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Low-loss ultracompact optical power splitter using a multistep structure.

Zhe Huang¹, Hau Ping Chan, Mohammad Afsar Uddin

¹Department of Electronic Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong, China.

|April 2, 2010

Summary

This summary is machine-generated.

We developed an ultracompact, low-loss optical power splitter for broadband passive optical networks. This innovative device achieves minimal signal degradation across various wavelengths and polarizations, enabling efficient network expansion.

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Area of Science:

Photonics
Optical Engineering
Telecommunications

Background:

Passive optical networks (PONs) are crucial for broadband internet delivery.
Efficient optical power splitting is essential for scaling PON infrastructure.
Existing splitters often face limitations in loss, size, or manufacturing cost.

Purpose of the Study:

To design and evaluate a novel ultracompact optical power splitter.
To minimize insertion loss and polarization-dependent loss for broadband applications.
To assess the feasibility of mass production using cost-effective methods.

Main Methods:

A multistep, two-material (core/cladding) design was conceptualized.
Three-dimensional finite-difference beam propagation method (3D-FDBPM) was employed for performance evaluation.
Simulations covered performance across O to L bands, including wavelength and polarization dependence.

Main Results:

Achieved an ultralow excess loss of 0.4 dB at a 24-degree branching angle.
Demonstrated minimal wavelength-dependent loss (<0.3 dB) and polarization-dependent loss (<0.05 dB) across O to L bands.
The design is suitable for broadband passive optical network applications.

Conclusions:

The proposed optical power splitter offers superior performance in terms of loss and compactness.
The design is compatible with low-cost polymer-based embossing techniques for mass production.
This advancement holds significant potential for enhancing the efficiency and cost-effectiveness of passive optical networks.