铌酸锂
材料科学
光电子学
薄膜
光子学
光学
纳米技术
物理
作者
Rebecca Cheng,Xinyi Ren,Christian Reimer,Matthew M. Yeh,Victoria Rosborough,Juergen Musolf,Leif Johansson,M. Zhang,Mengjie Yu,Marko Lončar
出处
期刊:Optics Letters
[The Optical Society]
日期:2024-06-14
卷期号:49 (12): 3504-3504
摘要
Stable pulse and flat-top frequency comb generation are an indispensable component of many photonic applications, from ranging to communications. Lithium niobate on insulator is an excellent electro-optic (EO) platform, exhibiting high modulation efficiency and low optical loss, making it a fitting candidate for pulse generation through electro-optic modulation of continuous-wave (CW) light, a commonly utilized method for generating ultrashort pulses. Here, we demonstrate an on-chip electro-optic comb generation module on thin-film lithium niobate (TFLN) consisting of a Mach–Zehnder interferometer (MZI) amplitude modulator (AM) and a cascaded phase modulator (PM) system driven by a single-electrode drive. We show that when operated in the correct regime, the lithium niobate chips can generate frequency combs with excellent spectral power flatness. In addition, we optically package one of the pulse generator chips via photonic wire bonding. The pulses generated by the photonic-wire-bonded device are compressed to 840 fs pulse duration using an optical fiber and show extremely stable operation.
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