OPTICAL AMPLIFICATION SYSTEM

PROBLEM TO BE SOLVED: To increase the energy storage potential in an optical fiber amplifier and to produce peak power and pulse energy which are higher than those achievable in single-mode (SM) fibers before the onset of undesirable nonlinearity and gain saturation.SOLUTION: An optical amplificatio...

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Bibliographische Detailangaben
Hauptverfasser: FERMANN MARTIN E, HARTER DONALD J DR
Format: Patent
Sprache:eng
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Zusammenfassung:PROBLEM TO BE SOLVED: To increase the energy storage potential in an optical fiber amplifier and to produce peak power and pulse energy which are higher than those achievable in single-mode (SM) fibers before the onset of undesirable nonlinearity and gain saturation.SOLUTION: An optical amplification system comprises: a fiber oscillator 10 as a laser source generating an input beam having a nearly diffraction limited mode; a multi-mode fiber amplifier 12; a mode converter 14 receiving the input beam and converting the mode of the input beam to match a fundamental mode of the multi-mode fiber amplifier 12, and providing a mode-converted input beam to the multi-mode fiber amplifier 12; and a pump source 20 optically pumping the multi-mode fiber amplifier 12 to generate an intense amplified beam substantially in the fundamental mode.