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Silicon optical filter with multiple semi-rings.

Jing Wan, Jiangyun Miao, Jinwen You

|August 5, 2020

Summary

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We developed a new silicon optical filter using multiple semi-rings for adjustable optical filtering. This compact design offers superior performance compared to traditional filters, enabling flexible application tuning.

Area of Science:

Photonics and Optical Engineering
Materials Science

Background:

Traditional optical filters often lack adjustability and compactness.
Integrated silicon photonics offers a platform for novel optical device development.

Purpose of the Study:

To propose and characterize a novel silicon optical filter based on multiple semi-rings.
To demonstrate the adjustability and performance advantages of the proposed filter design.

Main Methods:

Fabrication of a silicon optical filter using multiple semi-ring structures.
Characterization of optical filtering properties, including 3 dB bandwidth, free spectral range, and finesse.
Comparative analysis against traditional Mach-Zehnder-interferometer-based optical filters.

Main Results:

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The proposed optical filter exhibits a 3 dB bandwidth of 2.52 nm, a free spectral range of 11.33 nm, and a finesse of 4.50.
The filter's properties are flexibly adjustable by altering the number and spacing of semi-rings.
The silicon semi-ring filter demonstrates superior performance compared to traditional Mach-Zehnder-interferometer filters.

Conclusions:

The multiple semi-ring silicon optical filter provides a new, adjustable, and compact solution for optical filtering.
This design offers enhanced performance and flexibility for diverse optical applications.
The study presents a novel method for developing high-performance, tunable optical filters.