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FiberWelcome to Thorlabs; below you will find links to 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 cords as standard stock items. In addition, custom fiber patch cords can be ordered and shipped within 24 hours. Our fiber products are supported by a specialized line of optomechanical components and fiber components. Fiber components is a large category that includes collimators, polarization controllers, couplers, WDMs, circulators, attenuators, and all of the tools and supplies needed to connectorize, inspect, and clean 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.