Photoconductive antenna as local oscillator in terahertz frequency measurement: heterodyne efficiency and bias effect
Sign Up to like & getrecommendations! Published in 2018 at "Optical and Quantum Electronics"
DOI: 10.1007/s11082-018-1577-y
Abstract: In a photoconductive antenna (PCA), femtosecond-laser-excited carriers will form a broadband terahertz photon-carrier (PC) comb, and the terahertz PC comb can be used as a multi-frequency local oscillator to carry out heterodyne detection of continuous… read more here.
Keywords: local oscillator; photoconductive antenna; frequency; heterodyne ... See more keywords
Compact and sensitive heterodyne receiver at 2.7 THz exploiting a quasi-optical HEB-QCL coupling scheme
Sign Up to like & getrecommendations! Published in 2019 at "Applied Physics Letters"
DOI: 10.1063/1.5116351
Abstract: We demonstrate a sensitive and compact terahertz heterodyne detection system based on a quantum cascade laser (QCL) as a local oscillator and a hot electron bolometer (HEB) as a mixer. It relies on an original… read more here.
Keywords: heb; thz; heterodyne; qcl ... See more keywords
Analysis of the effects of imperfections in an optical heterodyne quantum random-number generator
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review A"
DOI: 10.1103/physreva.99.052305
Abstract: Quantum random numbers generators (QRNGs) rely on quantum systems to produce sequences of random numbers with an overall lower level of predictability than classical algorithmic systems. Over the past two decades, phase randomizations of coherent… read more here.
Keywords: number; analysis; heterodyne; random numbers ... See more keywords
Terahertz Heterodyne Communication Using GaAs Field-Effect Transistor Receiver
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Electron Device Letters"
DOI: 10.1109/led.2016.2624782
Abstract: We report the first successful terahertz heterodyne communication using a field-effect transistor for detection. The communication is a real-time transmission of an uncompressed high-definition TV signal at a data rate of 1.5 Gbps with a… read more here.
Keywords: heterodyne communication; terahertz heterodyne; communication; heterodyne ... See more keywords
A Reflective-Type Heterodyne Grating Interferometer for Three-Degree-of-Freedom Subnanometer Measurement
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Transactions on Instrumentation and Measurement"
DOI: 10.1109/tim.2022.3213005
Abstract: A heterodyne grating interferometer (HTGI) able to simultaneously measure the three-axis translational displacements of ultraprecision motion stages with a subnanometer resolution is demonstrated. The HTGI is composed of two main parts: a reflective planar grating… read more here.
Keywords: heterodyne; heterodyne grating; grating interferometer; measurement ... See more keywords
Multi-axis heterodyne interferometry at MHz frequencies: a short-arm measurement demonstration for LISA with off-the-shelf hardware.
Sign Up to like & getrecommendations! Published in 2019 at "Applied optics"
DOI: 10.1364/ao.58.006346
Abstract: We report the design, construction, and operation of a multi-axis heterodyne interferometry (MAHI) system operating at MHz heterodyne frequencies, which provides a testbed for technologies to be used in the Laser Interferometer Space Antenna (LISA)… read more here.
Keywords: multi axis; mhz frequencies; heterodyne; axis heterodyne ... See more keywords
Plasmonic heterodyne spectrometry for resolving the spectral signatures of ammonia over a 1-4.5 THz frequency range.
Sign Up to like & getrecommendations! Published in 2019 at "Optics express"
DOI: 10.1364/oe.27.036838
Abstract: We present a heterodyne terahertz spectrometry platform based on plasmonic photomixing, which enables the resolution of narrow spectral signatures of gases over a broad terahertz frequency range. This plasmonic heterodyne spectrometer replaces the terahertz mixer… read more here.
Keywords: plasmonic heterodyne; spectrometry; frequency range; heterodyne ... See more keywords
Ultra-low sampling resolution technique for heterodyne phase-OTDR based distributed acoustic sensing.
Sign Up to like & getrecommendations! Published in 2022 at "Optics letters"
DOI: 10.1364/ol.456925
Abstract: Phase-sensitive optical time-domain reflectometry (Φ-OTDR) based on heterodyne detection is widely used for its simple structure and high signal-to-noise ratio (SNR). However, the large amount of raw data of Φ-OTDR places a heavy burden on… read more here.
Keywords: heterodyne; sampling resolution; phase; low sampling ... See more keywords