High-power, widely-tunable Cr(2+):ZnSemaster oscillator power amplifier systems

Area of Science:

• Laser Physics
• Materials Science
• Optical Engineering

Background:

• Chromium-doped II-VI semiconductors are promising gain media for mid-infrared lasers.
• Master Oscillator Power Amplifier (MOPA) architectures are crucial for achieving high output power in laser systems.

Purpose of the Study:

• To demonstrate a high-power, continuous wave (CW) Cr(2+):ZnSe MOPA laser system.
• To develop a theoretical model for Cr(2+):ZnSe MOPA amplification.
• To investigate the tunability of the high-power laser system.

Main Methods:

• Fabrication and characterization of a Cr(2+):ZnSe MOPA laser system.
• Development of a theoretical model to describe the amplification process.
• Experimental measurement of output power, amplifier gain, and wavelength tunability.

Main Results:

• Achieved 14 W output power from the Cr(2+):ZnSe MOPA laser.
• Demonstrated an amplifier gain greater than 2X.
• Showcased single-knob tunability over a 400 nm wavelength range at high power.

Conclusions:

• High-power CW operation of Cr(2+):ZnSe MOPA lasers is feasible.
• The developed theoretical model accurately describes the amplification dynamics.
• The system offers versatile tunability for various applications.