Ultralow-crosstalk and high-resolution integrated Echelle grating as interrogator for FBG sensing
Abstract
A silica-based planar echelle grating (PEG) with high resolution and ultra-low crosstalk is designed, fabricated, and characterized for an integrated spectrometer optimized for C-band operation. By leveraging mature silica waveguide fabrication technology and a large Rowland circle, the PEG exhibits both excellent robustness and superior optical performance. The experimental results demonstrate lowest on-chip loss of 0.9 dB across 14 output channels, with an average inter-channel crosstalk of -45 dB. The device further achieves a narrow 3-dB bandwidth of 0.24 nm, corresponding to a resolving power exceeding 6000, together with a highly accurate realization of the designed 1.5 nm channel spacing. These results highlight silica PEGs as robust, high-performance candidates for wavelength-division multiplexers in fiber-optic communication networks and as spectroscopy interrogators in fiber Bragg grating sensing systems for the precise determination of wavelength shifts.
Details
- Organisationseinheit(en)
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Angewandte Photonik - Optische Analytik, Sensorik und Spektroskopie
- Externe Organisation(en)
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Dalian University of Technology
Universität Potsdam
Eindhoven University of Technology (TU/e)
Beijing University of Posts and Telecommunications
- Typ
- Artikel
- Journal
- IEEE photonics technology letters
- Band
- 38
- Seiten
- 1106-1109
- Anzahl der Seiten
- 4
- ISSN
- 1041-1135
- Publikationsdatum
- 06.02.2026
- Publikationsstatus
- Elektronisch veröffentlicht (E-Pub)
- Peer-reviewed
- Ja
- ASJC Scopus Sachgebiete
- Elektronische, optische und magnetische Materialien, Atom- und Molekularphysik sowie Optik, Elektrotechnik und Elektronik
- Elektronische Version(en)
-
https://doi.org/10.1109/LPT.2026.3661841 (Zugang:
Geschlossen
)
