Optics
·
2020
·Vol. 1
·期 2
·202-212
·
IF 0
Yang Ran,Peng Xiao,Yongkang Zhang,Deming Hu,Zhiyuan Xu,Lili Liang,Bai-Ou Guan
Operando and precisely probing aqueous pH is fundamentally demanded, both in chemical and biological areas. Conventional pH probes, subjected to the larger size, are probably unfit for application in some extreme scenarios, such as a trace amount of samples. In this paper, we have further developed the pH sensor that leverages the microfiber Bragg grating with an ultra-compact size down to an order of magnitude of 10−14m3. Using the electrostatic self-assembly layer-by-layer technique, the functional film consisting of sodium alginate, which harnesses a pH-dependent hygroscopicity, is immobilized on the fiber surface. Consequently, the alteration of aqueous pH could be quantitatively indicated by the wavelength shift of the grating resonance via the refractive index variation of the sensing film due to the water absorption or expulsion. The grating reflections involving fundamental mode and higher order mode exhibit the sensitivities of −72 pm/pH and −265 pm/pH, respectively. In addition, temperature compensation can be facilitated by the recording of the two reflections simultaneously. Furthermore, the modeling and simulation results predict the pivotal parameters of the configuration in sensitivity enhancement. The proposed proof-of-concept enriches the toolbox of pH sensor for catering to the need of detection in some extremely small spaces—for example, the living cells or the bio-tissues.Keywords:fiber optics;microfiber;Bragg grating;sodium alginate;electrostatic self-assembly;pH sensor
研究领域:
生物技术
·
化学工程
✓ 已验证
DOI
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yuqi Zhen,Xitao Tu,Jiajie Zhu,Yuanbiao Tong,Lufang Liu,Ni Yao,Pan Wang,Limin Tong,Lei Zhang
Fiber-tip sensors based on the Fabry–Perot interferometer (FPI) are one of the most widely used devices for temperature and pressure measurements in space-confined scenarios. However, the deposited metal films with a polycrystalline structure tend to form microcracks under strain, which can undermine the optical quality factor and thus sensing performance of these fiber-tip sensors. Here, we demonstrate an atomically smooth gold microflake (GMF)-enabled fiber-tip FPI sensor with a Q factor as high as 628. Benefiting from the high reflectivity and flexibility of GMFs and the elasticity of the PDMS spacer, the fiber-tip FPI can maintain stable sensing performance under large deformation. For temperature sensing, the fiber-tip sensor exhibits a linear response to the temperature in the range 28–40 °C with a sensitivity as high as 1.74 nm °C–1. To realize linear and sensitive pressure sensing, we design and fabricate a PDMS clamped-beam structure on the fiber tip using a soft lithography technique, achieving a sensitivity of 11.48 nm kPa–1. Moreover, simultaneous measurement of the temperature and pressure is also demonstrated using the wavelength demodulation method. The simple and cost-effective fabrication of the clamped beam and the transferable GMFs allow for the facile integration of high-quality FP cavities on fiber tips, opening new opportunities for developing optical sensors with miniaturized sizes.
研究领域:
光学传感
·
光纤光学
·
微传感器技术
·
材料科学
·
纳米光子学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2021
·
IF 3.407
Chunyu Zhao,Haiming Qiu,Haijin Chen,Xuehao Hu,Qianqing Yu,Zhenggang Lian,Jingwen Li,Hang Qu
In this paper, we proposed an in-fiber Mach-Zehnder temperature sensor based on a dual-core fiber (DCF) in which one core, working as the reference arm, is located in the center of fiber and the other core, working as the sensing arm, is suspended in an embedded fluidic channel partially filled with silicone oil. Temperature variations would mainly change the refractive index of the silicone oil and therefore the effective index of the guided modes in the suspended core, while the guided modes in the center core were barely affected. Phase difference between guided modes in the two cores would be accumulated along the DCF, thus shifting the interference spectrum of the sensor. Both experiments and numerical simulations were carried out to characterize the sensor. The spectrum shifts measured experimentally agreed well with the theoretical results. Experimental sensitivity of the DCF sensor filled with 33.5-cm-long silicone oil was found to be as high as −2.18 nm/°C, comparable to that of other interferometric sensors. The proposed sensor could be easily fabricated with good robustness and stability, which makes the sensor promising for applications such as environment and architecture monitoring.
研究领域:
光学传感器
·
光纤光学
·
温度传感
·
干涉测量
✓ 已验证
DOI
高影响因子
MEASUREMENT
·
2022
·
IF 5.131
Yalan Niu,Hanglin Lu,Li Yang,Laipeng Shao,Junhui Hu
A microfiber interferometer water hardness sensor is proposed, and its capabilities are demonstrated in an experiment. The sensor is fabricated by using a piece of microfiber with a diameter of 10.4 μm formed via the heating melt stretching technique. At this scale diameter, a strong evanescent field is generated on the surface of the microfiber, which is very sensitive to the external environmental parameters. Thus, water hardness can be detected by measuring the strength of the interaction between the evanescent field and the concentration of calcium ions (Ca 2+ ) in water. The experimental results show that the microfiber interferometer sensor can accurately detect water hardness. The maximum sensitivity obtained in the experiment is 0.395 nm/(100 mg/L). The proposed sensor exhibits the advantages of easy fabrication, simple structure, cost-effective, fast response and high sensitivity, and has the potential applications in the fields of medicine, biological, chemical, and environmental concentration monitoring.
