Coherent introduces a single-mode (SM2000D) fiber and a polarization maintaining (PM2000D) fiber designed for dispersion compensation in the 2 µm wavelength range. The core composition, (main driver for the material dispersion) and the waveguide design (driver for the waveguide dispersion) of both fibers were specifically tailored to enable the total dispersion to be negative around 2 µm. Both fibers are designed with a core diameter of ~ 2 µm, an NA of ~ 0.4 and a mode-field diameter of 3.8 µm at 2 µm. The 125 µm cladding diameter allows for high compatibility with active and passive fibers used in pre-amplifier stage(s) of ultrafast lasers and easy handling with conventional cleaving and splicing equipment. The dispersion tailored fiber is also available in polarization maintaining design (PM2000D ), suitable for 2 µm PM lasers and amplifier systems.

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