研究目的
To design and implement a 12-channel VCSEL-based parallel optical module for very short reach (VSR) applications, addressing the limitations of traditional chip-chip connections such as crosstalk, high EMI, and poor signal quality.
研究成果
A 12-channel VCSEL voltage parallel driver circuit was successfully fabricated in a 0.18μm CMOS process, and a 12-channel optical transmission module was designed. The test results demonstrated an aggregate bandwidth of 120Gbps, meeting the system requirements for high-volume chip-to-chip VSR interconnection systems.
研究不足
The design and implementation are focused on very short reach (VSR) applications, which may limit its applicability for longer distances. The use of on-chip inductors in the pre-amplifier stage could occupy a large chip area, making the design of parallel structures challenging.
1：Experimental Design and Method Selection:
The design includes a pre-amplifier stage and an output stage with a C3A structure to improve the fall time of the laser output waveform. The pre-amplifier is a three-stage low impedance differential CMOS amplifier. The output driver stage is designed to provide sufficient current to modulate the VCSEL array.
2：Sample Selection and Data Sources:
The VCSEL driver chip is implemented in a standard 0.18-μm CMOS process.
3：18-μm CMOS process.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: The optical module is packaged with an MPO multi-mode connector.
4：Experimental Procedures and Operational Workflow:
The performance of the optical module is evaluated by testing the eye diagram at 10Gbps data rate in one channel.
5：Data Analysis Methods:
The eye diagram is used to assess the module's performance.
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