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Design of Thermo-Optic Variable Optical Attenuator Based on Quartz Substrate 被引量:1
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作者 Hongqing Dai Junming An +10 位作者 Liangliang Wang Yue Wang Liyao Zhang Jiashun Zhang Hongjie Wang Pan Pan Xiaoguang Zhang Ruidan Liu Jianguang Li yuanda wu Xiongwei Hu 《Optics and Photonics Journal》 2013年第2期158-161,共4页
In this paper, we designed a thermo-optic variable optical attenuator (VOA) based on quartz substrate, which consists of a Mach-Zehnder interferometer (MZI) and a thin film heater above the phase-modulation arm. The t... In this paper, we designed a thermo-optic variable optical attenuator (VOA) based on quartz substrate, which consists of a Mach-Zehnder interferometer (MZI) and a thin film heater above the phase-modulation arm. The transmission properties of the waveguide and attenuation characteristics of the device have been simulated by beam propagation method (BPM), and the simulated results illustrated that the designed VOA had good performance. 展开更多
关键词 VOA MZI Thermo-optic QUARTZ SUBSTRATE
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Multi-functional optical fiber sensor system based on a dense wavelength division multiplexer
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作者 Yue-Xin Yin Zhifa wu +4 位作者 Siwen Sun Liang Tian Xibin Wang yuanda wu Daming Zhang 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第7期222-224,共3页
We propose a novel and efficient multi-functional optical fiber sensor system based on a dense wavelength division multiplexer(DWDM).This system consists of an optical fiber temperature sensor, an optical fiber strain... We propose a novel and efficient multi-functional optical fiber sensor system based on a dense wavelength division multiplexer(DWDM).This system consists of an optical fiber temperature sensor, an optical fiber strain sensor, and a 48-channel DWDM.This system can monitor temperature and strain changes at the same time.The ranges of these two sensors are from-20℃ to 100℃ and from-1000 με to 2000 με, respectively.The sensitivities of the temperature sensor and strain sensor are 0.03572 nm/℃ and 0.03808 nm/N, respectively.With the aid of a broadband source and spectrometer,different kinds and ranges of parameters in the environment can be monitored by using suitable sensors. 展开更多
关键词 DENSE wavelength DIVISION multiplexer(DWDM) planar LIGHTWAVE circuit multi-functional SENSOR optical fiber SENSOR system
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4 × 20 GHz silica-based AWG hybrid integrated receiver optical sub-assemblies 被引量:8
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作者 Chaoyi Li Junming An +6 位作者 Jiashun Zhang Liangliang Wang Jianguang Li Yue Wang Xiaojie Yin Hongjie Wang yuanda wu 《Chinese Optics Letters》 SCIE EI CAS CSCD 2018年第6期29-33,共5页
Both the 4 × 20 GHz coarse wavelength division multiplexing and LAN-WDM receiver optical sub-assemblies(ROSAs) were developed. The ROSA package was hybrid integrated with a planar lightwave circuit arrayed wave... Both the 4 × 20 GHz coarse wavelength division multiplexing and LAN-WDM receiver optical sub-assemblies(ROSAs) were developed. The ROSA package was hybrid integrated with a planar lightwave circuit arrayed waveguide grating(AWG) with 2% refractive index difference and a four-channel top-illuminated positive-intrinsicnegative photodetector(PD) array. The output waveguides of the AWG were designed in a multimode structure to provide flat-top optical spectra, and their end facet was angle-polished to form a total internal reflection interface to realize vertical coupling with a PD array. The maximum responsivity of ROSA was about 0.4 A/W, and its 3 dB bandwidth of frequency response was up to 20 GHz for each transmission lane. The hybrid integrated ROSA would be a cost-effective and easy-assembling solution for 100 Gb E data center interconnections. 展开更多
关键词 WDM AWG GHz silica-based AWG hybrid integrated receiver optical sub-assemblies LAN
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Interference at the single-photon level based on silica photonics robust against channel disturbance 被引量:2
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作者 XIAO LI MEIZHEN REN +6 位作者 JIASHUN ZHANG LIANGLIANG WANG WEI CHEN YUE WANG XIAOJIE YIN yuanda wu JUNMING AN 《Photonics Research》 SCIE EI CAS CSCD 2021年第2期222-228,共7页
Quantum key distribution(QKD) provides a solution for communication of unconditional security. However,the quantum channel disturbance in the field severely increases the quantum bit-error rate, degrading the performa... Quantum key distribution(QKD) provides a solution for communication of unconditional security. However,the quantum channel disturbance in the field severely increases the quantum bit-error rate, degrading the performance of a QKD system. Here we present a setup comprising silica planar light wave circuits(PLCs), which is robust against the channel polarization disturbance. Our PLCs are based on the asymmetric Mach–Zehnder interferometer(AMZI), integrated with a tunable power splitter and thermo-optic phase modulators. The polarization characteristics of the AMZI PLC are investigated by a novel pulse self-interfering method to determine the operation temperature of implementing polarization insensitivity. Over a 20 km fiber channel with 30 Hz polarization scrambling, our time-bin phase-encoding QKD setup is characterized with an interference fringe visibility of 98.72%. The extinction ratio for the phase states is kept between 18 and 21 d B for 6 h without active phase correction. 展开更多
关键词 polarization channel INTERFEROMETER
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