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Related Experiment Video

Updated: Jun 2, 2025

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

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Automated tuning of a ring-assisted MZI-based interleaver for Kerr frequency combs.

Songli Wang, Yuyang Wang, Swarnava Sanyal

|January 16, 2025

Summary

This summary is machine-generated.

We developed a compact silicon photonic interleaver using a ring-assisted Mach-Zehnder interferometer (RAMZI) with a 400 GHz free spectral range. This device offers automated compensation for fabrication errors and precise passband shaping for improved optical networking.

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Area of Science:

Photonics
Optical Engineering
Integrated Optics

Background:

Advanced optical communication systems require efficient wavelength multiplexing and demultiplexing components.
Silicon photonics offers a scalable platform for integrated optical devices.
Existing interleaving technologies face challenges in fabrication tolerance and precise spectral control.

Purpose of the Study:

To demonstrate a compact silicon photonic interleaver based on a ring-assisted Mach-Zehnder interferometer (RAMZI).
To introduce a novel add-on structure and tuning method for automated compensation of fabrication imperfections and precise passband shaping.
To achieve precise alignment with Kerr comb lines for advanced optical signal processing.

Main Methods:

Design and fabrication of a compact RAMZI-based silicon photonic interleaver.
Development of a novel add-on structure for automated tuning and compensation.
Characterization of the interleaver's performance with distributed-feedback (DFB) lasers and a Kerr comb.

Main Results:

Demonstrated a 400 GHz free spectral range (FSR) RAMZI interleaver with flat passbands over 50 nm.
Achieved automated compensation for fabrication imperfections and precise shaping of flat-top passbands.
Successfully interleaved eight channels of DFB lasers and a 200 GHz Kerr comb with ~20 dB extinction ratio.

Conclusions:

The developed RAMZI interleaver offers a compact and high-performance solution for optical wavelength management.
The novel add-on structure and tuning method enable robust and precise control over interleaver characteristics.
This technology holds promise for next-generation optical communication networks and signal processing applications.