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arXiv · 1603.04791

Millimeter-long Fiber Fabry-Perot cavities

Konstantin Ott·Sebastien Garcia·Ralf Kohlhaas·Klemens Schüppert·Peter Rosenbusch·Romain Long·Jakob Reichel
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Abstract

We demonstrate fiber Fabry-Perot (FFP) cavities with concave mirrors that can be operated at cavity lengths as large as 1.5mm without significant deterioration of the finesse. This is achieved by using a laser dot machining technique to shape spherical mirrors with ultralow roughness and employing single-mode fibers with large mode area for good mode matching to the cavity. Additionally, in contrast to previous FFPs, these cavities can be used over an octave-spanning frequency range with adequate coatings. We also show directly that shape deviations caused by the fiber's index profile lead to a finesse decrease as observed in earlier attempts to build long FFP cavities, and show a way to overcome this problem.

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Konstantin Ott, Sebastien Garcia, Ralf Kohlhaas, Klemens Schüppert, Peter Rosenbusch, Romain Long, Jakob Reichel. 2016-03-15. Millimeter-long Fiber Fabry-Perot cavities. https://arxiv.org/abs/1603.04791

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