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Updated: Apr 30, 2026

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
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High-speed fiber-optic bolometry enabled by deconvolution signal processing.

Xiaoli Wang1, Babak Moeinimaleki1, Ayush Chinmay1

  • 1Department of Electrical and Computer Engineering, Michigan State University, East Lansing, Michigan 48824, USA.

The Review of Scientific Instruments
|April 29, 2026
PubMed
Summary
This summary is machine-generated.

Fiber-optic bolometers (FOBs) now offer high-speed radiation measurements for fusion plasma diagnostics. A new deconvolution method improves temporal resolution, enabling the study of rapid radiation transients.

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Area of Science:

  • Plasma Physics
  • Fusion Energy
  • Diagnostic Techniques

Background:

  • High temporal resolution measurements are critical for fusion plasma diagnostics.
  • Fiber-optic bolometers (FOBs) have advantages but are limited by heat diffusion for direct power reconstruction.
  • Existing methods struggle with millisecond-scale phenomena.

Purpose of the Study:

  • To develop an advanced signal processing approach for FOBs.
  • To improve the temporal resolution of radiated power measurements in fusion plasmas.
  • To enable the study of rapid radiation transients.

Main Methods:

  • Developed a deconvolution-based numerical signal processing approach.
  • Modeled the FOB as a linear time-invariant system.
  • Inverted the system impulse response to recover incident radiation power.

Main Results:

  • Achieved over two orders-of-magnitude improvement in temporal resolution.
  • Successfully reconstructed radiation pulses as narrow as 250 μs.
  • Demonstrated a significant advancement over millisecond-scale impulse excitation methods.

Conclusions:

  • FOBs combined with deconvolution processing are a promising tool for fusion plasma diagnostics.
  • The new method enables the resolution of rapid radiation transients.
  • This advancement is crucial for understanding fast plasma phenomena.