Abstract

We present an experimental and numerical investigation of supercontinuum generation in polarization-maintaining highly nonlinear photonic crystal fiber using subnanosecond pulses of a passively $Q$-switched neodymium-doped yttrium aluminum garnet microlaser. For analysis of temporal and spectral characteristics, we performed spectrogram measurements using a streak camera. Supercontinuum spectrograms revealed the presence of cladding modes in our photonic crystal fiber and showed that part of the supercontinuum light was actually generated in the cladding modes. Moreover, numerical simulations indicated that distinct cladding modes can exhibit different dispersion, which adds more complexity to supercontinuum generation processes.

© 2018 Optical Society of America

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