LIGHT BY LIGHT MODULATION AND SUBHARMONIC GENERATION IN SEMICONDUCTORDOPED GLASS N. I. ZHELUDEV, I. S. RUDDOCK et R. ILLINGWORTHJ. Phys. Colloques, 49 C2 (1988) C2-377-C2-380DOI: https://doi.org/10.1051/jphyscol:1988289