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Fabricating Lensed Fiber Using a Novel Polishing Method

2009; ASM International; Volume: 131; Issue: 4 Linguagem: Inglês

10.1115/1.3168441

1528-8935

Yih-Tun Tseng, Jhong-Bin Huang, Wei-Jyun Su,

Optical Systems and Laser Technology

In optical communication systems, 980 nm high-power laser modules are applied for long-distance communication amplifiers. Since the mode field of the 980 nm laser diodes is different from single-mode fibers, coupling losses may occur. In order to improve this problem, lensed fibers have been used widely recently, such as lensed fiber employing quadrangular-pyramid-shaped fiber endface (QPSFE). The QPSFE can easily yield any elliptical microlens aspect ratio to match the far field of the high-power laser diode but the fiber endface must be polished and then spliced during present manufacturing process. It is a time-consuming task and the melting depth of the fiber endface is controlled with difficulty. This study develops a novel fiber endface polishing method for manufacturing the lensed fiber employing QPSFE. Using this new method, the coupling efficiency exceeds 70%.