Quantum measurement method for laser power

A technology of laser power and measurement method, which is applied in the field of optical metrology, can solve problems such as not being able to meet the needs of precision measurement, and achieve the effects of realizability, measurement accuracy improvement, and strong technological disruption

Active Publication Date: 2018-11-30
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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Problems solved by technology

The current measurement methods mainly focus on the research of high-precision detectors. The method is mainly to directly measure the optical power. According to the different ranges of laser power and wavelength to be measured, the uncertainty of power measurement ranges from 0.01% to 2%. unequal, that is, the optimal measurement uncertainty only reaches 10 -4 The order of magnitude is far from meeting the needs of precision measurement
[0003] Therefore, it is urgent to improve the measurement method and propose a new measurement method to break through the accuracy limitation of direct measurement of optical power

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Embodiment Construction

[0047] In order to make the purpose, technical solution and advantages of the measurement method involved in the present invention more clear, the method of the present invention will be combined with specific examples below to illustrate and illustrate. Apparently, the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0048] Concrete measuring method of the present invention is as follows:

[0049] Using the effect of optical frequency shift in the atomic frequency standard system, the laser power of a specific wavelength is measured. First set up the space optical path, and the atomic frequency standard system works normally; measure the output frequency ν of the atomic frequency standard system before the incident laser is incident...

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Abstract

The invention discloses a quantum measurement method for laser power. According to the quantum measurement method, atomic characteristics and an atomic frequency scale system are utilized, direct measurement of the laser power is converted into measurement of an atomic transition frequency, and the quantum measurement method is combination of an atomic spectrometry technique and optical power measurement. Compared with an existing method, the quantum measurement method has innovation in principle. The achievable measurement precision of an existing measurement method is limited, and the reported optimum value is in an order of magnitude of 10<-4> and cannot meet the increasing precision measurement requirements. According to the quantum measurement method, the measurement precision is improved, can be improved by 1-2 orders of magnitude or more theoretically and can reach the order of magnitude of 10<-5> to 10<-6>. The measurement capability on the laser power is improved, the opticalmeasurement capability is improved and the development of the laser measurement industry can be promoted.

Description

technical field [0001] The invention relates to the technical field of optical metrology. More specifically, it relates to a method for quantum measurement of laser power. Background technique [0002] In the fields of laser processing, laser medical treatment, laser detection, and basic scientific research, the requirements for accurate measurement of various laser parameters are getting higher and higher, one of which is the precise measurement of laser power. The current measurement methods mainly focus on the research of high-precision detectors. The method is mainly to directly measure the optical power. According to the different ranges of laser power and wavelength to be measured, the uncertainty of power measurement ranges from 0.01% to 2%. unequal, that is, the optimal measurement uncertainty only reaches 10 -4 The order of magnitude is far from meeting the needs of precision measurement. [0003] Therefore, it is urgent to improve the measurement method and prop...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J1/00
CPCG01J1/00
Inventor 薛潇博杨仁福张振伟赵环王暖让陈星张旭陈海波
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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