Compact 4.7 W, 18.3% wall-plug efficiency green laser based on an electrically pumped VECSEL using intracavity...

Area of Science:

• Optics and Photonics
• Laser Technology
• Solid-State Physics

Background:

• Development of efficient and compact green lasers is crucial for various applications.
• Electrically pumped lasers offer advantages in terms of size and power requirements.
• Frequency doubling techniques are essential for generating visible laser light from infrared sources.

Purpose of the Study:

• To demonstrate a compact, high-power green laser.
• To achieve high wall-plug efficiency in an electrically pumped laser system.
• To evaluate the power stability of the developed green laser.

Main Methods:

• Utilized an electrically pumped vertical external-cavity surface-emitting laser (VECSEL).
• Implemented intracavity frequency doubling to generate green light.
• Measured overall wall-plug efficiency and power fluctuations over a 2-hour period.

Main Results:

• Achieved a compact 4.7 W green laser output.
• Attained an overall wall-plug efficiency of 18.3% (electrical to green).
• Demonstrated low power fluctuations of ±1.4% over 2 hours.

Conclusions:

• The demonstrated VECSEL is a promising compact source for green laser applications.
• High efficiency and stable operation were achieved, validating the design.
• Intracavity frequency doubling in VECSELs is an effective method for green light generation.