Experimental observation of spectral transmittance of spun optical fiber

摘要

Spun optical fibers with different structure and different spinning rates are fabricated and their spectral transmittance is measured. It is found that the transmittance of spun stress-type fiber drops down in a certain long wavelength band as the spinning rate is increased, while this phenomenon is not found in the spun conventional fiber or un-spun stress-type fiber. We suggest it due to the micro-bending-loss induced by the spinning eccentricity of the fiber core.