研究目的
Investigating the monolithic integration of vertical-cavity surface-emitting laser (VCSEL) and coupled cavity resonant cavity enhancement photodiode (ccRCEPD) for short-reach single-fiber bidirectional optical interconnects.
研究成果
The monolithic integration of VCSEL and ccRCEPD offers a compact solution for bidirectional optical interconnects with reduced costs and space. The VCSELs exhibit good threshold currents and slope efficiencies, while the PDs show broad spectral line widths for temperature tolerance. Further optimization can enhance the modulation bandwidth and PD performance.
研究不足
The absorption layer of PD causes optical losses in the VCSEL cavity, leading to a decrease in output power. The thickness and location of the absorption layer need optimization for higher bandwidth.
1：Experimental Design and Method Selection:
The study proposes a monolithic integration structure of VCSEL and ccRCEPD for bidirectional optical interconnects. The design includes a special mirror, active region, and ccRCEPD sections.
2：Sample Selection and Data Sources:
GaAs-based multiple quantum wells (MQWs) and AlGaAs cladding layers are used. The chips are designed for transmitting at 850 nm and receiving at 810 nm, and vice versa.
3：List of Experimental Equipment and Materials:
The simulation uses TCAD Atlas for electrical, thermal, and optical simulations. The materials include GaAs, AlGaAs, and InGaAs/AlGaAs for MQWs.
4：Experimental Procedures and Operational Workflow:
The performance of VCSEL and PD is simulated under different conditions to analyze static and dynamic characteristics.
5：Data Analysis Methods:
The study uses the transfer matrix method for optical properties and FFT method for small-signal modulation response.
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