Ronen Eitan, Ishaaya Amiel A
Department of Electrical and Computer Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
Opt Express. 2011 Jan 17;19(2):1510-5. doi: 10.1364/OE.19.001510.
We demonstrate phase locking of a linear array of seven fiber lasers via diffractive coupling. Coupling between the lasers is achieved by a common output coupler positioned at a quarter Talbot distance from the lasers. The output beams are anti-phase locked with a measured far-field fringe contrast of 82%, and their total output power is higher than that obtained when the lasers operate individually. We measure an exponential phase decorrelation between distant lasers in the array, and discuss its fundamental limitation on scalability of this and similar local coupling methods.
我们通过衍射耦合展示了由七个光纤激光器组成的线性阵列的锁相。激光器之间的耦合是通过一个位于距激光器四分之一塔尔博特距离处的公共输出耦合器实现的。输出光束实现了反相锁定，测得的远场条纹对比度为82%，并且它们的总输出功率高于激光器单独工作时获得的功率。我们测量了阵列中远距离激光器之间的指数相位去相关，并讨论了其对这种以及类似局部耦合方法可扩展性的基本限制。
