We present a new noninvasive technique for measuring the spatial variation of the zero-dispersion wavelength (λ<sub>0</sub>) in single-mode fibers. This technique uses low-power continuous-wave lasers and is simple to implement. When applying this technique to dispersion-shifted fibers, we can resolve subnanometer fluctuations in λ<sub>0</sub> with a potential spatial resolution of better than 100 m. We also discuss and show the limits of this and other techniques that arise from polarization-mode dispersion in the fibers.
© 1998 Optical Society of America
I. Brener, P. P. Mitra, D. D. Lee, D. J. Thomson, and D. L. Philen, "High-resolution zero-dispersion wavelength mapping in single-mode fiber," Opt. Lett. 23, 1520-1522 (1998)