Time- and Wavelength-Division Multiplexed Heterodyne Detection Applied to FBG Interrogation

Time- and Wavelength-Division Multiplexed Heterodyne Detection Applied to FBG Interrogation

We report time- and wavelength-division multiplexing of fiber Bragg gratings interrogation based on heterodyne detection. A directly modulated distributed-feedback laser array is used as a multi-wavelength, frequency scanning, pulsed-light source. A heterodyne detection technique is used to increase...

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Veröffentlicht in:IEEE photonics technology letters 2024-03, Vol.36 (5), p.317-320
Hauptverfasser: Kuroda, Keiji, Matsumoto, Takahiro, Oka, Hisaki
Format: Artikel
Sprache:eng
Schlagworte:
Bragg gratings
Distributed feedback lasers
Frequency scanning
Interrogation
Laser arrays
Light sources
Signal to noise ratio
Wavelength division multiplexing
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Zusammenfassung:We report time- and wavelength-division multiplexing of fiber Bragg gratings interrogation based on heterodyne detection. A directly modulated distributed-feedback laser array is used as a multi-wavelength, frequency scanning, pulsed-light source. A heterodyne detection technique is used to increase the signal-to-noise ratio of weak reflections. Reflection spectra of 10 fiber Bragg gratings with three different wavelengths are simultaneously observed with high signal-to-noise ratios.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2024.3354892