Abstract

The free carrier dynamics and all-optical switching effects in a periodic waveguide were studied in a pump-probe arrangement. A Bragg reflector resonant with the TE₀ mode of the waveguide was fabricated to provide the periodicity of the structure. Two couplers were fabricated on either side of the Bragg grating to accommodate efficient coupling for a TM pump signal and TE probe signal. Nd:YAG pulsed and cw lasers at λ =1.064 μm are used as the pump and probe beams, respectively. The reflected signal from the TE₀ mode was monitored to study the nonlinear dynamical effects and the free carrier dynamics in the silicon-on-insulator structure. Measurements from Bragg reflectors ranging in periods from 0.16 to 0.1625 μm at various pulse energies will be presented.

© 1992 Optical Society of America