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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

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Published on: November 30, 2012

Parametric amplification in lossy nonlinear waveguides with spatially dependent coupling.

Vitor Ribeiro, Auro M Perego

|October 12, 2022

Summary

We explored optical parametric amplification in coupled waveguides, finding that spatially dependent coupling overcomes pump depletion. This novel approach enhances amplifier performance, offering better bandwidth and gain products than single waveguides.

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Area of Science:

Nonlinear Optics
Integrated Photonics
Waveguide Optics

Background:

Optical parametric amplification (OPA) is crucial for generating light at new frequencies.
Standard OPA in single waveguides suffers from performance limitations due to pump attenuation.
Coupled waveguide systems offer potential for enhanced nonlinear optical processes.

Purpose of the Study:

To investigate optical parametric amplification in coupled waveguide amplifiers.
To analyze the impact of losses and spatially dependent coupling on OPA performance.
To demonstrate improved bandwidth and bandwidth-gain product using dynamic coupling compensation.

Main Methods:

Analytical modeling of coupled waveguide amplifiers.
Numerical simulations to study OPA dynamics.
Analysis of spatially dependent coupling effects on pump depletion and signal gain.
Comparison with standard single-waveguide amplifier designs.

Main Results:

Spatially dependent coupling effectively compensates for pump attenuation.
Achieved superior bandwidth and bandwidth-gain product compared to single-waveguide amplifiers.
Demonstrated the feasibility of dynamic mismatch compensation in OPA.

Conclusions:

Coupled waveguide amplifiers with spatially dependent coupling represent a novel class of devices.
This approach offers significant performance improvements for optical parametric amplification.
Highly relevant for the development of integrated silicon nitride photonic devices.