Fiber ring resonator with power exchange between polarization modes: experiment

Area of Science:

• Photonics and Optical Engineering
• Fiber Optic Sensors
• Resonator Technology

Background:

• Fiber ring resonators are crucial optical components.
• Thermal stability and fringe modulation depth are key performance metrics.
• Existing designs face limitations in stability and modulation.

Purpose of the Study:

• To develop a novel fiber ring resonator with enhanced thermal stability.
• To improve fringe modulation depth and achieve simultaneous resonant peak and dip outputs.
• To present a theoretical model validating experimental findings.

Main Methods:

• Fabrication of a fiber ring resonator using polarization-preserving fiber.
• Introduction of a splice within the fiber loop with crossed birefringent axes.
• Analysis of the output polarization state along the fiber's birefringent axes.

Main Results:

• Achieved significantly improved thermal stability.
• Obtained enhanced fringe modulation depth.
• Demonstrated simultaneous resonant peak and resonant dip output.
• Developed a theoretical model showing good agreement with experimental results.

Conclusions:

• The novel fiber ring resonator design offers superior thermal stability and modulation.
• The employed splicing technique and polarization analysis are effective for performance enhancement.
• The theoretical model provides a robust framework for understanding resonator behavior.