Bending-loss studies of a single-mode triangular-index fiber with a depressed cladding ring with a vector-mode method

Area of Science:

• Optical Fiber Technology
• Photonics Engineering
• Materials Science

Background:

• Triangular-index fibers with depressed cladding rings offer unique properties.
• Controlling dispersion and bending loss is crucial for fiber optic performance.
• Existing fiber designs have limitations in balancing these characteristics.

Purpose of the Study:

• To investigate the bending-loss properties of triangular-index fibers with a depressed cladding ring.
• To identify optimal ring parameters for minimizing bending loss and achieving low dispersion.
• To compare proposed designs with established dispersion-shifted and dispersion-flattened fiber designs.

Main Methods:

• Utilizing the vector-mode power-series expansion method for field and dispersion calculations.
• Employing the volume-current method for predicting bending-loss.
• Numerical analysis of fiber designs with varying ring parameters.

Main Results:

• Near-optimal fiber designs were identified that exhibit low bending loss.
• These designs effectively achieve either dispersion-shifted or dispersion-flattened characteristics.
• The proposed designs show competitive or superior performance compared to existing fiber types.

Conclusions:

• Triangular-index fibers with depressed cladding rings are promising for advanced optical communication.
• Careful selection of ring parameters allows for tailored dispersion and low bending loss.
• The study provides valuable insights for the development of next-generation optical fibers.