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Optical FiberWelcome to Thorlabs; below you will find links to optical fiber and fiber optic components, a subset of our entire line of photonics products. Thorlabs offers an industry-leading selection of bare optical fiber and fiber optic patch cables as standard stock items. In addition, custom fiber patch cables can be ordered and shipped within 24 hours. Also available is an extensive line of fiber components including collimators, polarization controllers, fiber optic couplers, WDMs, circulators, attenuators, and all of the tools and supplies needed to terminate, inspect, and clean optical fiber and fiber components. The Test & Measurement category includes the rack-based lasers, TEC controllers, and current controllers that are frequently used in fiber-based experiments and test systems. In addition, optical switches, modulators, and polarization control and measurement systems are found in the Test & Measurement category.