1.4kW 光纤放大器的激活相和偏振锁定。

Active phase and polarization locking of a 1.4 kW fiber amplifier.

机构信息

Northrop Grumman Aerospace Systems, One Space Park, R1-1184D, Redondo Beach, California 90278, USA*Corresponding author:

出版信息

Opt Lett. 2010 May 15;35(10):1542-4. doi: 10.1364/OL.35.001542.

DOI:10.1364/OL.35.001542

PMID:20479802

Abstract

A three-stage Yb-fiber amplifier emitted 1.43 kW of single-mode power when seeded with a 25 GHz linewidth master oscillator (MO). The amplified output was polarization stabilized and phase locked using active heterodyne phase control. A low-power sample of the output beam was coherently combined to a second fiber amplifier with 90% visibility. The measured combining efficiency agreed with estimated decoherence effects from fiber nonlinearity, linewidth, and phase-locking accuracy. This is the highest-power fiber laser that has been coherently locked using any method that allows brightness scaling.

摘要

当采用 25GHz 线宽主振荡器 (MO) 对其进行种子注入时，三段式 Yb 光纤放大器可输出 1.43kW 的单模功率。采用有源外差相位控制对放大后的输出光束进行偏振稳定和相位锁定。通过相干组合将输出光束的低功率样本与第二个光纤放大器组合，实现 90%的可视性。测量的组合效率与从光纤非线性、线宽和锁定精度推断出的退相干效应一致。这是使用任何允许亮度扩展的方法进行相干锁定的最高功率光纤激光器。