齐鲁工业大学(山东省科学院) 激光研究所,济南 250104
针对地面成熟三相流相含率测量传感器无法适应井下高温高压腐蚀的复杂环境,现有井下测量设备复杂,需要多种传感器和探头联合才能实现三相流相含率测量的问题,设计了一种光纤探针传感器。以蓝宝石作为光纤探针的前端敏感材料,利用气相和液相对光的折射率不同,通过检测探针反射光的光强来分辨光纤探针处于气相还是液相。通过检测经探针耦合进光纤的荧光光强分辨水相还是油相,从而实现单一探针传感器对油井内油相、水相、气相三相相含率的测量。
光纤传感 光纤探针 三相流 相含率 optical sensing and sensors optical fiber probe three-phase flow phase holdup
1 南华大学电气工程学院超快微纳技术与激光先进制造湖南省重点实验室,湖南 衡阳 421001
2 南华大学机械工程学院,湖南 衡阳 421001
数值研究了由同心C3型孔和圆环孔单元结构组成的复合超表面在近红外波段内的表面等离子体三重法诺共振效应与光学传感现象。研究结果表明,通过改变C3单元结构的对称性破缺不仅能够诱导产生可调的多重法诺共振效应,还能构建基于该效应的自参考光学传感。此外,通过改变圆环单元结构的内半径能够实现基于法诺凹陷深度的辐射监测传感。该研究为设计紧凑、可调谐的法诺共振光子器件提供了新的视角,同时可将周期性亚波长金属纳米结构扩展至生物传感和光通信领域的相关应用。
光电子学 表面等离子体光子学 表面等离子体 光学传感和传感器 激光与光电子学进展
2023, 60(9): 0925001
光子学报
2021, 50(10): 1024001
1 电子科技大学光纤传感与通信教育部重点实验室,四川 成都 611731
2 电子科技大学信息地学研究中心,四川 成都 611731
3 中国工程物理研究院激光聚变研究中心,四川 绵阳 621900
4 之江实验室光纤传感研究中心,浙江 杭州 311121
基于光纤瑞利散射的相位敏感光时域反射仪(Φ-OTDR),具有对环境变化敏感、响应速度快等特点,是分布式光纤传感领域最重要的分支之一。然而,Φ-OTDR使用的高相干探测光波在散射过程中会不可避免地出现干涉衰落效应,相应位置会成为传感的盲区。此现象是多年来本领域的关注重点之一。本文首先简述了干涉衰落的产生机理和数学特征;然后,系统地介绍了Φ-OTDR的典型传感机制,以及干涉衰落对传感信号解调造成的影响;随后,全面地回顾了Φ-OTDR抗干涉衰落技术的研究历程;最后,对Φ-OTDR的未来发展进行了探讨。
光纤光学 光纤传感 瑞利散射 光时域反射仪 相位测量 激光与光电子学进展
2021, 58(13): 1306008
1 中北大学前沿交叉科学研究院, 山西 太原 030051
2 中北大学电子测试技术国防重点实验室, 山西 太原 030051
3 中北大学山西省光电信息与仪器工程技术研究中心, 山西 太原 030051
利用波片进行同步相位延迟,将波片与偏振分光棱镜相结合获得四路相位差为90°的正弦信号,从而将衍射光栅位移传感器的量程范围提升到激光相干长度的二分之一。对两路相位差为180°的信号进行差分处理,可有效避免激光功率抖动、背景光干扰、运放温度漂移等因素带来的影响。最后利用细分插值电路对光路的输出信号构建反正切函数,实现了正弦函数的非线性模/数转换及2.54 nm的位移分辨率。这种具有高分辨率、大量程的位移传感器未来将进一步推动自动化机械设备、电子制造业以及工业智能领域的快速发展。
光栅 位移检测 分辨率 光学传感与传感器
1 中国科学院半导体研究所 半导体集成技术工程研究中心, 北京 100083
2 中国科学院半导体研究所 材料与光电研究中心, 北京 100083
3 中国科学院大学 材料科学与光电技术学院, 北京 100049
4 中国科学院大学 微电子学院, 北京 100049
在谐振式集成光学陀螺系统中, 相位调制技术被广泛用于检测陀螺旋转信号。本文详细介绍了近几年来国内外学者为提高陀螺精度、抑制陀螺噪声所提出的相位调制技术。文章首先从理论上分析了谐振环中的背散射噪声, 发现载波抑制是抑制背散射噪声的关键因素。然后, 详细介绍了近几年来为提高陀螺精度而提出的两类相位调制技术, 分别是单相位调制技术和双相位调制技术, 并分析比较了其技术原理、噪声抑制能力以及系统的鲁棒性和复杂度。新型的边带锁定技术可以有效抑制陀螺中的背散射噪声。最后通过总结这些相位调制技术的优缺点发现, 在陀螺系统中除了需要借助于相位调制技术抑制背反射噪声外, 提高对其他类型噪声的抑制是集成光学陀螺性能进一步提高的关键。
陀螺仪 相位调制 光学传感和传感器 谐振器 gyroscopes phase modulation optical sensing and sensors resonators
Author Affiliations
Abstract
College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China
Ho3+/Yb3+: BaMoO4 phosphors with different concentrations were fabricated by a gel combustion method. The upconversion (UC) luminescence, intrinsic optical bistability, and the corresponding mechanisms were reported for the present system. The optical thermometric properties based on red (5F5→5I8) and green (5F4/5S2→5I8) emissions were studied. The sensing sensitivities could be tuned by manipulating the cooperative energy transfer process. The highest absolute sensitivity was 99 × 10 4 K 1 at 573 K, which is larger than that of many previous UC materials.
