Electro-optic comb based real time ultra-high sensitivity phase noise measurement system for high frequency microwaves

Abstract Recent progress in ultra low phase noise microwave generation indispensably depends on ultra low phase noise characterization systems. However, achieving high sensitivity currently relies on time consuming averaging via cross correlation, which sometimes even underestimates phase noise beca...

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Autores principales:	N. Kuse, M. E. Fermann
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/74efb4790bf1482b99ef3bc2900ffaa3
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id	oai:doaj.org-article:74efb4790bf1482b99ef3bc2900ffaa3
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spelling	oai:doaj.org-article:74efb4790bf1482b99ef3bc2900ffaa32021-12-02T12:30:51ZElectro-optic comb based real time ultra-high sensitivity phase noise measurement system for high frequency microwaves10.1038/s41598-017-03049-52045-2322https://doaj.org/article/74efb4790bf1482b99ef3bc2900ffaa32017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03049-5https://doaj.org/toc/2045-2322Abstract Recent progress in ultra low phase noise microwave generation indispensably depends on ultra low phase noise characterization systems. However, achieving high sensitivity currently relies on time consuming averaging via cross correlation, which sometimes even underestimates phase noise because of residual correlations. Moreover, extending high sensitivity phase noise measurements to microwaves beyond 10 GHz is very difficult because of the lack of suitable high frequency microwave components. In this work, we introduce a delayed self-heterodyne method in conjunction with sensitivity enhancement via the use of higher order comb modes from an electro-optic comb for ultra-high sensitivity phase noise measurements. The method obviates the need for any high frequency RF components and has a frequency measurement range limited only by the bandwidth (100 GHz) of current electro-optic modulators. The estimated noise floor is as low as −133 dBc/Hz, −155 dBc/Hz, −170 dBc/Hz and −171 dBc/Hz without cross correlation at 1 kHz, 10 kHz, 100 kHz and 1 MHz Fourier offset frequency for a 10 GHz carrier, respectively. Moreover, since no cross correlation is necessary, RF oscillator phase noise can be directly suppressed via feedback up to 100 kHz frequency offset.N. KuseM. E. FermannNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q N. Kuse M. E. Fermann Electro-optic comb based real time ultra-high sensitivity phase noise measurement system for high frequency microwaves
description	Abstract Recent progress in ultra low phase noise microwave generation indispensably depends on ultra low phase noise characterization systems. However, achieving high sensitivity currently relies on time consuming averaging via cross correlation, which sometimes even underestimates phase noise because of residual correlations. Moreover, extending high sensitivity phase noise measurements to microwaves beyond 10 GHz is very difficult because of the lack of suitable high frequency microwave components. In this work, we introduce a delayed self-heterodyne method in conjunction with sensitivity enhancement via the use of higher order comb modes from an electro-optic comb for ultra-high sensitivity phase noise measurements. The method obviates the need for any high frequency RF components and has a frequency measurement range limited only by the bandwidth (100 GHz) of current electro-optic modulators. The estimated noise floor is as low as −133 dBc/Hz, −155 dBc/Hz, −170 dBc/Hz and −171 dBc/Hz without cross correlation at 1 kHz, 10 kHz, 100 kHz and 1 MHz Fourier offset frequency for a 10 GHz carrier, respectively. Moreover, since no cross correlation is necessary, RF oscillator phase noise can be directly suppressed via feedback up to 100 kHz frequency offset.
format	article
author	N. Kuse M. E. Fermann
author_facet	N. Kuse M. E. Fermann
author_sort	N. Kuse
title	Electro-optic comb based real time ultra-high sensitivity phase noise measurement system for high frequency microwaves
title_short	Electro-optic comb based real time ultra-high sensitivity phase noise measurement system for high frequency microwaves
title_full	Electro-optic comb based real time ultra-high sensitivity phase noise measurement system for high frequency microwaves
title_fullStr	Electro-optic comb based real time ultra-high sensitivity phase noise measurement system for high frequency microwaves
title_full_unstemmed	Electro-optic comb based real time ultra-high sensitivity phase noise measurement system for high frequency microwaves
title_sort	electro-optic comb based real time ultra-high sensitivity phase noise measurement system for high frequency microwaves
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/74efb4790bf1482b99ef3bc2900ffaa3
work_keys_str_mv	AT nkuse electroopticcombbasedrealtimeultrahighsensitivityphasenoisemeasurementsystemforhighfrequencymicrowaves AT mefermann electroopticcombbasedrealtimeultrahighsensitivityphasenoisemeasurementsystemforhighfrequencymicrowaves
_version_	1718394286043561984

Electro-optic comb based real time ultra-high sensitivity phase noise measurement system for high frequency microwaves

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