Cryogenic W-Band SiGe BiCMOS Low-Noise Amplifier

Varonen, Mikko; Sheikhipoor, Nima; Gabritchidze, Bekari; Cleary, Kieran; Forstén, Henrik; Rücker, H.; Kaynak, Mehmet

doi:10.1109/ims30576.2020.9223922

Cited by 11 publications

(3 citation statements)

References 17 publications

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“…Detection is typically done using shotnoise-limited balanced pulsed homodyne detectors 41 whose operation speed and stability can greatly benefit from PIC integration and dedicated electronics. 132 We, therefore, plan to exploit fast Ge PDs in combination with our in-house expertise in ultrafast electronics 133,134 to develop balanced photodetectors with a speed above 50 GHz. We stress that even though the speed of our present Ge PDs is limited to about 40 GHz, suitably designed Ge PDs with smaller volumes have been recently demonstrated to reach up to 265 GHz.…”

Section: Cv-qkdmentioning

confidence: 99%

“…We, therefore, plan to exploit fast Ge PDs in combination with our in-house expertise in ultrafast electronics 133 , 134 to develop balanced photodetectors with a speed above 50 GHz. We stress that even though the speed of our present Ge PDs is limited to about 40 GHz, suitably designed Ge PDs with smaller volumes have been recently demonstrated to reach up to 265 GHz 135 .…”

Section: Qkd Receiversmentioning

confidence: 99%

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Supporting quantum technologies with an ultralow-loss silicon photonics platform

et al. 2023

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Photonic integrated circuits (PICs) are expected to play a significant role in the ongoing second quantum revolution, thanks to their stability and scalability. Still, major upgrades are needed for available PIC platforms to meet the demanding requirements of quantum devices. We present a review of our recent progress in upgrading an unconventional silicon photonics platform toward this goal, including ultralow propagation losses, low-fiber coupling losses, integration of superconducting elements, Faraday rotators, fast and efficient detectors, and phase modulators with low-loss and/or low-energy consumption. We show the relevance of our developments and our vision in the main applications of quantum key distribution, to achieve significantly higher key rates and large-scale deployment; and cryogenic quantum computers, to replace electrical connections to the cryostat with optical fibers.

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Section: Cv-qkdmentioning

confidence: 99%

Section: Qkd Receiversmentioning

confidence: 99%

Supporting quantum technologies with an ultralow-loss silicon photonics platform

et al. 2023

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“…Cryogenic LNAs are essential and often indispensable for branches of science like astronomy [20]. Typically, two types of transistors are utilized in cryogenic LNAs: High Electron Mobility Transistor (HEMT) [19][20][21] and Silicon-Germanium Heterojunction Bipolar Transistor [20,21]. Notably, HEMT technology remains unaffected by freeze-out at cryogenic temperatures [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Design of ultra-low noise amplifier for quantum applications (QLNA)

Salmanogli,

Sirat

2024

Quantum Inf Process

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The present article primarily focuses on the design of an ultra-low-noise amplifier specifically tailored for quantum applications. The circuit design places a significant emphasis on improving the noise figure, as quantum-associated applications require the circuit's noise temperature to be around 0.4 K. This requirement aims to achieve performance comparable to the Josephson Junction amplifier. Although this task presents considerable challenges, the work concentrates on engineering the circuit to minimize mismatch and reflection coefficients, while simultaneously enhancing circuit transconductance. These efforts aim to improve the noise figure as efficiently as possible. The results of this study indicate the possibility of achieving a noise figure of approximately 0.009 dB for a unique circuit design operating at 10 K. In a departure from traditional approaches, this study employs quantum mechanical theory to analyze the circuit comprehensively. By employing quantum theory, the researchers derive relationships that highlight the crucial quantities upon which the circuit design should focus to optimize the noise figure. For example, the circuit's gain power, which depends on the circuit's photonic modes, is theoretically derived and found to affect the noise figure directly. Ultimately, by merging quantum theory with engineering approaches, this study successfully designs a highly efficient circuit that significantly minimizes the noise figure in a quantum application setting.

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