Here you'll find Telecom SM Fibers. These application-specific fibers were optimized for use by component manufacturers in the telecommunications wavelengths and developed for pump diode pigtails, unique delivery for components & couplers.
Nufern visible wavelength fibers are optimized for use from 400 up to 900 nm. The high-performance fibers were developed for applications such as RGB components requiring generation of couplers, diode pigtails and unique delivery needs.
Here is Nufern's Singlemode Ultra-High NA Fibers. Excellent bridge fibers between high NA waveguides and low NA transmission fiber. Fibers include Select Cutoff SM Fiber 1, 3 & 4, Planar Waveguide SM Fiber, and 3/125 Select Cut-Off Fiber.