NKT Photonics A/S, Birkerø d, Denmark.
Opt Lett. 2012 Feb 15;37(4):452-4. doi: 10.1364/OL.37.000452.
We demonstrate efficient multimode (MM) to single-mode (SM) conversion in a 19-port photonic lantern with a 50 μm core MM delivery fiber. The photonic lantern can be used within the field of astrophotonics for coupling MM starlight to an ensemble of SM fibers in order to perform fiber-Bragg-grating-based spectral filtering. An MM delivery fiber spliced to the photonic lantern offers the advantage that the delivery fiber guides the light from the focal plane of the telescope to the splitter. Therefore, it is no longer necessary to have the splitter mounted directly in the focal plane of the telescope. The coupling loss from a 50 μm core MM fiber to an ensemble of 19 SM fibers and back to a 50 μm core MM fiber is below 1.1 dB.
我们在一个具有 50μm 芯多模（MM）输送光纤的 19 端口光子灯笼中演示了高效的多模（MM）到单模（SM）转换。该光子灯笼可用于天文光子学领域，用于将 MM 星光耦合到一组 SM 光纤中，以进行光纤布拉格光栅（FBG）的光谱滤波。与光子灯笼熔接的 MM 输送光纤具有将光从望远镜焦平面引导到分光器的优点。因此，不再需要将分光器直接安装在望远镜的焦平面上。从 50μm 芯 MM 光纤到 19 根 SM 光纤的耦合损耗再回到 50μm 芯 MM 光纤，损耗低于 1.1dB。
