Nonlinear Optical Behaviour of Polydiacetylene Coated Glass Waveguides

Abstract

Optical waveguiding in dielectric planar ion-exchanged glass waveguides coated with nonlinear polydiacetylenes is studied. Two polydiacetylenes were used in order to measure intensity-dependent guided waves, but a nonlinear optical response can only be seen for one, namely p-3BCMU. For the TM2-mode the real part of the third-order nonlinear susceptibility of p-3BCMU is determined to be Rex ⁽³⁾ = -3.10⁻¹⁹ m²/V² at 1.064 μm using both shift in modenumber and nonlinear coupling.

Key Words:

• Glass waveguides
• optical waveguiding
• coatings
• polydiacetylenes
• nonlinear behaviour