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首页> 外文会议>Conference on Integrated Optics: Devices, Materials, and Technologies Ⅵ Jan 21-23, 2002 San Jose, USA >Diffused and buried waveguide made of crystalline silver halide and their potential as integrated optical elements for the middle infrared
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Diffused and buried waveguide made of crystalline silver halide and their potential as integrated optical elements for the middle infrared

机译：由结晶卤化银制成的扩散掩埋波导及其作为中红外集成光学元件的潜力

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During the last decade, there has been rapid progress in the development of integrated optical circuits, incorporating thin optical waveguides, for the Visible and Near IR (NIR) spectral ranges. In this work we extended the same concept to the Mid-IR (MIR) spectral range 3-30 microns. Towards this goal we developed diffused and strip buried planar waveguides based on silver halide crystals. Diffused planar waveguides were created by diffusion of Br~- ions into crystalline AgCl substrates, forming silver chloro-bromide (AgClBr) layers of higher refractive indices and different thickness of 65μm to 600μm. Strip buried planar waveguides were constructed from press-flattened silver chloro-bromide (AgClBr) fibers with different thickness, which were buried into an almost pure AgCl substrate. All the waveguides were in a thickness range of 60μm to 170μm. Using CO_2 laser we found that the transmission losses at 10.6μm were about 4 to 12dB/cm for the buried waveguides and about 4 to 16dB/cm for the diffused waveguides. We also formed and characterized curved waveguides on AgCl substrate. By using the planar waveguides as sensing elements for infrared ev anescent wave spectroscopy, we were able to detect 1% of glucose or 1% of alcohol in water. In conclusion, we demonstrate the feasibility of using AgClBr waveguides as integrated optical elements in the MIR.
机译：在过去的十年中，用于可见光和近红外（NIR）光谱范围的集成光学电路的发展迅速，并集成了细光波导。在这项工作中，我们将相同的概念扩展到3-30微米的中红外（MIR）光谱范围。为了实现这一目标，我们开发了基于卤化银晶体的扩散和带状埋入式平面波导。扩散平面波导是通过将Br-离子扩散到结晶的AgCl衬底中而形成的，从而形成了折射率更高，厚度在65μm至600μm之间的更高厚度的氯溴化银（AgClBr）层。带状埋入式平面波导由不同厚度的压制后的氯溴化银（AgClBr）纤维构成，并被埋入几乎纯净的AgCl衬底中。所有波导的厚度范围为60μm至170μm。使用CO_2激光器，我们发现在埋入式波导中10.6μm处的传输损耗约为4至12dB / cm，而对于扩散波导则为约4至16dB / cm。我们还在AgCl衬底上形成并表征了弯曲波导。通过将平面波导用作红外ev衰变波光谱学的传感元件，我们能够检测到水中1％的葡萄糖或1％的酒精。总之，我们证明了将AgClBr波导用作MIR中集成光学元件的可行性。

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