研究领域:
光学传感器
·
环境监测
·
光纤光学
·
分析化学
·
传感技术
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2022
·Vol. 105
·期 5
·3291-3302
·
IF 4.186
Yan Sun,Juping Ma,Chongyun Shao,Xin Wang,Fei Yu,Meisong Liao,Lili Hu,Jonathan Knight
In this work, we revealed the possible mechanisms of the photodarkening in Pr 3+ ions singly doped and Pr 3+ /Ce 3+ co-doped silicate glasses and fibers induced by X-ray and 488-nm laser radiations and studied the role of Ce 3+ in increasing radiation resistance in Pr 3+ -doped silicate glasses and fibers. The absorption, emission, electron paramagnetic resonance (EPR), radiation induced attenuation spectra, and X-ray photoelectron spectroscopy (XPS) of Pr 3+ singly doped and Pr 3+ /Ce 3+ co-doped silicate glasses before and after X-ray radiation were measured and analyzed. The fluorescence intensity and photoinduced attenuation of Pr 3+ singly doped and Pr 3+ /Ce 3+ co-doped silicate fibers at visible wavelengths pumped by 488-nm laser were measured and analyzed. The influence of Ce 3+ ions co-doping on the spectroscopic properties of Pr 3+ ions as well as the radiation-induced defects in silicate glasses was studied. Results demonstrate that both X-ray and 488-nm laser radiations will induce photodamage in Pr 3+ ions-doped silicate glasses and fibers. Co-doping Ce 3+ (by up to 1 mol%) is efficient to suppress the darkening induced by both X-ray and 488-nm laser radiations without influence on the luminescence behavior of Pr 3+ ions in silicate glasses and fibers. Our studies demonstrate the promising potential of Pr 3+ /Ce 3+ co-doped silicate glasses for visible lasing applications.
研究领域:
光学材料
·
光子学
·
稀土掺杂玻璃
·
辐射效应
·
光纤光学
✓ 已验证
DOI
高影响因子
Advanced Materials Technologies
·
2023
·Vol. 8
·期 12
·2202042
·
IF 6.8
Ke Zhang,Jingfei Chen,Quan Dong,Tianxia Wei,Dazhao Wang,Xueliang Li,Xu Feng,Zhixue He,Jianrong Qiu,Shifeng Zhou
Bismuth(Bi)-doped photonic materials with broadband near-infrared luminescence can be used in applications such as high-capacity fiber communication, fiber laser, and biological imaging. The scalable fabrication of Bi-doped fibers with high dopant solubility, high optical activity, and broadband optical response still remains a significant challenge. In this study, the comprehensive studies on the physical, chemical, mechanical, and optical responses of a Bi-doped glass system are performed and a Bi-doped germanate multicomponent glass system is proposed to be the promising candidate. The deactivation mechanism of Bi in a glass matrix is investigated and prevented by controlling the fiber drawing. In addition, a Bi-doped multicomponent germanate glass fiber with a high level of Bi doping is successfully constructed. Finally, a principle compact fiber amplifier device is fabricated for broadband optical amplification. This device can be potentially used for increasing the capacity of telecommunication systems.
研究领域:
光学通信
·
光子学
·
材料科学
·
光纤光学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 6
·3769-3777
·
IF 3.5
Ke Zhang,Jingfei Chen,Quan Dong,Dianhao Hou,Hongwei Li,Tianxia Wei,Xueliang Li,Xu Feng,Shifeng Zhou
Bismuth (Bi)-doped glass and fiber materials exhibit excellent optical performance and have potential in fields such as fiber communication and tunable lasers. However, the preparation of Bi-doped glass and fiber with high optical activity is still confronted with huge challenges. This study proposes a germanium oxide hybridization strategy to enhance near-infrared emission in Bi-doped glass. In addition, by the systematical optimization of the optical response and processability of the glass system, Bi-doped glass fibers are successfully constructed. The constructed glass fibers have excellent optical performance, and the enhanced amplified spontaneous emission is realized. They show potentials for applications in broadband fiber amplifiers and tunable lasers.
研究领域:
光学材料
·
光子学
·
光纤光学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Shun Wang,Qiang Yu,Xu Wang,Cheng Jiang,Kun Guo,Hongpei Wang,Haiqin Deng,Jian Wu,Kai Zhang,Ziyang Zhang
Since its inception as the cornerstone of the ultrafast pulse laser, semiconductor saturable absorber mirrors (SESAMs) have attracted considerable interest. Meanwhile, low-dimensional (LD) materials based saturable absorbers (SAs) are gaining popularity in pulsed laser applications due to their high nonlinearity, strong light-matter interaction, and low cost. Here, high-quality LD-SAs have been created by transferring 2 H-TaS 2 onto gold mirrors and covered with plasma-enhanced chemical vapor deposition (PECVD) SiO 2 layers. The non-linear transmission of SiO 2 passivated TaS 2 -SAM was measured using a balanced dual-detector technology. The modulation depth and saturated intensity were ~8.4% and 0.86 MW·cm −2 . Based on the SiO 2 passivated TaS 2 -SAM, Q-switched and mode-locked Erbium-doped (Er 3+ -doped) fiber pulse lasers have been successfully achieved. Stable soliton pulses are obtained in erbium-doped fiber lasers (EDFLs) with pulse width of 1.8 ps, repetition rate of 3.4 MHz and a center wavelength of 1560.6 nm. Moreover, the mode-locking laser exhibited long-term stability with high signal-to-noise ratio of 63 dB. This study serves as a standard for low-dimensional materials research in photonics applications, and the results reveal that TaS 2 -SAM has a wide range of applications in multifunctional all-fiber lasers.
研究领域:
光子学
·
光学工程
·
超快激光
·
纳米材料
·
光纤光学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）