On the quantum-limit of the noise temperature in balanced correlation receivers

Ernest A. Michael; Massinissa Hadjara; Felipe E. Besser; Miguel I. Piña; Daniella Pollarolo; Antonio Rodriguez

doi:10.1117/12.2563146

13 December 2020 On the quantum-limit of the noise temperature in balanced correlation receivers

Ernest A. Michael, Massinissa Hadjara, Felipe E. Besser, Miguel I. Piña, Daniella Pollarolo, Antonio Rodriguez

Proceedings Volume 11446, Optical and Infrared Interferometry and Imaging VII; 114462W (2020) https://doi.org/10.1117/12.2563146
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

Recent results for the cross-correlation signal of a newly proposed balanced correlation receiver at 1.5 μm pointed towards a possible bypassing of the standard quantum limit for the receiver noise-temperature hν⁄k in cross-correlation by a factor of 4-6. The only radiation source strong enough for a clear hot-cold measurement was a heavily attenuated fiber-coupled superluminant LED (SLED), because a multi-mode fiber-coupled thermal halogen lamp was difficult to control in polarization due to its weakness when coupled to a single-mode fiber. This peculiarity left some doubts regarding a possible “strange” quantum-mechanical behavior of the signal light from the SLED. Here we want to present the concept for more convincing measurements using a true thermal signal source.

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Ernest A. Michael, Massinissa Hadjara, Felipe E. Besser, Miguel I. Piña, Daniella Pollarolo, and Antonio Rodriguez "On the quantum-limit of the noise temperature in balanced correlation receivers", Proc. SPIE 11446, Optical and Infrared Interferometry and Imaging VII, 114462W (13 December 2020); https://doi.org/10.1117/12.2563146

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