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Proceedings Paper

Applications of fiber phase conjugators in high-power lasers
Author(s): Hans Joachim Eichler; Baining Liu; Oliver Mehl
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Paper Abstract

We have developed phase conjugators consisting of multimode fused silica fibers in standard or tapered geometry with core diameters between 25 and 400 micrometer. Such optimized fiber phase conjugators operate with more than 50% reflectivity, 93% fidelity, and less than 200 W threshold in the wavelength range from infrared down to the ultraviolet. A depolarization of SBS pulses could be reduced to less than 0.3% by proper configuration of the fiber. High power densities of more than 1 GW/cm2 do not damage our fiber phase conjugators, because the absorption of the fiber materials used is very low. Furthermore, fiber phase conjugators are harmless to the environment and beat the performance of dangerous liquid or high pressure gas SBS-cells used in high power lasers up to now in all concerns. High economic benefits can be expected due to the popular fiber materials used from the glass fiber technology. New applications of fiber phase conjugators in high power lasers with different architectures and at an average output power of more than 100 W have been demonstrated. Versatile new aspects with this novel adaptive optics for potential applications in high power lasers is summarized.

Paper Details

Date Published: 7 August 1998
PDF: 4 pages
Proc. SPIE 3549, High-Power Lasers: Solid State, Gas, Excimer, and Other Advanced Lasers II, (7 August 1998); doi: 10.1117/12.344137
Show Author Affiliations
Hans Joachim Eichler, Technische Univ. Berlin (Germany)
Baining Liu, Technische Univ. Berlin (Germany)
Oliver Mehl, Technische Univ. Berlin (United States)

Published in SPIE Proceedings Vol. 3549:
High-Power Lasers: Solid State, Gas, Excimer, and Other Advanced Lasers II
Sui-Sheng Mei; Keith A. Truesdell, Editor(s)

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