Berlin 2014 – scientific programme

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A: Fachverband Atomphysik

A 54: Precision measurements and metrology IV (with Q)

A 54.6: Talk

Friday, March 21, 2014, 15:30–15:45, DO24 1.101

Characterization of a high-power fiber amplifier — •Patrick Oppermann¹, Thomas Theeg², Hakan Sayinc², and Benno Willke¹ — ¹Albert-Einstein-Institut Hannover — ²Laser Zentrum Hannover e. V.

A detailed beam characterization of continuous-wave single frequency fiber amplifier with an output power of more than 200 W at a wavelength of 1064 nm is presented. The power noise, frequency noise, beam pointing fluctuations and spatial beam quality were measured with a diagnostic instrument called diagnostic breadboard based on an optical ring resonator. The results are compared with the Advanced LIGO Pre-Stabilized Laser system. The laser was automatically characterized over a period of three weeks to investigate the long-term behavior. During this time the laser was running 24 hours a day, without showing any significant problems.