Low temperature diode pumped active mirror Yb³⁺:YAG disk laser amplifier studies

Area of Science:

• Laser physics and engineering
• Thermal management in optical systems
• Materials science for solid-state lasers

Background:

• Effective heat management is crucial for high-power laser systems.
• Static heat switches offer potential for precise thermal control in demanding applications.
• Ceramic Ytterbium-doped Yttrium Aluminum Garnet (Yb:YAG) is a key material for efficient laser amplification.

Purpose of the Study:

• To investigate the efficacy of a static helium gas gap heat switch for laser amplification.
• To evaluate the thermal performance and gain characteristics of a diode-pumped active mirror amplifier utilizing this heat switch concept.
• To determine the operational temperature range for optimal performance.

Main Methods:

• Experimental setup of a static helium gas gap heat switch.
• Integration with a diode-pumped active mirror amplifier.
• Utilizing large co-sintered ceramic Yb:YAG disks as the gain medium.
• Temperature measurements in the 80-200K range.

Main Results:

• Successful implementation of the static helium gas gap heat switch concept.
• Achieved high single-pass gains with the Yb:YAG disks.
• Demonstrated effective operation within the 80-200K temperature range.
• Validated the heat switch's capability to support laser amplification.

Conclusions:

• The static helium gas gap heat switch is a viable technology for thermal management in laser amplification.
• Co-sintered ceramic Yb:YAG disks perform effectively at low temperatures with this heat switch.
• The study confirms the potential for efficient diode-pumped active mirror amplifiers.