As part of Select-Cut-Off and polarization maintaining singlemode fibers, these offer a wide wavelength range from UV to IR, and are widely used in current and future applications like data transmission, optical communications, sensorics and high-power laser transmission. Promises impressive stability, industry-rated tolerances and reliable geometrical specifications. The company also offers customized fibers, especially when it comes to adjusting the wavelengths from UV to IR and mode field diameters depending on operating wavelength. Doping concentrations or special refractive index profiles are used to adjust the numerical aperture. The fibers themselves are coated with acrylate or dual acrylate, polyimide or high-temperature acrylate coatings. The reduced jacket-geometry or adjusted dispersion suit challenging applications.