Friday, November 17, 2017

Abstract-Continuous-wave 1550 nm operated terahertz system using ErAs:In(Al)GaAs photo-conductors with 52 dB dynamic range at 1 THz




A.D.J. Fernandez Olvera, H. Lu, A. C. Gossard, and S. Preu

https://www.osapublishing.org/oe/abstract.cfm?uri=oe-25-23-29492

Telecom-wavelength compatible photoconductors benefit strongly from the large amount and affordability of telecom lasers and components but there are demanding requirements on material development. We demonstrate continuous-wave (CW) photomixing with a setup that only uses ErAs:In(Al)GaAs devices with a peak dynamic range (DNR) of 78 dB and a bandwidth of ∼3.65 THz at an integration time of 300 ms and only 26 mW laser power on each device. The ErAs:InGaAs receiver further features a factor of two lower noise equivalent power (NEP) than a state-of-the-art photoconductor, despite an antenna mismatch.
© 2017 Optical Society of America under the terms of the OSA Open Access Publishing 

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