Eyal O, Scharf V, Shalem S, Katzir A
Opt Lett. 1996 Aug 1;21(15):1147-9. doi: 10.1364/ol.21.001147.
A single-mode silver halide symmetric step-index planar waveguide for 10.6 microm is described. We fabricate the waveguide from extruded multimode silver halide fiber by pressing the fiber between metal plates while heating. The device is therefore automatically pigtailed to a fiber, which could ease the difficulties of coupling light into it. We achieved single-mode confinement by suitably adjusting the refractive index of the core and the cladding and by reducing the core thickness to 30 microm. The output radiation from the planar waveguide was measured to confirm single-mode confinement. Silver halide single-mode waveguides for the mid-infrared can be used to enhance sensitivity in fiber-optic evanescent-wave infrared spectroscopy measurements or for the development of mid-infrared single-mode lasers and interferometers.
描述了一种用于10.6微米的单模卤化银对称阶跃折射率平面波导。我们通过在加热时将多模卤化银光纤挤压在金属板之间来制造该波导。因此，该器件自动与光纤尾纤连接，这可以减轻将光耦合到其中的困难。我们通过适当地调整纤芯和包层的折射率，并将纤芯厚度减小到30微米来实现单模限制。测量了平面波导的输出辐射以确认单模限制。用于中红外的卤化银单模波导可用于提高光纤倏逝波红外光谱测量中的灵敏度，或用于开发中红外单模激光器和干涉仪。
