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首页> 外文期刊>Applied optics >Mode-field adaptor between large-mode-area fiber and single-mode fiber based on fiber tapering and thermally expanded core technique
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Mode-field adaptor between large-mode-area fiber and single-mode fiber based on fiber tapering and thermally expanded core technique

机译：基于光纤渐缩和热膨胀纤芯技术的大模区域光纤和单模光纤之间的模场适配器

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摘要

We report a method to fabricate a mode-field adaptor (MFA) for a large-mode-area (LMA) fiber and single-mode fibers (SMFs) based on fiber tapering and the thermally expanded core (TEC) technique. Through adiabatically tapering a LMA fiber by an oxygen-hydrogen flame, the mode-field diameter is decreased effectively with nearly no extra loss, which makes it possible to realize mode-field adaptation between the LMA fiber and SMFs. Both numerical calculation and experimental results show it is workable to realize fundamental mode propagation in LMA fiber and get a low insertion loss by this method. For a LMA fiber (d = 25 μm, NA = 0.06) and a SMF (d = 4 μm, NA = 0.2), a low loss with less than 0.4 dB has been obtained both in the forward and backward directions experimentally.
机译：我们报告了一种基于光纤渐缩和热膨胀纤芯（TEC）技术制造用于大模面积（LMA）光纤和单模光纤（SMF）的模场适配器（MFA）的方法。通过利用氢氧火焰使LMA纤维绝热地锥形化，模场直径得以有效减小而几乎没有额外的损失，这使得可以实现LMA光纤和SMF之间的模场匹配。数值计算和实验结果均表明，该方法可以实现LMA光纤中的基模传播，并具有较低的插入损耗。对于LMA光纤（d = 25μm，NA = 0.06）和SMF（d = 4μm，NA = 0.2），实验性地在向前和向后方向上都获得了小于0.4 dB的低损耗。

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