Freier Christian, Legge Samuel, Roberts Lyle, Wigley Paul B, Close John D, Hardman Kyle S
Appl Opt. 2022 May 20;61(15):4543-4548. doi: 10.1364/AO.456360.
This paper describes a filled-aperture coherent beam combining (CBC) system based on locking of optical coherence via single-detector electronic-frequency tagging (LOCSET). The sensing and control architecture is implemented using a field-programmable gate array and high-bandwidth electro-optic phase modulators. The all-fiber optical configuration consists of a narrow linewidth 1560 nm seed laser separated into three channels, each containing 7 W erbium-doped fiber amplifiers. The system was demonstrated experimentally, achieving a total stabilized output power of 20 W, a combination efficiency greater than 95%, and an output RMS phase stability of /493. As this architecture employs an entirely digital sensing and control scheme based on LOCSET, it presents a highly scalable and cost-effective solution for CBC that is wavelength agnostic and can support an arbitrarily large number of channels.
本文描述了一种基于单探测器电子频率标记的光学相干锁定（LOCSET）的填充孔径相干光束合成（CBC）系统。传感和控制架构采用现场可编程门阵列和高带宽电光相位调制器实现。全光纤光学配置由一个窄线宽1560 nm种子激光器组成，该激光器被分成三个通道，每个通道包含7 W掺铒光纤放大器。该系统通过实验得到验证，实现了20 W的总稳定输出功率、大于95%的合成效率以及/493的输出均方根相位稳定性。由于该架构采用了基于LOCSET的完全数字传感和控制方案，它为CBC提供了一种高度可扩展且具有成本效益的解决方案，该方案与波长无关，并且可以支持任意数量的通道。
