We demonstrate the generation of symmetrical supercontinuum of over 40 nm in the 1.55 m region (1540 - 1580 nm) by injecting 1562 nm, 2.2 ps, 40 GHz optical pulses into a 200 m-long, dispersion-flattened polarization-maintaining photonic crystal fiber. The chromatic dispersion and dispersion slope of the fiber at 1.55 m are -0.23 ps/km/nm and 0.01 ps/km/nm2, respectively. This is the first report of 1.55 m band supercontinuum generation in a dispersion-flattened and polarization-maintaining photonic crystal fiber.

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We propose a novel fiber optic sensor for inspecting cleaved optical fiber ends based on Fabry–Perot interferometer.The sensor uses mainly laser diodes, an optical power meter, 3‐dB coupler, and XY lateral adjustment fiber stage. Experimentally obtained fiber end images were in good agreement with scanning electron microscope observation images. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1541–1543, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26829

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