All-solid all-chalcogenide microstructured optical fiber

Area of Science:

• Materials Science
• Optical Engineering
• Photonics

Background:

• Chalcogenide glasses offer unique optical properties for advanced fiber applications.
• Microstructured optical fibers (MOFs) enable novel light manipulation and confinement.
• Developing all-solid MOFs is crucial for robust and high-performance photonic devices.

Purpose of the Study:

• To realize and characterize an all-solid microstructured optical fiber using chalcogenide glasses.
• To investigate the optical guiding properties and loss mechanisms of the fabricated fiber.
• To assess the feasibility of using As2S3 inclusions in an As38Se62 glass matrix for MOF fabrication.

Main Methods:

• Fabrication of an all-solid microstructured optical fiber with As2S3 inclusions in an As38Se62 glass matrix.
• Theoretical analysis using the multipole method to demonstrate single-mode operation.
• Experimental verification of single-mode regime via near-field measurements.
• Optical transmission measurements to quantify signal loss.

Main Results:

• Successful fabrication of an all-solid MOF with distinct refractive indices (n=2.4 and n=2.8).
• Demonstration of single-mode guiding properties, confirmed by both theoretical calculations and experimental measurements.
• Observation of significant optical losses (6-7 dB/m) in the microstructured fiber.
• Identification of glass interface defects as the primary cause of excess optical loss.

Conclusions:

• An all-solid chalcogenide microstructured optical fiber capable of single-mode operation was successfully realized.
• The observed high optical losses are attributed to interfacial defects, not the fiber's microstructured geometry.
• Further research is needed to mitigate interface defects for improved performance of chalcogenide MOFs.