A 1.4 kW 780 nm pulsed diode laser, high duty cycle, passively side-cooled pump module

Area of Science:

• Optics and Photonics
• Semiconductor Lasers

Background:

• High-power diode lasers are crucial for various applications.
• Optimizing duty cycle and beam quality is essential for advanced laser systems.

Purpose of the Study:

• To present a novel diode laser module.
• To optimize the module for high duty-cycle operation and evaluate its beam quality.

Main Methods:

• Development of a micro-channel free diode laser module.
• Optical power and beam quality measurements near 780 nm.
• Characterization across a range of pulse widths and high duty cycles (≥ 10%).

Main Results:

• Achieved 1.4 kW optical in-pulse power near 780 nm.
• Demonstrated high duty-cycle operation (≥ 10%) without micro-channels.
• Measured beam quality with a nearly symmetric M² of 205 × 295.

Conclusions:

• The presented diode laser module offers high power and excellent beam quality at high duty cycles.
• The micro-channel free design is effective for demanding laser applications.
• This technology advances capabilities in high-power diode laser systems.