Chalcogenide glass fiber single-mode
The fiber is single-mode when the propagating light wavelength is longer than 6. Chalcogenide (ChG) glasses are well known for their unique characteristics in infrared (IR) and strong nonlinearities, endowing them as promising candidates for Mid-IR supercontinuum generation (SCG). Here, step-index As-S fiber with a small core was fabricated via twice-extrusion method. In this Letter, we report, to the best of our knowledge, the largest effective single-mode mid-infrared chalcogenide (ChG) fiber. 35 are chosen for constructing all-solid photonic crystal fiber (PCF) with two rings of "holey". Double-crucible, rod-in-tube and preform drawing techniques were applied for the preparation of different fiber structures based on arsenic sulfide. Because of the low crystallization tendency and the high mechanical and chemical stability, this glass is favored for passive and active fiber.
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