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

Autor: Goodno GD; Northrop Grumman Aerospace Systems, One Space Park, R1-1184D, Redondo Beach, California 90278, USA*Corresponding author: gregory.goodno@ngc.com, McNaught SJ, Rothenberg JE, McComb TS, Thielen PA, Wickham MG, Weber ME
Jazyk: angličtina
Zdroj: Optics letters [Opt Lett] 2010 May 15; Vol. 35 (10), pp. 1542-4.
DOI: 10.1364/OL.35.001542
Abstrakt: 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.
Databáze: MEDLINE