Femtosecond Laser Inscription of Low Insertion Loss Waveguides in $Z$-Cut Lithium Niobate
Femtosecond Laser Inscription of Low Insertion Loss Waveguides in $Z$-Cut Lithium Niobate
复制标题
DOI：
10.1109/lpt.2007.897534
复制
发表时间：
2007-06
影响因子：
2.6
通讯作者：
H. Bookey;Robert R. Thomson;N. Psaila;Ajoy K. Kar;N. Chiodo;Roberto Osellame;Giulio Cerullo
中科院分区：
文献类型：
--
作者：
H. Bookey;Robert R. Thomson;N. Psaila;Ajoy K. Kar;N. Chiodo;Roberto Osellame;Giulio Cerullo
采用飞秒激光刻模技术在Z切钛酸锂中制备了低插入损耗波导。为了制造一个既表现出低的传播和耦合损耗的波导，我们使用了多扫描制造技术来控制波导横截面的大小。当直接耦合到Corning SMF-28光纤时，测量到18 mm长的波导在1550 nm处的最小插入损耗仅为3.5 dB。在这3.5dB中，我们将2.1 dB归因于耦合损耗，1.1 dB归因于传播损耗，0.3 dB归因于菲涅耳反射
A low insertion loss waveguide is fabricated in z-cut lithium niobate using femtosecond laser waveguide inscription. To fabricate a waveguide exhibiting both low propagation and coupling losses, we used the multiscan fabrication technique to control the size of the waveguide cross section. A minimum insertion loss of only 3.5 dB at 1550 nm was measured for the 18-mm-long waveguide when directly coupled to Corning SMF-28 fibers. Of this 3.5dB, we attribute 2.1 dB to coupling losses, 1.1 dB to propagation losses, and 0.3 dB to Fresnel reflections