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Fast optical switching in nonlinear prism couplers.

J Fick, G Vitrant

|October 29, 2009

Summary

Short optical pulses are efficiently coupled into waveguides using prism couplers. This enables fast nonlinear optical effects due to matched group velocities, outperforming traditional waveguide coupler response times.

Area of Science:

Optics and Photonics
Waveguide Technology
Nonlinear Optics

Background:

Prism couplers are used for exciting optical pulses in waveguides.
Understanding the dynamic excitation process is crucial for efficient light manipulation.

Purpose of the Study:

To investigate the excitation process of short optical pulses in waveguides using prism couplers.
To analyze the efficiency and dynamic behavior of this coupling method.

Main Methods:

A fully dynamic model was employed to simulate the excitation process.
Analysis focused on coupling efficiency and response times for short optical pulses.

Main Results:

High coupling efficiency was achieved even for very short optical pulses.

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Fast nonlinear behaviors, including power limiting and optical switching, were predicted.

The predicted response times were significantly shorter than the waveguide coupler's buildup time.

Conclusions:

Group-velocity matching between guided and pump fields is key to achieving fast nonlinear optical responses.
Prism couplers offer a promising method for efficient excitation of short optical pulses in waveguides for advanced photonic applications.