Evaluation scheme for the design of poweroptimized single mode vertical-cavity surfaceemitting lasers

Area of Science:

• Optoelectronics
• Semiconductor Devices
• Photonics

Background:

• Single mode Vertical-Cavity Surface-Emitting Lasers (VCSELs) are crucial for optical communication.
• Optimizing VCSEL design for power and mode stability remains a challenge.
• Understanding mode transition mechanisms is key to improving device performance.

Purpose of the Study:

• To propose a simplified and efficient evaluation procedure for designing power-optimized single mode VCSELs.
• To introduce and test novel VCSEL structures based on the developed evaluation procedure.
• To enhance the fundamental mode stability of VCSELs over an extended current range.

Main Methods:

• Reviewing the physical mechanisms governing mode transition in VCSELs.
• Developing a simplified computational procedure for device evaluation.
• Designing and simulating new VCSEL structures using the proposed method.

Main Results:

• The proposed evaluation procedure is simple and efficient.
• New VCSEL structures were designed and tested.
• The proposed designs demonstrated significantly improved fundamental mode stability.
• Enhanced stability was observed over a wider current range compared to conventional designs.

Conclusions:

• The developed evaluation procedure effectively aids in the design of power-optimized single mode VCSELs.
• The novel VCSEL structures exhibit superior fundamental mode stability.
• This work provides a pathway for more robust and efficient VCSEL performance.