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利用三个2×2的光纤耦合器按一定规则联接成一个全光纤耦合环,该耦合环将三个独立的掺铒光纤激光器连成一个锁相阵列.由于耦合环的引入,锁相阵列的整体损耗减小,且三个单元激光器之间可以进行有效的能量相互注入耦合,进而实现阵列的锁相输出.实验中观察到的远场干涉图样和锁相前后的输出光谱均表明三路光纤激光器实现了相位锁定,当三路抽运源的功率均为100 mW时,获得了92 mW的稳定相干输出.
The three 2 × 2 fiber couplers are connected by a certain rule to form an all-fiber coupling loop, which connects three independent erbium-doped fiber lasers into a phase locking array. Due to the introduction of the coupling ring, The overall loss is reduced, and the three unit lasers can be effectively injected into each other between the energy coupling, and then the array to achieve the phase-locked output.Experiments observed in the far-field interference pattern and the output spectrum before and after the lock showed that three fiber The laser achieved a phase lock and achieved a 92 mW stable coherent output when the power of the three pumping sources was 100 mW each.