Thermal Optimization of Edge-Emitting Lasers Arrays.

Area of Science:

• Optoelectronics
• Materials Science
• Thermal Engineering

Background:

• Gallium nitride (GaN) edge-emitting lasers are crucial for green light emission.
• Uneven temperature distribution in laser arrays leads to performance degradation.
• Existing cooling solutions for laser arrays can be complex and costly.

Purpose of the Study:

• To develop a novel thermal optimization method for one-dimensional (1D) laser arrays.
• To address uneven temperature distribution in GaN edge-emitting lasers.
• To enhance laser array performance without complex cooling systems.

Main Methods:

• Heat flow numerical analysis was employed to study temperature distribution.
• A specialized optimization method was developed for 1D laser arrays.
• Emitter placement and top gold contact size were key parameters investigated.

Main Results:

• Achieved even temperature distribution in a 1D GaN edge-emitting laser array (540 nm).
• Demonstrated that emitter placement and contact size optimization is effective.
• Showcased that overall device dimensions do not need alteration for thermal optimization.

Conclusions:

• The proposed thermal optimization method ensures uniform temperature across laser arrays.
• This approach eliminates the need for complex and expensive cooling systems.
• The optimization technique is applicable to various material systems, including nitrides, arsenides, and phosphides.