Calibration method for terahertz laser power meter

A technology of laser power meter and calibration method, which is applied in the field of calibration of terahertz laser power meters, can solve problems such as large calibration uncertainty and long calibration time, and reduce standard uncertainty, reduce measurement error, and save testing the effect of time

Active Publication Date: 2016-03-23
CHINA ELECTRONIS TECH INSTR CO LTD
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Problems solved by technology

[0005] In the prior art, the terahertz laser power meter made of thermopile detect

Method used

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  • Calibration method for terahertz laser power meter
  • Calibration method for terahertz laser power meter
  • Calibration method for terahertz laser power meter

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[0031] The present invention will be described in detail below in conjunction with the drawings:

[0032] Technical background description: terahertz laser is used to output laser, and terahertz laser power meter is used to test the output laser power of terahertz laser.

[0033] The terahertz laser is irradiated on the thermopile detector, and the thermopile detector generates a voltage signal, which is proportional to the power of the terahertz laser. After the thermopile detector is connected to the terahertz laser power meter, the voltage signal generated by the thermopile detector is provided to the terahertz laser power meter, and the terahertz laser power meter calculates the indicated voltage and the corresponding power value according to the voltage signal. The adjustable DC power supply can directly output voltage, which can replace the thermopile detector and provide the input voltage signal for the terahertz laser power meter for calibration. The voltage signal describ...

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Abstract

The invention discloses a calibration method for a terahertz laser power meter. The method comprises the following steps: 1, replacing a thermopile detector for an adjustable direct-current stabilized voltage supply to provide stable tunable input voltage signals for the terahertz laser power meter, and recording the input voltage of the terahertz laser power meter and the corresponding indication voltage; 2, calculating a linear relation between the input voltage of the terahertz laser power meter and the indication voltage; 3, testing the absolute spectral response of the thermopile detector at a terahertz band; and 4, calculating the power value measured by the terahertz laser power meter according to the linear relation between the input voltage of the terahertz laser power meter and the indication voltage in step 2 and the absolute spectral response of the thermopile detector at the terahertz band in step 3. The calibration method improves the calibration efficiency and reduces the calibration inaccuracy.

Description

technical field [0001] The invention relates to the field of calibration of a laser power meter, in particular to a calibration method of a terahertz laser power meter. Background technique [0002] Terahertz refers to electromagnetic waves ranging from 0.1 THz to 10 THz, with a wide frequency range. At present, the detectors that can test the continuous terahertz laser power in the full frequency range at room temperature are mainly thermopile detectors. For the calibration of terahertz laser power meters made with thermopile detectors, there is a calibration time in the existing technology. Shortcomings of long time and large calibration uncertainty. [0003] After the laser power meter is developed, it must be calibrated to achieve accurate testing of laser power. The calibration of the laser power meter generally uses a standard detector to test the output power of the laser, and studies the relationship between the value provided by the measurement standard and the in...

Claims

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Application Information

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IPC IPC(8): G01J1/42G01J3/28
CPCG01J1/42G01J1/4257G01J3/28
Inventor 张鹏韩顺利董杰吴寅初韩强
Owner CHINA ELECTRONIS TECH INSTR CO LTD
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