Coupling of DBR tapered diode laser radiation into a single-mode-fiber at high powers
D. Jedrzejczyk1 , P. Asbahr1,2, M. Pulka2, B. Eppich1 and K. Paschke1
Published in:
Proc. SPIE, vol. 8965, Photonics West, San Francisco, USA, Feb. 1-6, 89651A (2014).
Abstract:
In this work, we investigate experimentally coupling of diode laser radiation into a single-mode-fiber (SMF) at high optical power. In particular, nearly diffraction-limited, single-frequency continuous wave (CW) radiation around 1064 nm generated by a distributed Bragg reflector (DBR) tapered diode laser is coupled in a bench-top experiment into an SMF with a core diameter of approx. 6 µm. Misalignment tolerances for efficient SMF coupling are determined through two-dimensional coupling efficiency scans, conducted for an attenuated diode laser beam. The coupling efficiency and the laser beam properties behind the SMF are investigated in dependence on the optical power in front of the SMF. A maximum power ex fiber of 3.5 W at a coupling efficiency of 65% is reached.
1 Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, 12489 Berlin, Germany
2 FCC FibreCableConnect GmbH Max-Planck-Str. 3, 12489 Berlin, Germany
Keywords:
Single-mode-fiber (SMF), fiber coupling, tapered diode laser, distributed Bragg reflector (DBR).
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