Passive phasing of fiber amplifiers

Details Passive phasing of fiber amplifiers Passive phasing of fiber amplifiers

2006-10-31

2006-10-31

Keith, Jack (Department: 3663)

Optical: systems and elements

Optical amplifier

Beam combination or separation

C359S337000, C359S298000, C372S006000

Reexamination Certificate

active

07130113

ABSTRACT:
A method passively locks and phases an array of fiber amplifiers in a fiber amplifier system that emits a beam, such as a laser beam. The method locks the fiber amplifiers so that the fiber amplifiers operate at same or similar frequencies. The method samples a small portion of the emitted beam in a far-field around a central lobe on an optical axis and then couples this portion of emitted beam back into the array of fiber amplifiers. The fiber amplifiers may be phased so that the emitted beam concentrates its energy around the central lobe in the far-field. Phasing may be achieved by using an aperture, for example, to restrict the portion of the emitted beam to be coupled back to a restricted region around the optical axis.

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