Optical limiting and spectral stabilization in segmented photonic lattices

Area of Science:

• Photonics
• Nonlinear Optics
• Materials Science

Background:

• Optical limiters are crucial for protecting sensitive equipment from high-intensity laser light.
• Existing optical limiter technologies often suffer from spectral distortions and limited scalability.
• Photonic lattices offer novel light manipulation capabilities for advanced optical devices.

Purpose of the Study:

• To propose and experimentally demonstrate a novel integrated optical limiter based on photonic lattices.
• To investigate the nonlinear transmission characteristics of the proposed device.
• To evaluate the reduction of nonlinear spectral distortions in the device.

Main Methods:

• Fabrication of a waveguide lattice in bulk fused silica using femtosecond laser writing.
• Characterization of the device's optical transmission under varying input power levels.
• Analysis of spectral properties to quantify nonlinear spectral distortions.

Main Results:

• Achieved unity transmission in the linear regime, transitioning to power-dependent transmission decrease.
• Demonstrated significant reduction in nonlinear spectral distortions due to diffractive propagation.
• Successfully implemented the optical limiter functionality in an experimental waveguide lattice.

Conclusions:

• Photonic lattices with segmentation-based self-imaging are effective integrated optical limiters.
• The proposed device offers superior performance with reduced spectral distortions compared to conventional methods.
• This technology holds promise for advanced optical protection and signal processing applications.