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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

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Silicon based polarization insensitive filter for WDM-PDM signal processing.

Yaguang Qin, Yu Yu, Jinghui Zou

|November 13, 2013

Summary

This summary is machine-generated.

We developed a novel optical circuit using two 2D grating couplers and a microring resonator for polarization-insensitive filtering. This circuit successfully demodulated wavelength and polarization division multiplexing signals with error-free operation.

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Area of Science:

Photonics and Optical Engineering
Integrated Optics
Signal Processing

Background:

Developing polarization-insensitive optical filters is crucial for advanced communication systems.
Existing solutions often face challenges with complexity and performance.
Microring resonators (MRRs) offer compact and tunable filtering capabilities.

Purpose of the Study:

To propose and fabricate a novel optical circuit combining two 2D grating couplers and an MRR.
To achieve polarization-insensitive filtering for optical signals.
To demonstrate the circuit's effectiveness in demodulating wavelength division and polarization division multiplexing (WDM-PDM) signals.

Main Methods:

Integration of two 2D grating couplers with a single microring resonator (MRR).
Utilizing the 2D grating couplers for signal splitting and combining based on polarization states.
Co-propagation of orthogonally polarized signals through a shared MRR.
Demonstration using non-return-to-zero differential-phase-shift-keying (NRZ-DPSK) signals.

Main Results:

The fabricated circuit exhibited polarization-insensitive filtering characteristics.
Successful demodulation of WDM-PDM NRZ-DPSK signals was achieved.
Bit error ratio (BER) measurements confirmed error-free operation, indicating high performance.

Conclusions:

The proposed novel circuit effectively functions as a polarization-insensitive filter.
The integrated design demonstrates practical applicability for advanced optical communication systems.
The error-free performance highlights the potential of this approach for high-speed data transmission.