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Standing Waves in a Cavity

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:

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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

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Phase-mismatched localized fields in A-PPLN waveguide devices.

Derek Chang, Yu-Wei Lin, Carsten Langrock

|January 15, 2016

Summary

This summary is machine-generated.

We developed a method to control unwanted localized optical fields in nonlinear optics. Our technique reduces these fields by 90% in quasi-phase-matched devices.

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Area of Science:

Nonlinear optics
Quantum optics
Materials science

Background:

Highly phase-mismatched nonlinear interactions can generate undesirable spatially localized optical fields.
These localized fields can negatively impact the performance of nonlinear optical devices.

Purpose of the Study:

To theoretically describe the generation of spatially localized optical fields by ultrafast pulses.
To investigate methods for suppressing these localized fields while preserving nonlinear device performance.

Main Methods:

Theoretical modeling of localized optical field generation.
Analysis of temporal walk-off and pump depletion effects.
Experimental validation using quasi-phase-matched (QPM) aperiodically poled lithium niobate (A-PPLN) waveguides.

Main Results:

A theoretical model for generating spatially localized optical fields was developed.
The spatial profile of the localized field was measured in an A-PPLN waveguide.
Aperiodically poled lithium niobate devices with a 33% duty cycle reduced the localized field by 90%.

Conclusions:

Spatially localized optical fields can be effectively suppressed.
Aperiodically poled lithium niobate devices with optimized duty cycles offer improved performance for nonlinear optical applications.