A photoelectric transducer sensitivity adjustment device and method

By combining a light source module, a shielding cage, and an optical fiber bundle, ambient light interference is shielded. Attenuators and adjustable resistors are used to precisely adjust the sensitivity of the photoelectric converter, solving the problems of complex and costly photoelectric converter detection in existing technologies and achieving efficient sensitivity adjustment under ordinary laboratory conditions.

CN116734896BActive Publication Date: 2026-05-29TSINGHUA SHENZHEN INTERNATIONAL GRADUATE SCHOOL
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Patent Information

Application Number
CN202310817392.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-07-05
Publication Date
2026-05-29
Estimated Expiration
2043-07-05

AI Technical Summary

Technical Problem

Existing technologies for detecting the sensitivity of photoelectric converters are complex and costly, making it difficult to make precise adjustments under ordinary laboratory conditions, especially under nanowatt-level excitation light, which makes it difficult to adjust the output voltage of the photoelectric converter.

Method used

The device employs a combination of a light source module, a shielding cage, an optical fiber bundle, an optical power meter, a power supply, and a voltmeter. It uses the optical fiber bundle and shielding cage to block ambient light interference, utilizes an attenuator to reduce the optical power from the milliwatt level to the nanowatt level, and achieves precise adjustment of the output voltage by adjusting the adjustable resistor of the photoelectric converter.

Benefits of technology

Accurate adjustment of photoelectric converter sensitivity was achieved in a typical laboratory environment, reducing detection costs and difficulty, improving testing flexibility and efficiency, and making it suitable for excitation light of different wavelengths.

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Abstract

A photoelectric converter sensitivity adjusting device and method, comprising a light source module, a shielding cage, an optical fiber bundle, an optical power meter, a power supply, a photoelectric converter and a voltmeter, the light source module is used to generate test light, one end of the shielding cage is provided with a small hole for receiving the test light, the other end is provided with an optical fiber bundle connector connected with the optical fiber bundle, the test light entering the shielding cage from the small hole enters one end of the optical fiber bundle from the optical fiber bundle connector, the optical power meter is used to test the optical power emitted from the other end of the optical fiber bundle, the photoelectric converter has an optical fiber bundle connector and an output signal line, the optical fiber bundle connector is used to be detachably connected to the other end of the optical fiber bundle, and the voltmeter tests the output voltage of the photoelectric converter; the photoelectric converter is provided with a sensitivity adjusting resistor, and the output voltage can be changed under the same light intensity excitation. The device can shield the interference of environmental light in ordinary experimental environment, accurately adjust the sensitivity of the photoelectric converter, and has the advantages of low cost, high detection efficiency and convenient operation.
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