Tünnermann Henrik, Pöld Jan Hendrik, Neumann Jörg, Kracht Dietmar, Willke Benno, Wessels Peter
Laser Zentrum Hannover e.V., Hollerithallee 8, 30419 Hannover, Germany.
Opt Express. 2011 Sep 26;19(20):19600-6. doi: 10.1364/OE.19.019600.
Collinear coherent combination of multiple single frequency fiber amplifiers is a promising approach to realize the high power laser sources required for 3rd generation gravitational wave detectors (GWD), as long as the stringent requirements on the beam quality and noise properties can be met. Here, we report the beam quality and noise properties of two coherently combined 10 W single frequency amplifiers with respect to the requirements of GWD. The combining efficiency was larger than 95% with 97% of the combined beam in the fundamental spatial mode. There was no significant noise increase compared to the fluctuations of the single amplifier.
多个单频光纤放大器的共线相干组合是实现第三代引力波探测器（GWD）所需高功率激光源的一种很有前景的方法，只要能满足对光束质量和噪声特性的严格要求。在此，我们报告了两台相干组合的10W单频放大器相对于GWD要求的光束质量和噪声特性。组合效率大于95%，组合光束的97%处于基本空间模式。与单台放大器的波动相比，噪声没有显著增加。
