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125-TW Ti:sapphire/Nd:glass laser system
Optics Letters
|February 15, 1997
Summary
We developed a high-energy laser system producing 125 terawatt (TW) pulses. This system achieves ultra-high peak irradiance exceeding 10^20 W/cm^2 for advanced research applications.
Area of Science:
- Laser physics and high-intensity phenomena.
- Advanced optical materials and systems.
Background:
- High-power laser systems are crucial for exploring fundamental physics.
- Achieving ultra-high peak irradiance requires sophisticated laser architecture and focusing optics.
Purpose of the Study:
- To demonstrate a novel Ti:sapphire/Nd:glass laser system capable of generating high-energy, ultrashort pulses.
- To characterize the system's focusing capabilities and achievable peak irradiance.
- To assess the damage threshold of large-aperture diffraction gratings used in the system.
Main Methods:
- Utilized a hybrid Ti:sapphire/Nd:glass laser architecture.
- Employed f/3 focusing optics to achieve a tightly focused spot.
- Measured pulse energy, duration, and focal spot characteristics.
- Tested gold diffraction gratings for laser-induced damage threshold.
Main Results:
- Generated laser pulses with up to 51 J of energy and 395-fs duration, resulting in 125 terawatts (TW) peak power.
- Achieved a peak irradiance greater than 10^20 W/cm^2.
- Determined a damage threshold of 0.42 J/cm^2 for 40-cm-diameter gold diffraction gratings at 320-fs pulse duration.
Conclusions:
- The demonstrated laser system provides unprecedented peak irradiance for scientific investigations.
- The high damage threshold of the diffraction gratings supports the scalability of such systems.
- This technology enables new frontiers in high-intensity laser-matter interactions.
