利用堆积法制作出Nd掺杂的磷酸盐玻璃双芯光纤(TCF)。结合管棒法，设计一种能够任意调节芯径与芯间距比例的制备方法。激光实验采用808 nm激光二极管(LD)作为抽运源，以长为6 cm，外径为620 μm的TCF作为增益介质，宽带高反双色镜和TCF另一端的菲涅耳反射形成的F-P腔作为激光谐振腔。抽运功率大于阈值时，CCD观察到清晰的远场干涉条纹，表明得到自锁相激光输出。激光最大输出功率达到52 mW，对应斜率效率为27.1%，并研究了不同抽运功率时，TCF激光的光谱性能。

Nd-doped phosphate glass twin-core fiber (TCF) is prepared by stack-and-draw method. By combining with rod-in-tube technical, a novel design to produce TCF with a various ratio of core diameter to their separation is obtained. The TCF laser employs an 808 nm laser diode (LD) as pump source, a phosphate TCF with a length of 6 cm and a diameter of 620 μm is gain medium, and a resonant cavity is formed by a broadband high reflector and Fresnel reflection provided by perpendicular cleaved end of the active TCF. Above laser threshold, clear and stable interference strips are observed by CCD in far field, showing that TCF laser operates in self-phase-locking. A maximal output power of 52 mW and a slope efficiency of 27.1% with respect to absorbed pump power are obtained. Characteristics of the TCF laser spectra at different output power are also investigated.