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Related Experiment Video

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High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

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Published on: September 22, 2017

Photonic bandgap fiber bundle spectrometer.

Qu Hang¹, Bora Ung, Imran Syed

¹Génie physique, Ecole Polytechnique de Montreal, C.P. 6079, succ.Centre-ville, Montréal, Quebec, Canada, H3C 3A7.

|September 8, 2010

Summary

We developed an all-fiber spectrometer using photonic bandgap (PBG) fiber bundles and a CCD camera. This novel system enables accurate spectral reconstruction and shows potential for industrial-scale fabrication of fiber spectrometers.

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Area of Science:

Optics and Photonics
Spectroscopy
Materials Science

Background:

Traditional spectrometers are often bulky and expensive.
Integrating spectroscopic functionality into optical fibers offers miniaturization and cost reduction potential.
Photonic bandgap (PBG) fibers provide unique optical properties for spectral manipulation.

Purpose of the Study:

To experimentally demonstrate an all-fiber spectrometer.
To develop a method for reconstructing spectra from a single CCD image.
To assess the performance and fabrication scalability of the proposed system.

Main Methods:

Utilizing a fiber bundle composed of 100 Bragg fibers with complementary bandgaps.
Employing a monochrome CCD camera to capture binned images.
Developing a spectral reconstruction algorithm based on pseudoinversion of the spectrometer transmission matrix.

Main Results:

Demonstrated accurate reconstruction of peak center wavelengths within several percent of true values.
Achieved a spectroscopic resolution limit of approximately 30nm, with potential for sub-nanometer resolution.
Reported successful fabrication of PBG fiber bundles with hundreds of fibers using a two-stage drawing technique.

Conclusions:

The developed all-fiber spectrometer is a viable and promising technology.
The fabrication method using a two-stage drawing technique is suitable for industrial-scale production.
This approach offers a pathway towards compact, cost-effective, and high-performance fiber-based spectrometers.