OPTICAL FIBER ASSEMBLY WITH ENHANCED FILTERING OF HIGHER-ORDER MODES

摘要

Optical fiber assemblies for filtering of higher-order modes are provided andinclude awinding support and an optical fiber wound along a winding path on the windingsupport.The optical fiber is configured to support a fundamental transverse mode andone or morehigher-order transverse modes. The optical fiber has a longitudinal fiberaxis, a core, acladding surrounding the core, a transverse cross-section lacking circularsymmetry, anda rotation imparted thereto about the longitudinal fiber axis. The rotationand winding ofthe optical fiber provide stronger attenuation of the one or more higher-ordertransversemodes as compared to the fundamental transverse mode. In some implementations,thewinding path has a non-constant radius of curvature. In other implementations,the opticalfiber has a diameter larger than 10 micrometers and at least one stress-applying partarranged in the cladding about the core. Methods for higher-order-modefiltering are alsoprovided.