Transverse mode tailoring in a quasi-imaging high-finesse femtosecond enhancement cavity | Zendy

Johannes Weitenberg | Zendy; P. Rußbüldt | Zendy; Tino Eidam | Zendy; Ioachim Pupeza | Zendy

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Transverse mode tailoring in a quasi-imaging high-finesse femtosecond enhancement cavity

Author(s) -

Johannes Weitenberg,

P. Rußbüldt,

Tino Eidam,

Ioachim Pupeza

Publication year - 2011

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.19.009551

Subject(s) - finesse , optics , femtosecond , harmonics , transverse plane , physics , coupling (piping) , laser , materials science , fabry–pérot interferometer , structural engineering , quantum mechanics , voltage , engineering , metallurgy

We demonstrate a high-finesse femtosecond enhancement cavity with an on-axis obstacle. By inserting a wire with a width of 5% of the fundamental mode diameter, the finesse of F = 3400 is only slightly reduced to F = 3000. The low loss is due to the degeneracy of transverse modes, which allows for exciting a circulating field distribution avoiding the obstacle. We call this condition quasi-imaging. The concept could be used for output coupling of intracavity-generated higher-order harmonics through an on-axis opening in one of the cavity mirrors.

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