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High-resolution Fiber-optic Microendoscopy for in situ Cellular Imaging

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Published on: January 11, 2011

High-performance chalcogenide fiber bundle for mid-wave infrared imaging.

Yu Qiu, Sisheng Qi, Lei Li

|January 29, 2025

Summary

Flexible infrared image fiber bundles deliver thermal images for challenging applications. This study optimized chalcogenide fiber design for high transmittance and resolution, enabling advanced thermal imaging systems.

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Last Updated: Jul 18, 2026

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In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation

In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation

Published on: May 27, 2013

Area of Science:

Optics and Photonics
Materials Science
Infrared Technology

Background:

Flexible infrared fiber bundles (FBs) enable compact thermal imaging for difficult-to-access areas.
High overall transmittance (OT) and spatial resolution (R) are crucial for FB performance.
Fabricating high-performance FBs remains a significant challenge.

Purpose of the Study:

To demonstrate a novel design for flexible mid-wave infrared chalcogenide FBs.
To achieve high OT and decent R through optimized cladding composition and fiber geometry.
To comprehensively characterize the thermal image delivery performance of the fabricated FB.

Main Methods:

Optimized glass cladding composition and geometric parameters of single fibers.
Fabricated FB using a modified stack-and-draw technique combined with layer-stacking.
Characterized thermal image delivery performance, including OT, loss, and spatial resolution.

Main Results:

Developed a flexible FB with an As40S60 core and As38.9S61.1 cladding, featuring a core diameter of ~22.8 µm and a core/cladding ratio of 0.8.
Achieved an OT of 40.5%, a single-fiber loss of 1.71 dB/m at 4.6 µm, and a spatial resolution of 20.2 lp/mm.
The 52 cm long FB with a ~50.2% filling factor demonstrated excellent thermal image delivery.

Conclusions:

Optimized fiber design balances light leakage reduction and filling factor for high-performance FBs.
The fabricated chalcogenide FB offers superior performance compared to previously reported FBs.
Findings provide insights for developing practical, high-performance thermal imaging FBs.