Short-pulse actively Q-switched Er:YAG lasers

Area of Science:

• Laser Physics
• Materials Science
• Optical Engineering

Background:

• Q-switched Erbium-doped Yttrium Aluminum Garnet (Er:YAG) lasers are crucial for various applications.
• Achieving shorter pulse durations and higher pulse energies is a key research objective.
• Existing pumping methods often limit performance.

Purpose of the Study:

• To report the shortest pulse duration achieved from an actively Q-switched Er:YAG laser.
• To investigate the performance of a laser diode end-pumped co-planar folded zigzag slab architecture.
• To develop an analytical model for predicting pulse energy-duration products in Q-switched lasers.

Main Methods:

• Utilized an actively Q-switched Er:YAG laser.
• Employed a 1470 nm laser diode for end-pumping.
• Implemented a co-planar folded zigzag slab architecture.
• Developed an analytical model for pulse energy-duration product prediction.

Main Results:

• Achieved the shortest pulse duration to date: 14.5 nanoseconds (ns).
• Obtained pulse energy of 6 millijoules (mJ).
• The developed analytical model accurately predicts performance for Q-switched Er:YAG and quasi-three-level lasers.

Conclusions:

• The novel pumping scheme and architecture enable unprecedented short pulse durations from Er:YAG lasers.
• The analytical model provides a valuable tool for designing and optimizing Q-switched laser systems.
• This work advances the capabilities of high-energy, short-pulse laser sources.