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Phase-conjugate Nd:YAG laser with internal acousto-optic beam steering
Optics Letters
|September 25, 2009
Summary
We developed a new Nd:YAG laser using stimulated Brillouin scattering for phase conjugation and beam steering. This laser achieves high pulse energies and rapid, electronically controlled beam pointing for advanced applications.
Area of Science:
- Laser physics
- Nonlinear optics
- Photonics
Background:
- Phase conjugation is crucial for correcting optical aberrations and improving laser beam quality.
- Stimulated Brillouin scattering (SBS) offers a robust mechanism for phase conjugation in solid-state lasers.
- Beam steering is essential for applications requiring precise spatial control of laser output.
Purpose of the Study:
- To propose and experimentally demonstrate a novel Nd:YAG laser source.
- To integrate stimulated Brillouin scattering (SBS) for phase conjugation.
- To incorporate beam-steering capability into the laser system.
Main Methods:
- The laser was designed in an oscillator-amplifier configuration.
- A tellurium dioxide (TeO2) acousto-optic deflector was integrated into the low-energy beam path.
- Stimulated Brillouin scattering was utilized for phase conjugation.
Main Results:
- The laser system achieved output pulse energies between 100-185 mJ.
- A 2.7-degree full angular bandwidth with 40 resolved beam directions was demonstrated.
- Electronically controlled random beam pointing with a 5-microsecond access time was achieved.
Conclusions:
- The demonstrated Nd:YAG laser offers a powerful and versatile source with phase-conjugate properties.
- The integrated beam-steering capability provides precise and rapid spatial control of the laser output.
- This technology has potential applications in areas requiring high-energy, steerable laser beams.
