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Taper device for tolerant coupling of free-space optical beams into single-mode fiber

 
: Weinert, C.M.; Hiegemann, S.; Perlot, N.; Rohde, M.; Hoh, D.; Unger, S.

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IEEE Photonics Technology Letters 26 (2014), Nr.18, S.1843-1846
ISSN: 1041-1135
Englisch
Zeitschriftenaufsatz
Fraunhofer HHI ()

Abstract
A new device for improving the free-space optical monitoring and coupling into a single mode fiber is proposed. It consists of a fiber taper, which can easily be drawn from a suitable fiber with large core radius. The taper acts as a mode filter discarding higher order modes. A first device is fabricated. Measurements show that lateral tolerances increase linearly with the taper input core radius and longitudinal tolerances increase with the square of the input core radius.

: http://publica.fraunhofer.de/dokumente/N-351662.html