2025
article
OpenAlex
Yannong Luo, Meiyan Wu, Bigeng Chen, Shaoliang Yu et autres
Polarization diversity grating couplers (PDGCs) are fundamental components in photonic integrated circuits for polarization manipulation or multiplexing. However, the polarization dependent loss (PDL) is inherent in off-vertical fiber coupling. Additionally, there is an urgent demand for PDGCs with surface-normal emission to interface …
cn
(code pays fourni par la source)
2024
article
OpenAlex
Rui Ma, Zijun Huang, Shengqian Gao, Jingyi Wang et autres
Photonics integration of an optoelectronic oscillator (OEO) on a chip is attractive for fabricating low cost, compact, low power consumption, and highly reliable microwave sources, which has been demonstrated recently in silicon on insulator (SOI) and indium phosphide (InP) platforms at X-band …
cn, us
(code pays fourni par la source)
2024
conference-paper
OpenAlex
Renyou Ge, Bigeng Chen, Shaoliang Yu, Yannong Luo et autres
We demonstrate a sub-kHz-linewidth laser on LNOI platform utilizing long delay and narrowband filtering. Lasing with high side mode suppression ratio above 60dB, wide tuning range of 80nm, and narrow linewidth of 270Hz are achieved.
cn
(code pays fourni par la source)
2023
conference-paper
OpenAlex
Renyou Ge, Shengqian Gao, Meiyan Wu, Ping Chen et autres
We propose low polarization-dependent-loss (PDL) two-dimensional grating couplers (2D GC) on SOI platform, with perfectly vertical fiber-chip coupling, using inverse design method. Simulation results show that −3.17 dB (−1.90 dB) and −2.10 dB (−1.00 dB) of coupling efficiency can be achieved for …
cn
(code pays fourni par la source)
Accès ouvert
2022
article
OpenAlex
Xiaoping Cao, Nan Zhou, Shuang Zheng, Shengqian Gao et autres
Abstract Optical vortices carrying orbital angular momentum (OAM) have recently attracted increasing interest for providing an additional degree of freedom for capacity scaling in optical communications. The optical vortex generator is an essential component to facilitate OAM‐enabled optical communications. Traditional devices face …
cn
(code pays fourni par la source)
Accès ouvert
2022
article
OpenAlex
Xiaoyue Liu, Shengqian Gao, Chi Zhang, Ying Jie Pan et autres
Thin-film lithium niobate is a promising material platform for integrated nonlinear photonics, due to its high refractive index contrast with the excellent optical properties. However, the high refractive index contrast and correspondingly small mode field diameter limit the attainable coupling between the …
cn
(code pays fourni par la source)
2022
article
OpenAlex
Jun Liu, Shuang Zheng, Shi Chen, Long Zhu et autres
Photon dimension mapping provides an efficient way to learn from each other's strengths to offset their own weaknesses in a variety of applications. By mapping the conventional amplitude modulation to spatial mode modulation and employing an integrated orbital angular momentum (OAM) mode …
cn
(code pays fourni par la source)
2022
conference-paper
OpenAlex
Mengyue Xu, Shengqian Gao, Heyun Tan, Xinlun Cai
We demonstrate an O-band substrate-removed thin-film lithium niobate modulator with a low microwave loss of 0.24 dB cm−1 GHz−1/2. The device features a 1-V half-wave voltage and 1.4 dB EO response roll-off at 50 GHz.
cn
(code pays fourni par la source)
Accès ouvert
2021
article
OpenAlex
Shihao Sun, Mengyue Xu, Mingbo He, Shengqian Gao et autres
Optical modulators were, are, and will continue to be the underpinning devices for optical transceivers at all levels of the optical networks. Recently, heterogeneously integrated silicon and lithium niobate (Si/LN) optical modulators have demonstrated attractive overall performance in terms of optical loss, …
cn
(code pays fourni par la source)
2021
conference-paper
OpenAlex
Shengqian Gao, Lifeng Chen, Xinlun Cai
We demonstrate a CMOS compatible cantilever edge coupler design realizing efficient edge coupling for lithium niobate on insulator platform, experimental results show 1.7dB loss per facet.
cn
(code pays fourni par la source)
2020
article
OpenAlex
Renyou Ge, Yannong Luo, Shengqian Gao, Ya Ping Han et autres
We demonstrate a high-performance reconfigurable bandpass filter implemented by cascaded Sagnac loop mirror (SLM)-based coupled resonator optical waveguides (CROWs) on the silicon-on-insulator platform. By dynamic thermal tuning of the reflectivity in each SLM, the proposed filter can achieve simultaneous 3 dB bandwidth …
cn
(code pays fourni par la source)
2020
article
OpenAlex
Shihao Sun, Mingbo He, Mengyue Xu, Shengqian Gao et autres
Hybrid Lithium Niobate (LN) and Silicon photonic (SiPh) integration platform has emerged as a promising candidate to combine the scalability of silicon photonics with the excellent modulation performance of LN. Mach-Zehnder modulators (MZMs) based on this platform exhibit outstanding performance with low …
cn
(code pays fourni par la source)