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.

Date Published: 13 March 2015
PDF: 6 pages
Proc. SPIE 9348, High-Power Diode Laser Technology and Applications XIII, 93480Z (13 March 2015); doi: 10.1117/12.2078312

Published in SPIE Proceedings Vol. 9348:
High-Power Diode Laser Technology and Applications XIII
Mark S. Zediker, Editor(s)