Injection locking of photonic paint

Area of Science:

• Optics and Photonics
• Laser Physics
• Materials Science

Background:

• Scattering gain media offer unique light-matter interaction properties.
• Conventional lasers utilize injection seeding for single-mode oscillation.
• Controlling emission bandwidth in scattering gain systems is challenging.

Purpose of the Study:

• To investigate the effect of seed injection on the emission bandwidth of scattering gain media.
• To achieve narrow-linewidth laser emission and spectral collapse.
• To develop a theoretical framework for understanding the seeding mechanism.

Main Methods:

• Utilizing an injection seeding technique with a scattering gain medium.
• Analyzing emission spectra to observe bandwidth changes.
• Measuring peak intensity enhancement and spectral collapse.
• Developing and presenting a theoretical model.

Main Results:

• Achieved significant narrowing of the emission bandwidth through seed injection.
• Observed complete spectral collapse at wavelengths other than the seed.
• Reported a substantial enhancement of the isotropic emission peak intensity.
• Presented a theory explaining the observed emission characteristics.

Conclusions:

• Injection seeding is an effective method to control and narrow the emission bandwidth of scattering gain media.
• The technique leads to spectral collapse and enhanced emission intensity.
• The developed theory accurately describes the experimental observations and predicts the required seed energy for locking.