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- W3204258952 abstract "A distributed feedback (DFB) semiconductor laser self-injection locked to an optical waveguide ring resonator (OWRR) is used in a phase-sensitive optical time-domain reflectometry ( <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline> <mml:mi mathvariant=normal>Φ<!-- Φ --></mml:mi> </mml:math> -OTDR) vibration sensing system as its light source. A frequency-hopping-free period of more than 100 s is realized. A spatial resolution of 13 m at 4700 m and simultaneous measurement of two vibration sources are realized. The measurable vibration frequency is from 8 Hz to the upper limit of the sampling theorem. These satisfactory performances demonstrate that the DFB laser locked to an OWRR is not only cost effective, but also stable and reliable for <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline> <mml:mi mathvariant=normal>Φ<!-- Φ --></mml:mi> </mml:math> -OTDR sensing." @default.
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- W3204258952 date "2021-10-25" @default.
- W3204258952 modified "2023-09-26" @default.
- W3204258952 title "Using DFB laser self-injection locked to an optical waveguide ring resonator as a light source of Φ-OTDR" @default.
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- W3204258952 doi "https://doi.org/10.1364/ao.438572" @default.
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