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Low-chirp push-pull dual-ring modulator with 144 Gb/s PAM-4 data transmission
Optics Express
|September 10, 2020
Summary
We developed a novel dual-ring modulator for high-speed optical communication. This device significantly suppresses frequency chirp, enabling efficient 144 Gb/s data transmission over 1 km of fiber.
Area of Science:
- Photonics
- Optical Communications
- Integrated Optics
Background:
- High-speed optical modulators are crucial for modern data transmission.
- Frequency chirp in modulators limits data rates and transmission distances.
- Electromagnetically Induced Transparency (EIT) offers a route to low-chirp modulation.
Purpose of the Study:
- To experimentally demonstrate a low-chirp, high-speed push-pull dual-ring modulator.
- To characterize the static and dynamic performance of the modulator.
- To evaluate its suitability for high-data-rate transmission.
Main Methods:
- Fabrication of a push-pull dual-ring modulator with cascaded add-drop configurations.
- Utilizing differential drive signals to induce EIT-like resonance shifts.
- Performing static and dynamic characterization, including chirp parameter measurement.
- Conducting 144 Gb/s PAM-4 data transmission experiments over standard single-mode fiber.
Main Results:
- Successful demonstration of a low-chirp push-pull dual-ring modulator.
- Suppressed frequency chirp achieved through differential resonance shifting.
- Demonstrated 144 Gb/s PAM-4 transmission with Bit Error Rate (BER) below the Hard-Decision Forward Error Correction (HD-FEC) threshold.
- Successful transmission over 1 km of standard single-mode fiber (SSMF) with 7% overhead.
Conclusions:
- The developed dual-ring modulator effectively suppresses chirp for high-speed applications.
- This technology shows promise for next-generation optical communication systems.
- The device meets stringent performance requirements for advanced data transmission.
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