Ultrafast measurement of vector spatial modes by using two-dimensional linear optical sampling

Ultrafast measurement of vector spatial modes by using two-dimensional linear optical sampling

To the best of the authors' knowledge, we present the first-ever demonstration of the two-dimensional linear optical sampling of fiber spatial modes. The images of the fiber cross sections excited by the LP or LP modes are directly projected onto a two-dimensional photodetector array and cohere...

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Veröffentlicht in:Optics letters 2023-05, Vol.48 (10), p.2551-2554
Hauptverfasser: Okamura, Shuki, Osawa, Kyogo, Zhang, Chao, Ito, Fumihiko, Nakamura, Atsushi, Koshikiya, Yusuke
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Multiplexing
Sampling
Spatial distribution
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container_end_page 2554
container_issue 10
container_start_page 2551
container_title Optics letters
container_volume 48
creator Okamura, Shuki
Osawa, Kyogo
Zhang, Chao
Ito, Fumihiko
Nakamura, Atsushi
Koshikiya, Yusuke
description To the best of the authors' knowledge, we present the first-ever demonstration of the two-dimensional linear optical sampling of fiber spatial modes. The images of the fiber cross sections excited by the LP or LP modes are directly projected onto a two-dimensional photodetector array and coherently sampled by local pulses with a uniform spatial distribution. Consequently, the spatiotemporal complex amplitude of the fiber mode is observed with a time resolution of a few picoseconds by using electronics with a bandwidth of only a few MHz. Such ultrafast and direct observation of vector spatial modes enables the characterization of the space-division multiplexing fiber itself with high time accuracy and wide bandwidth.
doi_str_mv 10.1364/OL.490009
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source OSA_美国光学学会数据库1
subjects Multiplexing
Sampling
Spatial distribution
title Ultrafast measurement of vector spatial modes by using two-dimensional linear optical sampling
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