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Loss-tailoring single-mode high-power supersymmetric lasers.
Optics Letters
|June 2, 2024
Summary
This study confirms mode instability in supersymmetric diode lasers at high currents. A novel loss-tailoring design achieves stable fundamental-mode output and improved beam quality for diode lasers.
Area of Science:
- Optics and Photonics
- Semiconductor Lasers
Background:
- High beam quality and high power in diode lasers are often conflicting.
- Mode instability in supersymmetric structures at higher operating currents is a known issue.
Purpose of the Study:
- To theoretically and experimentally confirm mode instability in supersymmetric structures.
- To propose a novel loss-tailoring diode laser design for stable fundamental-mode operation.
Main Methods:
- Theoretical analysis of mode instability.
- Experimental verification using fabricated diode lasers.
- Implementation of a loss-tailoring mechanism in a supersymmetric structure.
Main Results:
- Mode instability confirmed in supersymmetric structures at higher currents.
- A loss-tailoring diode laser achieved stable fundamental-lateral-mode output.
- Reduced far-field FWHM by 65% and improved M² by 37% compared to traditional lasers.
Conclusions:
- The proposed loss-tailoring diode laser effectively suppresses higher-order lateral modes.
- This design enables stable, high-quality beam output from diode lasers at higher operating currents.
