The tunable wavelength emission of an erbium doped fiber laser using a Fabry–Perot interference filter based on a fiber micro-ball lens (MBL) with a spherical shape is experimentally demonstrated. The filter is formed at the tip of a single-mode fiber by controlled electric arc discharge. The filter consists of a fiber MBL with a radius of 152.7 m and a flat-convex mirror. A tunable single laser emission range of 1556.85–1569.72 nm is obtained when the mirror moves perpendicular to the fiber. Dual-wavelength laser emission with a separation of ∼12.9 nm corresponding to the free spectral range of interference modulation is obtained within the single laser wavelength tuning limits. The laser line exhibits full width at maximum half of 0.1 nm. The stability of the laser emission is also discussed. The use of a reliable tunable spectral filter for dual-wavelength emission and single tuning is demonstrated in the fiber laser’s design. The proposed spectral filter configuration can be useful in different research areas, such as the coherent development of light sources, optical communications, and optical instrumentation.

实验证明了使用基于球形球形微球透镜（MBL）的Fabry-Perot干涉滤光片，掺do光纤激光器的可调波长发射。过滤器通过受控的电弧放电形成在单模光纤的尖端。过滤器由半径为152.7的MBL光纤组成m和一个平凸镜。当反射镜垂直于光纤移动时，可获得的单个激光发射范围为1556.85–1569.72 nm。在单个激光波长调谐范围内，获得了与干扰调制的自由光谱范围相对应的〜12.9 nm间隔的双波长激光发射。激光线的最大宽度最大为0.1 nm。还讨论了激光发射的稳定性。光纤激光器的设计证明了可靠的可调谐光谱滤波器可用于双波长发射和单调谐。所提出的光谱滤波器配置可在不同的研究领域中使用，例如光源，光通信和光学仪器的一致开发。