Abstract

A piece of domestic polarization-maintaining photonic crystal fiber (PM-PCF, 964 m in length) is made into a fiber coil, and its polarization extinction ratio (PER) is measured in a temperature range of -45-80 °C before and after PM-PCF is wound and solidified. A fiber coil made of commercial panda PM fiber (PMF) is also fabricated and measured for comparison. Our experiments show that the PER variation of the PM-PCF coil (2.25 dB) is far smaller than that of the panda PMF coil (10 dB) in the whole temperature range because PM-PCF is intrinsically insensitive to the temperature variation and stress in the fiber coil induced by the winding and solidification process. This characteristic is important for the real application of PM-PCFs in temperature-insensitive fiber interferometers, fiber sensors, and optical fiber gyroscopes.

© 2012 Chinese Optics Letters

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