Mutual injection-locking and coherent combining of two individual fiber lasers

作者：Chen, Zilun^*; Hou, Jing; Zhou, Pu; Jiang, Zongfu

来源：IEEE Journal of Quantum Electronics, 2008, 44(5-6): 515-519.

DOI：10.1109/JQE.2008.917966

• fiber laser
• coherent combining
• mutual injection-locking

In this paper, mutual injection-locking and coherent combining are demonstrated with two individual erbium-doped fiber lasers that were coupled by two fiber splitters. Mutual injection-locking theory of two lasers is analyzed. In the free-running state, the far-field beam profile is a simple intensity superposition, as expected of two incoherent beams. Under mutual injection-locking, interference fringes with high contrast ratio are obtained, and the two fiber lasers lase at the same wavelength with a stable output power. We have found that the two fiber lasers are always in out-of-phase mode, which is consistent with theoretical analysis. Coherent beam combining by mutual injection-locking is realized without the need for length or amplitude control. This method can be easily scaled to combine more beams.

• 出版日期2008-6
• 单位中国人民解放军国防科学技术大学