Low-noise, single-frequency 200 W fiber amplifier

Felix Wellmann; Michael Steinke; Fabian Meylahn; Nina Bode; Benno Willke; Ludger Overmeyer; Peter Weßels; Jörg Neumann; Dietmar Kracht

doi:10.1117/12.2543292

21 February 2020 Low-noise, single-frequency 200 W fiber amplifier

Felix Wellmann, Michael Steinke, Fabian Meylahn, Nina Bode, Benno Willke, Ludger Overmeyer, Peter Weßels, Jörg Neumann, Dietmar Kracht

Author Affiliations +

Proceedings Volume 11260, Fiber Lasers XVII: Technology and Systems; 1126013 (2020) https://doi.org/10.1117/12.2543292
Event: SPIE LASE, 2020, San Francisco, California, United States

Abstract

Gravitational wave detectors require single-frequency laser sources with challenging properties regarding beam quality, polarization, and noise properties. We developed a single-frequency fiber amplifier engineering prototype based on standard step-index polarization maintaining fibers and characterized the 200 W output beam with the complete set of measurements necessary to evaluate the system's performance with respect to the application requirements. The output beam has a TEM₀₀-mode content of 94:8% at 200W and a polarization extinction ratio of 19 dB. In the crucial frequency range from 1 Hz to 100 kHz the frequency noise, relative power noise, and relative pointing noise measurements demonstrated low noise properties. In addition, the pointing noise below 100 Hz is the lowest reported for single-frequency amplifiers with 200W output power. SBS-free operation was demonstrated by monitoring the relative power noise in the MHz frequency range. The system was operated above 200W for 695 h and evaluated again after 650 h of operation. No signs of photodarkening were found.

Conference Presentation

Citation Download Citation

Felix Wellmann, Michael Steinke, Fabian Meylahn, Nina Bode, Benno Willke, Ludger Overmeyer, Peter Weßels, Jörg Neumann, and Dietmar Kracht "Low-noise, single-frequency 200 W fiber amplifier", Proc. SPIE 11260, Fiber Lasers XVII: Technology and Systems, 1126013 (21 February 2020); https://doi.org/10.1117/12.2543292

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