基于里德伯原子传感器的太赫兹光电混频发射-接收系统的SI可追溯校准与性能基准测试
SI-Traceable Calibration and Performance Benchmarking of a Terahertz Photomixer Transmitter-Receiver System Using a Rydberg Atomic Sensor
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中文总结 AI 辅助
本文利用里德伯原子传感器对204 GHz太赫兹光电混频收发系统进行SI可追溯校准与性能基准测试，实现电场绝对测量并建立原子传感器与传统传感器的定量联系。
中文摘要 AI 辅助
太赫兹（THz）频段电磁场强度的精确校准由于缺乏SI可追溯的场传感器而仍然具有挑战性。在此，我们演示了利用热原子蒸气中的里德伯电场传感，对工作在约204 GHz附近的商用基于光电混频的太赫兹发射-接收系统进行SI可追溯校准和性能基准测试。太赫兹电场从铯$17D_{5/2}\ ightarrow18P_{3/2}$里德伯跃迁的Autler-Townes（AT）效应中提取。我们测量AT分裂线强度随太赫兹失谐（相对于共振）的变化，以找到共振拉比频率，该频率与原子跃迁偶极矩和基本常数一起，得出太赫兹电场。原子测量的场校准了光电混频发射器的场和功率，而使用商用InGaAs光电混频接收器同时进行的测量则校准了接收器的电流-场响应度，并将其电流噪声底转换为绝对噪声等效太赫兹电场灵敏度。我们的研究表明，里德伯原子传感器为太赫兹发射和接收系统的SI可追溯校准和基准测试提供了一种实用方法，并为建立最先进传感器与基于原子的绝对太赫兹传感器之间的定量联系奠定了基础。
英文摘要
Accurate calibration of electromagnetic field strength in the terahertz (THz) frequency regime remains challenging due to the limited availability of SI-traceable field sensors. Here we demonstrate SI-traceable calibration and performance benchmarking of a commercial photomixer-based THz transmitter-receiver system operating near 204 GHz using Rydberg electric-field sensing in a thermal atomic vapor. The THz electric field is extracted from the Autler-Townes (AT) effect of the cesium $17D_{5/2}\rightarrow18P_{3/2}$ Rydberg transition. We measure the strength of AT-split lines as a function of THz detuning from resonance to find the on-resonant Rabi frequency, which, together with atomic transition dipole moments and fundamental constants, yields the THz electric field. The atomically measured field calibrates the photomixer transmitter field and power, while simultaneous measurements with a commercial InGaAs photomixer receiver calibrate the receiver's current-to-field responsivity and convert its current-noise floor into an absolute noise-equivalent THz electric-field sensitivity. Our study demonstrates that Rydberg atomic sensors provide a practical method for SI-traceable calibration and benchmarking of THz transmitter and receiver systems, and for the establishment of a quantitative link between state-of-the-art and absolute atom-based THz sensors.
发表机构
- Rydberg Technologies Inc.（Rydberg科技有限公司）
机构由 AI 辅助整理，请以论文原文为准。
