An Integrated Millimeter-Wave Satellite Radiometer Working at Room-Temperature with High Photon Conversion Efficiency.
An Integrated Millimeter-Wave Satellite Radiometer Working at Room-Temperature with High Photon Conversion Efficiency.
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DOI：
10.3390/s22062400
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发表时间：
2022-03-21
期刊：
影响因子：
--
通讯作者：
García-Muñoz LE
中科院分区：
文献类型：
--
作者：
Abdalmalak KA;Botello GS;Suresh MI;Falcón-Gómez E;Lavado AR;García-Muñoz LE
本文介绍了一种用于星载对地观测的综合辐射计前端的设计。通过利用观测到的毫米波信号对激光泵浦进行有效的电光调制，然后检测产生的光边带，提出了一种替代传统低噪声放大器(LNAs)或肖特基混频器的室温低噪声接收机前端。通过三重共振高Q值铌酸锂(LN)语廊模式(WGM)谐振器中的非线性光学过程，实现了毫米波到1550 nm的高效上转换。通过设计一种微机械毫米波腔，在保证相位匹配的同时最大化与光学模式的重叠，该系统具有预计的每泵浦功率的归一化光子转换效率，在毫米波频率下超过最先进水平约三个数量级。设计了一种压电驱动的毫米波调谐机构，以补偿制造和组装公差，并降低制造工艺的复杂性。
In this work, the design of an integrated radiometer frontend for earth observation applications on satellites is presented. By means of the efficient electro-optic modulation of a laser pump with the observed millimeter-wave signal followed by the detection of the generated optical sideband, a room-temperature low-noise receiver frontend alternative to conventional Low Noise Amplifiers (LNAs) or Schottky mixers is proposed. Efficient millimeter-wave to 1550 nm upconversion is realized via a nonlinear optical process in a triply resonant high-Q Lithium Niobate (LN) Whispering Gallery Mode (WGM) resonator. By engineering a micromachined millimeter-wave cavity that maximizes the overlap with the optical modes while guaranteeing phase matching, the system has a predicted normalized photon-conversion efficiency per pump power, surpassing the state-of-the-art by around three orders of magnitude at millimeter-wave frequencies. A piezo-driven millimeter-wave tuning mechanism is designed to compensate for the fabrication and assembly tolerances and reduces the complexity of the manufacturing process.
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