Hu Jinyao, Li Chijun, Guo Changjian, Lu Chao, Lau Alan Pak Tao, Chen Pengxin, Liu Liu
Opt Lett. 2021 Jun 15;46(12):2940-2943. doi: 10.1364/OL.426083.
The thin-film lithium niobate structure has been used recently to construct compact and high-performance electro-optical modulators. Due to the moderate electro-optical coefficient of the lithium niobate material, the device length of such a modulator is still long, a few centimeters usually. Here, a folded Mach-Zehnder interferometer based modulator on -cut thin-film lithium niobate is demonstrated. An effective poling procedure is developed to activate the device. The proposed modulator structure can shorten the device length without affecting its performance. The measured product of a fabricated and completely poled folded modulator is about 2.74⋅, and the 3 dB electro-optical bandwidth is about 55 GHz. They are close to those of a conventional Mach-Zehnder modulator with a straight modulation section.
最近，薄膜铌酸锂结构已被用于构建紧凑且高性能的电光调制器。由于铌酸锂材料的电光系数适中，这种调制器的器件长度仍然很长，通常为几厘米。在此，展示了一种基于 - 切割薄膜铌酸锂的折叠马赫 - 曾德尔干涉仪调制器。开发了一种有效的极化程序来激活该器件。所提出的调制器结构可以在不影响其性能的情况下缩短器件长度。制造并完全极化的折叠调制器的测量 乘积约为2.74⋅ ，3分贝电光带宽约为55吉赫兹。它们与具有直调制段的传统马赫 - 曾德尔调制器的性能相近。
