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Updated: Jul 15, 2026
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High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
Reconfigurable single-shot spectroscopy reaching 86 femtometers resolution
Tianwei Jiang1, Jie Li2, Lu Chen2
1State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, China. jtw@bupt.edu.cn.
Nature Communications
|July 13, 2026
Summary
A new reconfigurable single-shot spectroscopy method overcomes limitations in spectral bandwidth, resolution, and speed. This breakthrough achieves record spectral resolution, enabling detailed analysis of rapid transient events.
Area of Science:
- Optical Spectroscopy
- Photonics
- Instrumentation
Background:
- Single-shot spectroscopy captures transient events but faces trade-offs between spectral bandwidth, resolution, and acquisition speed.
- Existing systems limit versatility and adoption due to inherent incompatibilities in performance parameters.
Purpose of the Study:
- To introduce a reconfigurable single-shot spectroscopy method with programmable control over spectral bandwidth, resolution, and acquisition speed.
- To overcome the traditional limitations in spectral resolution and enhance the versatility of single-shot spectroscopic techniques.
Main Methods:
- Developed a reconfigurable single-shot spectroscopy system offering full programmability.
- Demonstrated programmable navigation of the spectral bandwidth, resolution, and acquisition speed trade-off.
- Achieved a record spectral resolution of 86 femtometers in the 1.5 μm band.
Main Results:
- Successfully captured rapid dynamic spectral fluctuations of phase-shift fiber Bragg gratings.
- Recorded responses to both continuous (9 kHz) and sudden (0.1 ms) vibrations.
- Achieved spectral resolution comparable to state-of-the-art Fourier transform spectrometers.
Conclusions:
- The reconfigurable single-shot spectroscopy method broadens the application landscape for analyzing rapid, non-repetitive processes.
- This innovation paves the way for the commercialization of advanced single-shot spectroscopy.
- Enables precise measurement of dynamic spectral changes in optical devices.
