All-fiber 7x1 signal combiner for incoherent laser beam combining

D. Noordegraaf; M. D. Maack; P. M. W. Skovgaard; J. Johansen; F. Becker; S. Belke; M. Blomqvist; J. Laegsgaard

doi:10.1117/12.875078

10 February 2011 All-fiber 7x1 signal combiner for incoherent laser beam combining

D. Noordegraaf, M. D. Maack, P. M. W. Skovgaard, J. Johansen, F. Becker, S. Belke, M. Blomqvist, J. Laegsgaard

Proceedings Volume 7914, Fiber Lasers VIII: Technology, Systems, and Applications; 79142L (2011) https://doi.org/10.1117/12.875078
Event: SPIE LASE, 2011, San Francisco, California, United States

Abstract

We demonstrate an all-fiber 7x1 signal combiner for incoherent laser beam combining. This is a potential key component for reaching several kW of stabile laser output power. The combiner couples the output from 7 single-mode (SM) fiber lasers into a single multi-mode (MM) fiber. The input signal fibers have a core diameter of 17 μm and the output MM fiber has a core diameter of 100 μm. In a tapered section light gradually leaks out of the SM fibers and is captured by a surrounding fluorine-doped cladding. The combiner is tested up to 2.5 kW of combined output power and only a minor increase in device temperature is observed. At an intermediate power level of 600 W a beam parameter product (BPP) of 2.22 mm x mrad is measured, corresponding to an M² value of 6.5. These values are approaching the theoretical limit dictated by brightness conservation.

Citation Download Citation

D. Noordegraaf, M. D. Maack, P. M. W. Skovgaard, J. Johansen, F. Becker, S. Belke, M. Blomqvist, and J. Laegsgaard "All-fiber 7x1 signal combiner for incoherent laser beam combining", Proc. SPIE 7914, Fiber Lasers VIII: Technology, Systems, and Applications, 79142L (10 February 2011); https://doi.org/10.1117/12.875078

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available