160.5690 Rare-earth-doped materials 120.6780 Temperature 280.4788 Optical sensing and sensors Chinese Optics Letters
2019, 17(11): 111601
Author Affiliations
Abstract
1 Key Laboratory of Advanced Transducers and Intelligent Control System, Ministry of Education and Shanxi Province, Taiyuan 030024, China
2 College of Physics & Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China
We propose and experimentally demonstrate a novel Raman-based distributed fiber-optics temperature sensor (RDTS) for improving the temperature measurement accuracy and engineering applicability. The proposed method is based on double-ended demodulation with a reference temperature and dynamic dispersion difference compensation method, which can suppress the effect of local external physics perturbation and intermodal dispersion on temperature demodulation results. Moreover, the system can omit the pre-calibration process by using the reference temperature before the temperature measurement. The experimental results of dispersion compensation indicate that the temperature accuracy optimizes from 5.6°C to 1.2°C, and the temperature uncertainty decreases from 16.8°C to 2.4°C. Moreover, the double-ended configuration can automatically compensate the local external physics perturbation of the sensing fiber, which exhibits a distinctive improvement.
060.2370 Fiber optics sensors 120.5820 Scattering measurements 280.4788 Optical sensing and sensors 290.5860 Scattering, Raman Chinese Optics Letters
2019, 17(7): 070602
Author Affiliations
Abstract
1 National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan 430070, China
2 School of Information Engineering, Wuhan University of Technology, Wuhan 430070, China
Using theoretical simulations for optical fiber surface plasmon resonance (SPR) sensors and prism-based SPR sensors coated with negative permittivity material (NPM), we investigated the effect of the permittivity of NPM on the transmitted spectrum of optical fiber SPR sensors and the reflected spectrum of prism-based SPR sensors and then obtained optimum permittivity of the NPM, which can excite the sharpest SPR spectrum in the white light region (400–900 nm).
280.4788 Optical sensing and sensors 240.6680 Surface plasmons Chinese Optics Letters
2019, 17(4): 042801
Author Affiliations
Abstract
1 Photonics Research Group, Ghent University-IMEC, Technologiepark-Zwijnaarde 15, B-9052 Ghent, Belgium
2 Center for Nano- and Biophotonics (NB-Photonics), Ghent University, B-9052 Ghent, Belgium
3 Walter Schottky Institut, Technische Universität München, Am Coulombwall 4, 85748 Garching, Germany
4 IMEC, Kapeldreef 75, Leuven B-3001, Belgium
Heterogeneously integrating III-V materials on silicon photonic integrated circuits has emerged as a promising approach to make advanced laser sources for optical communication and sensing applications. Tunable semiconductor lasers operating in the 2–2.5 μm range are of great interest for industrial and medical applications since many gases (e.g., CO2, CO, CH4) and biomolecules (such as blood glucose) have strong absorption features in this wavelength region. The development of integrated tunable laser sources in this wavelength range enables low-cost and miniature spectroscopic sensors. Here we report heterogeneously integrated widely tunable III-V-on-silicon Vernier lasers using two silicon microring resonators as the wavelength tuning components. The laser has a wavelength tuning range of more than 40 nm near 2.35 μm. By combining two lasers with different distributed Bragg reflectors, a tuning range of more than 70 nm is achieved. Over the whole tuning range, the side-mode suppression ratio is higher than 35 dB. As a proof-of-principle, this III-V-on-silicon Vernier laser is used to measure the absorption lines of CO. The measurement results match very well with the high-resolution transmission molecular absorption (HITRAN) database and indicate that this laser is suitable for broadband spectroscopy.
Integrated optics devices Lasers, tunable Lasers, ring Optical sensing and sensors Photonics Research
2018, 6(9): 09000858