Digital piston error control for high-power laser system...

Details Digital piston error control for high-power laser system... Digital piston error control for high-power laser system...

2011-04-12

2011-04-12

Rodriguez, Armando (Department: 2828)

Coherent light generators

Particular beam control device

Optical output stabilization

C372S026000

Reexamination Certificate

active

07924894

ABSTRACT:
A high-power laser system includes a laser master oscillator, a plurality of fiber laser amplifiers producing intermediate output beamlets, a diffractive optical element for combining the intermediate beamlets into a combined output beam, and a piston error controller for minimizing errors related to beam combination that may degrade the quality of the combined output beam. A piston error controller uses amplitude modulation based on Hadamard code words to tag each non-reference intermediate beamlet with a unique code sequence orthogonal to those used for the other beamlets. For each intermediate beamlet, the associated piston error contribution is recovered using a Hadamard decoder. A very small phase dither is also introduced to allow the sign or direction of the piston error to be recovered. The decoded piston error contribution is processed by a cascaded product detector unit to derive a piston error control signal, which is provided to a phase modulator to thereby adjust the phase of a beamlet and minimize the piston error contributed thereby.

REFERENCES:
patent: 7502395 (2009-03-01), Cheng et al.
patent: 7729398 (2010-06-01), Livingston
patent: 7733930 (2010-06-01), Livingston
patent: 2005/0201429 (2005-09-01), Rice et al.
patent: 2007/0086010 (2007-04-01), Rothenberg
patent: 2007/0201795 (2007-08-01), Rice et al.
patent: 2009/0134310 (2009-05-01), Goodno
patent: 2009/0185176 (2009-07-01), Livingston et al.

Affiliated with

Also associated with

Rating

Digital piston error control for high-power laser system... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital piston error control for high-power laser system..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital piston error control for high-power laser system... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2680253