Detuning effects in Brillouin ring microresonator laser.

Area of Science:

• Optics and Photonics
• Integrated Photonics
• Nonlinear Optics

Background:

• Brillouin lasers offer unique properties for various applications.
• Integrating Brillouin lasers onto microcavity platforms presents performance challenges.
• Understanding nonlinear interactions in microresonators is crucial for device development.

Purpose of the Study:

• To develop a theoretical framework for Brillouin lasing in integrated ring microcavities.
• To analyze the impact of mismatched Brillouin shift and microresonator inter-mode spacing.
• To identify optimal conditions for enhanced laser power and reduced noise in integrated Brillouin lasers.

Main Methods:

• Theoretical modeling of Brillouin lasing in ring microcavities.
• Analysis of frequency detuning effects on lasing threshold and power.
• Steady-state analytical approach validated by numerical simulations.

Main Results:

• Lasing threshold increases with pump frequency detuning.
• Significant laser power enhancement is achievable compared to pure resonant interaction.
• An optimal pump frequency detuning exists for maximal Brillouin signal and minimal noise.
• Increased detuning narrows the pump frequency range for lasing.

Conclusions:

• A theoretical framework successfully describes Brillouin lasing in integrated microcavities.
• Optimizing pump frequency detuning is key to enhancing power and reducing noise.
• This work provides a pathway for high-performance integrated Brillouin laser systems.