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Circular versus linear polarization in laser-amplifiers with Kerr-nonlinearity

: Schimpf, D.N.; Eidam, T.; Seise, E.; Hädrich, S.; Limpert, J.; Tünnermann, A.

Postprint (710 KByte; PDF; )

Optics Express 17 (2009), No.21, pp.18774-18781
ISSN: 1094-4087
Journal Article, Electronic Publication
Fraunhofer IOF ()
photonic crystal fiber; pulse energy; system

In this contribution it is reported that circularly polarized light is advantageous if the Kerr-effect has to be minimized during laser-amplification. The experimental demonstration is based on a fiber CPA-system. The different polarization states result in different B-integrals, which are measured using phase-only pulse-shaping. The theoretical value of 2/3 for the ratio of the B-integrals of circularly and linearly polarized light is experimentally verified. In laser-amplifiers circularly polarized light reduces the detrimental impact of the Kerr-nonlinearity, and thus, increases the peak-power and the self-focussing threshold.