Abstract

Thermal poling, first demonstrated in hulk silica- glass,¹ is a well established technique for creating a second order optical nonlinearity (χ⁽²⁾) in centro-symmetric materials. Soon after the first demonstration in bulk glass, a χ⁽²⁾ in thermally poled germano-silicate fibre was reported.² Despite the relatively low χ⁽²⁾ of 1 pm/V poled fibres represent an extremely attractive nonlinear medium, offering major advantages over more established crystalline materials in terms of waveguide length, damage threshold, loss and fabrication cost.

© 2001 Optical Society of America