HIGH-SENSITIVITY METHOD AND SYSTEM FOR MEASURING INTENSITY OF BROAD-BAND HYDROGEN OR DEUTERIUM ALPHA SPECTRAL LINE

摘要

Disclosed are a high-sensitivity method and system for measuring the intensity of a broad-band hydrogen or deuterium alpha spectral line. An avalanche photodiode of a hydrogen, deuterium alpha light receiving module converts an optical signal into a current signal and transfers the current signal to a current-to-voltage conversion module. A precise, high-speed operational amplifier of the current-to-voltage conversion module converts the current signal into a voltage signal, amplifies the voltage signal, and transfers the amplified voltage signal to an output amplification module. Finally, a video operational amplifier of the output amplification module amplifies the amplified voltage signal again and outputs the amplified voltage signal. The system in the present invention has high sensitivity, a broad bandwidth, a small size, a compact structure, good accessibility, and immunity to an environmental magnetic field. According to the method of the present invention, the high-sensitivity and broad-band measurement and application of spectrum intensity can be performed within the range of visible light (390 nm to 780 nm).