High-volume series production of top-quality FBG arrays — ranging from single FBGs to thousands of FBGs per fiber. Custom fibers are available, including bend-insensitive, pure silica core, radiation-hard, reduced-cladding, and more. Features include ultra-high strength (5–6% strain), exceptionally low insertion loss (<0.01 dB), and minimal polarization-dependent wavelength shift (<5 pm).