Optical modulator control system for interconnecting transceivers

By combining a CMOS TRX engine and a dual-state switch, the control process of the optical modulator is simplified, solving the control problem of existing micro-ring resonator-based optical modulators when temperature and laser power change. This achieves low-cost, high-efficiency modulator control, suitable for various modulation formats and environmental conditions.

CN115698803BActive Publication Date: 2026-06-12HUAWEI TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUAWEI TECH CO LTD
Filing Date
2021-06-21
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

In the existing technology, optical modulator control systems based on microring resonators face the challenge of efficient and reliable control, especially in maintaining the optimal operating point when temperature, laser power and wavelength change. Moreover, existing control schemes are complex and costly, and are difficult to extend to different modulation formats.

⚗Method used

The system combines a CMOS TRX engine with a dual-state switch. The CMOS TRX engine is used to acquire and monitor optical transmitter parameters, while the dual-state switch guides the output of the photodetector to the transceiver engine or controller in different states, simplifying the controller initialization process and reducing reliance on additional circuitry.

🎯Benefits of technology

It achieves efficient and low-cost optical modulator control under different modulation formats and environmental changes, simplifies controller design, reduces hardware and software complexity, and improves system flexibility and scalability.

✦ Generated by Eureka AI based on patent content.

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Abstract

An interconnect transceiver for transmitting and receiving optical signals is proposed, comprising an electronic module with a transceiver engine and a photonic module with a laser source, a modulator, a photodetector for monitoring the laser, a photodetector for receiving external optical signals, a controller for operating the laser source and the laser source modulator, and an electronic switch with two states. The first state allows the transceiver engine to monitor the modulated laser source in order to gather a reference set of operating parameters, the second state is one in which the signal from the modulated laser source is directed to the controller, allowing for example the controller to control the transmitting laser source and modulator in real time.
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