Binjie Wang, Yongheng Jiang, Li Chen, Liheng Wang, Pu Zhang, Mingrui Yuan, Huifu Xiao, Mei Xian Low, Aditya Dubey, Thach Giang Nguyen, Qinfen Hao, Guanghui Ren, Arnan Mitchell, Yonghui Tian
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High-efficiency lithium niobate optical mode switch using a mode-loop Mach-Zehnder interferometer.
Mode-division multiplexing is a common technology in photonic integrated circuits, which can combine various optical mode signals into one single channel such as a multimode waveguide to improve the communication system's capacity. Optical mode switch plays a critical role in mode-division multiplexing, which can switch the optical signal into different mode channels. Here, we propose and experimentally demonstrate a high-efficiency optical mode switch with a half-wave voltage length product (VπL) of about 1.83 V·cm, an extinction ratio of 22.9 dB, and a switching time below 48.3 ps, using mode-loop Mach-Zehnder interferometer structure in the lithium niobate on insulator platform. This optical mode switch has a potential application in supporting high-speed data transmission for on-chip mode-division-multiplexing systems.
期刊介绍：
The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community.
Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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