Self-reference locking of optical coherence by...

Details Self-reference locking of optical coherence by... Self-reference locking of optical coherence by...

2007-06-19

2007-06-19

Hellner, Mark (Department: 3663)

Optical: systems and elements

Optical amplifier

Beam combination or separation

C342S371000, C342S372000

Reexamination Certificate

active

11465884

ABSTRACT:
A coherent laser beam combining system wherein the output of a single master oscillator is split into a plurality of signals, the signals are electronically modulated at unique frequencies. One signal is designated a reference signal while the remaining signals are passed through phase adjusters. All signals are optically amplified, aligned and passed through a beam splitter to split off a small sample that is imaged onto a photodetector. The photodetector output is fed to a signal processor that produces phase error signals that drive the phase adjusters resulting in a high-powered optically coherent output signal.

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S.J. Augst, et al, “Coherent Beam Combining and Phase Noise Measurements of Yb fiber Amplifiers,” Optics Letters, vol. 29, No. 5, pp. 474-476, Mar. 1, 2004.

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