Real-time wavefront correction system using a zonal deformable mirror and a Hartmann sensor
We have developed an adaptive optics system that corrects up to five waves of 2nd-order and 3rd-order aberrations in a high-power laser beam to less than 1/10th wave RMS. The wavefront sensor is a Hartmann sensor with discrete lenses and position-sensitive photodiodes; the deformable mirror uses piezoelectric actuators with feedback from strain gauges bonded to the stacks. The controller hardware uses a VME bus. The system removes thermally induced aberrations generated in the master-oscillator-power-amplifier chains of a dye laser, as well as aberrations generated in beam combiners and vacuum isolation windows for average output powers exceeding 1 kW. The system bandwidth is 1 Hz, but higher bandwidths are easily attainable.
- Research Organization:
- Lawrence Livermore National Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 10118200
- Report Number(s):
- UCRL-JC-105847; CONF-9107115-64; ON: DE92006891
- Resource Relation:
- Conference: Society of Photo-Optical Instrumentation Engineers (SPIE) meeting,San Diego, CA (United States),21-26 Jul 1991; Other Information: PBD: Jul 1991
- Country of Publication:
- United States
- Language:
- English
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