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Monolithically integrated multi-wavelength grating-coupled surface-emitting laser arrays with an oxide-confined
Optics Express
|December 19, 2025
Summary
We developed a new method for integrated multi-wavelength surface-emitting laser arrays (MWSELAs). This approach enables precise wavelength control and stable single-mode operation, paving the way for cost-effective laser manufacturing.
Area of Science:
- Optoelectronics
- Semiconductor Lasers
- Integrated Photonics
Background:
- Monolithically integrated multi-wavelength surface-emitting laser arrays (MWSELAs) are crucial for various applications.
- Existing fabrication methods can be complex and costly.
Purpose of the Study:
- To propose and demonstrate a novel, simplified method for fabricating monolithically integrated MWSELAs.
- To achieve precise wavelength control and stable single-mode operation in a multi-wavelength array.
Main Methods:
- Fabrication of a six-wavelength grating-coupled surface-emitting laser (GCSEL) array.
- Tuning emission wavelengths by adjusting surface grating periods within an identical epitaxial structure.
- Experimental validation of device performance.
Main Results:
- Achieved precise wavelength control with an average spacing of 1.6 nm.
- Demonstrated excellent single-mode operation with side-mode suppression ratios > 30 dB.
- Observed low threshold currents of approximately 1.5 mA.
Conclusions:
- The proposed method offers a feasible pathway for realizing monolithically integrated MWSELAs.
- The simplified fabrication process and excellent performance characteristics make it suitable for cost-effective manufacturing.
- Advantages include low power consumption, stable single-mode performance, and wafer-level compatibility.
