全光纤耦合式太赫兹近场探针光谱成像系统
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国家重点研发计划(2019YFC0810900);上海市“科技创新行动计划”社会发展科技攻关项目(22dz1200302)


All-fiber coupling type terahertz near-field probe spectral imaging system
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    摘要:

    通过对太赫兹光电导探针天线与飞秒倍频光路进行光纤模块化封装,并结合光纤耦合式太赫兹光电导天线辐射源,以及自主研制设计的光纤飞秒激光光源和光纤式高速光学延时线,开发了一种全光纤耦合式太赫兹近场探针光谱成像系统,其光谱范围覆盖0.1~2.0 THz,动态范围达到60 dB,光谱采样速度高达0.1 s/谱,近场成像分辨率优于20 μm的全光纤耦合式太赫兹近场探针光谱成像系统。得益于整套系统的全光纤结构设计,太赫兹辐射源和探针式探测器之间可以根据测量需求灵活调节而不需要重新校准光路,极大地提高了系统的工作稳定性和使用方便性。该研究为太赫兹科学研究提供了一种高性能且实用性强的太赫兹近场光谱成像测量系统。

    Abstract:

    In order to develop an all-fiber-coupled terahertz near-field probe spectroscopy imaging system, an all-fiber-coupled terahertz photoconductive probe antenna and a femtosecond multiplier optical path were fiber modularly packaged and combined with a fiber-coupled terahertz photoconductive antenna radiation source, as well as an independently developed and designed fiber-optic femtosecond laser light source and fiber-based high-speed optical delay line. The all-fiber-coupled terahertz near-field probe spectroscopic imaging system with a dynamic range of 60 dB, a spectral sampling speed of up to 0.1 sec/spectra and a near-field imaging resolution better than 20 μm was reported for the first time. Benefit from the all-fiber structure design of the entire system, the terahertz radiation source and the probe detector can be flexibly adjusted according to the measurement needs without recalibrating the optical path. The working stability and the use convenience of the system are greatly improved. The research results of this work provide a high-performance and practical terahertz near-field spectral imaging measurement system for terahertz scientific research.

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王刚,曹佳炜,袁英豪.全光纤耦合式太赫兹近场探针光谱成像系统[J].上海理工大学学报,2024,46(5):539-544.

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  • 收稿日期:2023-03-23
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  • 在线发布日期: 2024-10-29