Coupling of a high-power tapered diode laser beam into a single-mode-fiber within a compact module
D. Jedrzejczyk1, A. Sahm1, C. Carstens2, G. Urban2, M. Pulka3, B. Eppich1, F. Scholz4 and K. Paschke1
Published in:
Proc. SPIE 9348, Photonics West, San Francisco, USA, Feb. 07-12, 93480Z (2015).
Abstract:
In this work, coupling of radiation generated by a distributed Bragg reflector (DBR) tapered diode laser around 1064 nm into a single-mode-fiber (SMF) within a butterfly module with a footprint < 10 cm2 is demonstrated. The module comprises temperature stabilizing components, a brightness maintaining micro optical assembly mounted with submicrometer precision and a standard FC/APC output connector. The aim of the introduced concept is to improve the beam quality and to eliminate the current dependent beam astigmatism, characteristic for tapered diode lasers and amplifiers, and, thus, provide an efficient, multi-Watt laser light source characterized by a narrow-band spectrum and a stigmatic, nearly Gaussian laser beam independent of the operating point. A maximum power ex SMF of 2.5 W at a coupling efficiency of 57 % is reached in the presented butterfly module.
1 Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, 12489 Berlin, Germany
2 C2GO inprocess solutions GmbH, Schwarzschildstraße 1, 12489 Berlin, Germany
3 FCC FibreCableConnect GmbH Max-Planck-Str. 3, 12489 Berlin, Germany
4 eagleyard Photonics GmbH, Rudower Chaussee 29, 12489 Berlin
Keywords:
high-power, high-brightness, fiber coupled module, single-mode-fiber, DBR tapered diode laser.
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