor 14 and detector CCD11;

[0038] The beam splitter 2 divides the measured single pulse into a first fundamental frequency pulse 16 and a second fundamental frequency pulse 3;

[0039] The optical path of the first fundamental frequency pulse 16 is facing with a double-sided reflector 1;

[0040] The optical path of the second fundamental frequency pulse 3 is sequentially provided with a reflector 4, a first sum frequency crystal 5, a dichroic mirror 6 and a λ / 2 half-wave plate 7;

[0041] The first fundamental f...

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Abstract

The invention belongs to the technical field of optics, and relates to a measuring device and method, in particular to a device and method for measuring the signal-to-noise ratio based on a single pulse for generating a pulse sequence. The device comprises a beam splitter, a double-sided reflection mirror, a reflection mirror, a first sum-frequency crystal, a second sum-frequency crystal, a dichroscope, a lambda/2 half-wave plate, a lens, a stepping motor and a detector CCD. The measured single pulse obtains the curve that the strength of the third harmonic pulse sequence changes along with retardation through the elements, and the signal-to-noise ratio of the measured single pulse is calculated through the curve. The method is simple in principle, the device is compact in structure, debugging is easy, and measurement precision is high.

Description

technical field [0001] The invention belongs to the field of optical technology, and relates to a measuring device and method, in particular to a signal-to-noise ratio measuring device and method based on a single pulse of a generated pulse sequence. Background technique [0002] Femtosecond laser pulses, as a short-pulse-width, high-intensity laser light source, are widely used in strong field physics, detection of microscopic properties of matter, large-capacity information storage, high-speed optical communication, etc. than have high requirements. When the peak power of the pre-pulse exceeds the ionization threshold of the medium, an ionization reaction will occur with the surface of the medium before the main pulse to form a plasma surface, thereby changing the properties of the medium, affecting the interaction between the main pulse and the medium, and even the interaction between the main pulse and the medium Doesn't work as expected at all. This is very important ...

Claims

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Application Information

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IPC IPC(8): G01J11/00
Inventor 刘红军韩靖孙启兵黄楠
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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