Prepulse-free 30-TW, 1-ps Nd:glass laser.

Area of Science:

• Laser Physics
• Nonlinear Optics
• High-Intensity Lasers

Background:

• Chirped-pulse amplification (CPA) is a technique for generating high-power laser pulses.
• Nd:phosphate glass is a common gain medium for high-energy lasers.
• Controlling prepulse intensity is crucial for applications requiring clean, high-intensity pulses.

Purpose of the Study:

• To generate high-energy, ultrashort laser pulses using CPA.
• To improve the peak-to-prepulse intensity ratio of the amplified laser pulse.
• To demonstrate the effectiveness of temporal windowing in CPA systems.

Main Methods:

• Utilized a large-aperture Nd:phosphate glass laser system.
• Employed chirped-pulse amplification (CPA) to generate a 30-TW pulse.
• Implemented temporal windowing on a self-phase-modulated chirped pulse prior to amplification and compression.
• Achieved a pulse duration of 1.0 picosecond (ps) at a wavelength of 1053 nm.

Main Results:

• Successfully generated a 30-terawatt (TW) laser pulse.
• Achieved a pulse duration of 1.0 picosecond (ps).
• Obtained a peak-to-prepulse intensity ratio exceeding 10^7 through temporal windowing.

Conclusions:

• Chirped-pulse amplification in a Nd:phosphate glass system can produce high-power, ultrashort laser pulses.
• Temporal windowing is an effective method for significantly enhancing the peak-to-prepulse intensity ratio.
• The demonstrated technique is valuable for applications demanding high laser pulse quality.