Miniaturized terahertz time domain spectrometer device and analysis method

Abstract

The invention relates to a miniaturized terahertz time domain spectrometer device and an analysis method, the device comprises a femtosecond fiber laser, a polarization beam splitter, an optical delayline, a terahertz emitter, a first parabolic mirror, a first lens, a second parabolic mirror, a second lens, a terahertz detector, and a data acquisition system; the polarization beam splitter is disposed at the transmitting end of a femtosecond fiber laser, and laser emitted by the femtosecond fiber laser passes through the polarization beam splitter to form a detection optical path and a pumping optical path; the first lens is disposed between the first parabolic mirror and the second parabolic mirror; the second lens is disposed between the detection optical path and the pumping optical path and the terahertz detector, and light from the detection optical path and the pumping light path enters the terahertz detector through the second lens, and is focused on a substance to be tested bythe first lens, the need of the optical path and a plurality of focal points on one plane is not required, an actual optical path is simple, the fixation is convenient, and the focusing is more accurate.

Description

technical field [0001] The invention relates to the technical field of terahertz time-domain spectroscopy, in particular to a miniaturized terahertz time-domain spectrometer device and analysis method. Background technique [0002] Terahertz waves refer to electromagnetic waves with frequencies in the range of 0.1THz to 10THz, with wavelengths in the range of 0.03 to 3mm, between microwave and infrared Terahertz waves refer to electromagnetic waves with frequencies in the range of 0.1THz to 10THz, with wavelengths of about 3mm range, between microwave and infrared. The physical and chemical properties of various optical materials (insulators, semiconductors, liquids, and superconductors) can be probed and effectively identified using terahertz waves. The terahertz time-domain spectrometer uses a focused terahertz beam to irradiate the measured substance, quickly measures the terahertz absorption spectrum of the substance, and then compares it with the spectrum in the spectr...

AI Technical Summary

Problems solved by technology

[0003] To this end, it is necessary to provide a miniaturized terahertz time-domain spectrometer device and analysis method, which solves the difficulty of accurately focusing the two parabolic mirrors of the existing terahertz time-domain spectrometer to collimate and focus on the alignment optical path on the measured substance, and The problem that the other two parabolic mirrors are collimated and focused to receive the light passing through the measured substance and the probe light are difficult to converge on the same position of the terahertz detector

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