研究目的
Investigating the supermode tuning of coherent 3×1 vertical-cavity surface-emitting laser arrays and simulating their behavior under various electrical biases.
研究成果
The study demonstrates the diversity of coherent array supermodes possible from coherent photonic crystal 3×1 VCSEL arrays and shows that independent injection can control the array supermode. The developed model can simulate the near-field and far-field supermodes, making tunable coherent VCSEL arrays viable candidates for applications in high brightness, optical pumping, and LiDAR.
研究不足
The study focuses on 3×1 VCSEL arrays and may not be directly applicable to arrays with a different number of elements. The model assumes a one-dimensional cold-cavity array supermode and ignores the influence from the photonic crystal lattice and thermal index changes.
1：Experimental Design and Method Selection:
The study involves characterizing and simulating the supermode tuning of coherent 3×1 VCSEL arrays using selective current injection. An effective index model is developed to simulate the supermodes.
2：Sample Selection and Data Sources:
GaAs-based VCSEL arrays fabricated with three quantum wells in the active region, designed for 850 nm wavelength emission.
3：List of Experimental Equipment and Materials:
GaAs-based VCSEL arrays, ion implantation for electrical isolation, Ti/Au contact pads and traces for individual addressability.
4：Experimental Procedures and Operational Workflow:
The array elements are resonantly tuned to achieve coherent operation. The near-field and far-field coherent modes are measured and compared with model simulations.
5：Data Analysis Methods:
The Helmholtz equation is used to calculate the near-field intensity profile, and a Fraunhofer approximation is performed to calculate the far-field profile.
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