Yulong Yang

2 months ago | nature.com | X. Yao |Yulong Yang |Xiaosong Ma |Zhongjin Lin |Yuntao Zhu |Wei Ke | +3 more

Real-time measurement of optical frequency variations (OFVs) is crucial for various applications including laser frequency control, optical computing, and optical sensing. Traditional devices, though accurate, are often too large, slow, and costly. Here we present a photonic integrated circuit (PIC) chip, utilizing the sine-cosine encoder principle, for high-speed and high-resolution real-time OFV measurement. Fabricated on a thin film lithium niobate (TFLN) platform, this chip-sized optical frequency detector (OFD) (5.5 mm × 2.7 mm) achieves a speed of up to 2500 THz/s and a resolution as fine as 2 MHz over a range exceeding 160 nm. Our robust algorithm overcomes the device imperfections and ensures precise quantification of OFV parameters. As a practical demonstration, the PIC OFD surpasses existing fiber Bragg grating (FBG) interrogators in sensitivity and speed for strain and vibration measurements. This work opens new avenues for on-chip OFV detection and offers significant potential for diverse applications involving OFV measurement. The authors showcase a photonic integrated circuit chip for fast optical frequency variation measurement, fabricated with thin-film lithium niobate, with a size of 5.5 mm × 2.7 mm, a speed up to 2500 THz/s, a resolution of 2 MHz, and a range of 160 nm.

Mar 25, 2025 | mdpi.com | Yulong Yang |Songyuan Li |Nan Zhang |Zhongwen Yan

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Jan 31, 2025 | dx.doi.org | Xinyi Zhang |Yulong Yang |Xiao Kong

Apr 26, 2024 | mdpi.com | Yulong Yang |Jialin Zhang |Tao Chen

All articles published by MDPI are made immediately available worldwide under an open access license. No specialpermission is required to reuse all or part of the article published by MDPI, including figures and tables. Forarticles published under an open access Creative Common CC BY license, any part of the article may be reused withoutpermission provided that the original article is clearly cited. For more information, please refer tohttps://www.mdpi.com/openaccess.

Apr 9, 2024 | mdpi.com | Yulong Yang |Zhiwei Zhang

1. IntroductionMicrogrids are an important part of smart grid development, which have received more and more attention due to their environmental friendliness and flexible operation modes. Many scholars have studied the energy distribution of microgrids; reference [1] proposes a two-tier robust capacity planning model for PV-Wind-Storage-Diesel, considering wind uncertainty and standby demand scenarios.