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Ultra-Low Anti-Reflection (AR) Coating for High-Power External Cavity Diode Lasers (ECLs)

机译:适用于大功率外部腔二极管激光器(ECL)的超低抗反射(AR)涂层

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Frequency tunable transmitters such as external cavity diode lasers (ECL) are key to the incipient next generation of optical telecommunications networks. Ultra-low anti-reflection (AR) coating on one facet of a laser diode (gain medium) in an ECL enables the required combination of high power, wide tuning range, and spectral purity. With an optimized design and careful deposition process control, such high quality coatings may be obtained with conventional optical coating materials such TiO_2, Ta_2O_5, ZnS, SiO_2, SiO, MgF_2. In this paper, we discuss design requirements, deposition methods, equipment compatibility, and film thickness control capability necessary to achieve a reflectivity of ≤ 5x10~(-4) over the a wavelength range that spans both the C and L bands.
机译:诸如外腔二极管激光器(ECL)之类的频率可调发射机是下一代光通信网络的关键。 ECL的激光二极管(增益介质)的一个小面上具有超低抗反射(AR)涂层,可实现高功率,宽调谐范围和光谱纯度的所需组合。通过优化的设计和仔细的沉积过程控制,可以使用常规的光学涂层材料(例如TiO_2,Ta_2O_5,ZnS,SiO_2,SiO,MgF_2)获得这种高质量的涂层。在本文中,我们讨论了在跨越C和L波段的波长范围内实现≤5x10〜(-4)的反射率所必需的设计要求,沉积方法,设备兼容性以及膜厚度控制能力。

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