Keigo Matsuura and  Isao Tomita,  Spectral Broadening in an InGaAsP Optical Waveguide with χ(3) Nonlinearity Including Two Photon Absorption.   journal   = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    September 2014, vol. 94(10). 1292 - 1295
    [viewed 11 May 2024]. Available from: https://publications.waset.org/pdf/9999445.