Asynchronous optical sampling and double optical comb integrated terahertz wave spectrum system

A terahertz spectrum and dual-comb technology, applied in the field of terahertz waves, can solve problems such as low spectral resolution, low system performance efficiency, and slow speed, and achieve high system performance, high spectral resolution, and scanning speed fast effect

Inactive Publication Date: 2019-10-25
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

[0004] But so far, the asynchronous optical sampling and dual-comb spectroscopy technology has not been applied to the actual corresponding physical system in the field, and the traditional technology uses a single light source plus moving parts (Michelson interfe

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  • Asynchronous optical sampling and double optical comb integrated terahertz wave spectrum system

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[0021] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the following embodiments specifically illustrate the asynchronous optical sampling and dual-comb integrated terahertz spectroscopy system of the present invention in conjunction with the accompanying drawings.

[0022] figure 1 It is a schematic diagram of the principle of the terahertz spectrum system integrated with asynchronous optical sampling and dual optical combs in the embodiment of the present invention; figure 2 It is a schematic diagram of the optical path of the terahertz spectroscopy system with asynchronous optical sampling and dual optical comb integration in the embodiment of the present invention.

[0023] Such as figure 1 As shown, the asynchronous optical sampling and dual optical comb integrated terahertz spectroscopy system 100 in this embodiment generates heterodyne optical comb signals in the radio frequency domain ba...

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Abstract

The invention provides an asynchronous optical sampling and double optical comb integrated terahertz wave spectrum system. The system includes a first femto second laser light source with an optical comb emitting pumped laser, a second femto second laser light source with an optical comb emitting detection laser, a first photo-conductive antenna, a terahertz wave gathering assembly and a second photo-conductive antenna, intervals of the pumped laser optical pump and the detection laser optical comb in the frequency domain are first predetermined repetition rate and second predetermined repetition rate respectively, a first offset voltage is applied to the first first photo-conductive antenna so that the first predetermined repetition rate is decreased to the terahertz frequency band to form a terahertz wave emitting optical comb, the terahertz wave gathering assembly transmits and gathers the terahertz wave optical comb to form a focus, the focus is positioned on the second photo-conductive antenna, and the terahertz wave emitting optical comb and the detection laser emitting optical comb generate RF-domain heterodyne optical comb signals by a multifrequency heterodyne process.

Description

technical field [0001] The invention belongs to the technical field of terahertz waves, and in particular relates to a terahertz wave spectrum system integrated with asynchronous optical sampling and double optical combs. Background technique [0002] Terahertz (THz) waves are electromagnetic waves that lie between microwaves and far infrared rays. In recent years, with the development of ultrafast laser technology, the generation of terahertz pulses has a stable and reliable excitation source, which enables people to study the characteristics of terahertz waves and their interactions with matter. Terahertz has a wide range of applications in biomedicine, safety monitoring, non-destructive detection, astronomy, spectroscopy and imaging technology, and information science. Asynchronous optical sampling and dual-comb spectroscopy are new spectral analysis technologies, which have attracted much attention due to their advantages such as short spectrum formation time, high freq...

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Application Information

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IPC IPC(8): G01N21/3586G01J3/28
CPCG01J3/28G01N21/3586
Inventor 付荟郭旭光蒋兴乐朱亦鸣
Owner UNIV OF SHANGHAI FOR SCI & TECH
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