A Broad Spectrum Calorimetric Optical Power Meter

Abstract

The invention relates to a broad-spectrum calorimetric type optical power meter and an optical power measuring method. The optical power meter comprises a shutter and a detector which are arranged successively along the optical axis, the detector comprises a front-end pretreatment device, a tapered cavity, a thermopile, a thermoelectric force measuring device and an electric power measuring device arranged successively along the optical axis, a variable resistor is connected between the front-end pretreatment device and the electric power measuring device, and a switch and a power supply in serial connection are also connected between the front-end pretreatment device and the electric power measuring device. The optical power meter has the advantages of high response speed, high sensitivity and wide spectrum measuring range.

Description

technical field [0001] The invention relates to the measurement field, in particular to a wide-spectrum calorimetric optical power meter. Background technique [0002] The main purpose of the optical power meter is to measure the magnitude and change of optical power, which is generally composed of detectors, data processing and display parts. In some production application fields, there are strict requirements on the wavelength and power of the required laser, which requires the optical power meter to accurately measure the optical power of various wavelengths. The core device of the optical power meter is the detector. Optical power meters equipped with different types of detectors have different application ranges and different measurement accuracy. Optical power meters are divided into photoelectric type and calorimetric type according to the different detectors. With the development of photoelectric technology, the current common detectors are mostly photoelectric, but...

AI Technical Summary

Problems solved by technology

With the development of photoelectric technology, the current common detectors are mostly photoelectric, but photoelectric optical power meters generally can only measure the optical power of a single wavelength, which needs to be measured by replacing the detector, filter or manual shifting Optical power of multiple wavelengths, the measurement process is complicated, and has the disadvantages of low measurement accuracy and poor stability, which cannot meet the requirements of wide spectrum and high accuracy

The calorimetric optical power meter has the advantages of flat spectral response curve and high accuracy, but its response speed is slow, the sensitivity is low, and the spectral measurement range is limited.

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