- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
A high sensitivity optical fiber strain sensor based on hollow core tapering
摘要： An optical fiber strain sensor based on a Mach-Zehnder interferometer (MZI) is demonstrated experimentally. The sensor is fabricated by fusion splicing a tapered hollow core fiber (THCF) with a 500 μm taper region between two single mode fibers (SMFs). Tapering on the HCF increases the sensor’s strain sensitivity to 2.7 pm/με in a measurement range of 0 με to 2100 με, 1.5 times larger than that of all-fiber MZI strain sensors without tapered areas (approximately 1.8 pm/με). The experimental results show that the sensor has good stability and repeatability. This sensor has high strain sensitivity and low temperature sensitivity and can be used in environments with little temperature fluctuation.
关键词： Mach-Zehnder interferometer,Optical fiber sensor,Tapered hollow core fiber
更新于2025-09-23 15:19:57
-
On-chip single-mode CdS nanowire laser
摘要： By integrating a free-standing cadmium sulfide (CdS) nanowire onto a silicon nitride (SiN) photonic chip, we demonstrate a highly compact on-chip single-mode CdS nanowire laser. The mode selection is realized using a Mach-Zehnder interferometer (MZI) structure. When the pumping intensity exceeds the lasing threshold of 4.9 kW/cm2, on-chip single-mode lasing at ~518.9 nm is achieved with a linewidth of 0.1 nm and a side-mode suppression ratio of up to a factor of 20 (13 dB). The output of the nanowire laser is channelled into an on-chip SiN waveguide with high efficiency (up to 58%) by evanescent coupling, and the directional coupling ratio between the two output ports can be varied from 90 to 10% by predesigning the coupling length of the SiN waveguide. Our results open new opportunities for both nanowire photonic devices and on-chip light sources and may pave the way towards a new category of hybrid nanolasers for chip-integrated applications.
关键词： Mach-Zehnder interferometer,single-mode lasing,nanowire laser,on-chip nanophotonics,silicon nitride waveguide
更新于2025-09-23 15:19:57
-
Optical fiber temperature sensor based on a Mach-Zehnder interferometer with single-mode-thin-core-single-mode fiber structure
摘要： A Mach-Zehnder interferometer for measurement of temperature is proposed and experimentally demonstrated, which consists of two sections of single mode fiber (SMF) and a section of thin core fiber spliced between the two SMFs. The two welding areas are heated and stretched to improve the split and recombination of light. The wavelength of the resonant dip will shift when temperature varies due to the thermo-optic and thermal expansion effect. The experimental results show that a temperature sensitivity of 65 pm/○C with a linear correlation coefficient of 0.996 can be achieved in a temperature range from 25 ○C to 80 ○C. Due to its ease of manufacture, low cost, and high sensitivity, the fiber optic temperature sensor is suitable for temperature measurement applications.
关键词： single-mode-thin-core-single-mode fiber structure,Mach-Zehnder interferometer,Optical fiber temperature sensor
更新于2025-09-19 17:13:59
-
The implementation and data analysis of an interferometer for intense short pulse laser experiments
摘要： We present an interferometry setup and the detailed fringe analysis method for intense short pulse (SP) laser experiments. The interferometry scheme was re?ned through multiple campaigns to investigate the effects of pre-plasmas on energetic electrons at the Jupiter Laser Facility at Lawrence Livermore National Laboratory. The interferometer used a frequency doubled (λ = 0.527 μm) 0.5 ps long optical probe beam to measure the pre-plasma density, an invaluable parameter to better understand how varying pre-plasma conditions affect the characteristics of the energetic electrons. The hardware of the diagnostic, data analysis and example data are presented. The diagnostic setup and the analysis procedure can be employed for any other SP laser experiments and interferograms, respectively.
关键词： short pulse laser,optical interferometry,Mach–Zehnder interferometer,picosecond probe,plasma density
更新于2025-09-19 17:13:59
-
Characterize and optimize the four-wave mixing in dual-interferometer coupled silicon microrings
摘要： By designing and fabricating a series of dual-interferometer coupled silicon microrings, the coupling condition of the pump, signal, and idler beams can be engineered independently and then we carried out both the continuous-wave and pulse pumped four-wave mixing experiments to verify the dependence of conversion ef?ciency on the coupling conditions of the four interacting beams, respectively. Under the continuous-wave pump, the four-wave mixing ef?ciency gets maximized when both the pump and signal/idler beams are closely operated at the critical coupling point, while for the pulse pump case, the ef?ciency can be enhanced greatly when the pump and converted idler beams are all overcoupled. These experiment results agree well with our theoretical calculations. Our design provides a platform for explicitly characterizing the four-wave mixing under different pumping conditions, and offers a method to optimize the four-wave mixing, which will facilitate the development of on-chip all-optical signal processing with a higher ef?ciency or reduced pump power.
关键词： silicon resonators,four-wave mixing,Mach–Zehnder interferometer
更新于2025-09-19 17:13:59
-
Ultrafast Nano-scale Optical Switching in a Plasmonic Interferometer with Enhanced Tunability
摘要： An all-optical switch based on plasmonic metal–insulator–metal (MIM) waveguides and the Mach–Zehnder (MZ) interferometer is designed. In order to realize an all-optical and active switch, a nonlinear material with intensity-dependent refractive index is introduced in one arm. Other than studying a typical MZ structure, we also investigate the asymmetric case where unequal thicknesses and distances for MZ arms are proposed. The finite element method (FEM) with a refined triangle mesh is employed for simulations. Results for ON and OFF states are provided with or without employing the pump field. Investigation of the geometrical dispersion reveals tunability of the structure for specific frequencies in the terahertz region. Finally, we show that introducing asymmetric arms provides better tunability in the designed ultrafast nano-scale switch and suggests its potential applications in integrated optical circuits.
关键词： Nonlinear optical devices,Mach-Zehnder interferometer,Surface plasmon polaritons,Plasmonic switches
更新于2025-09-16 10:30:52
-
[IEEE 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Huangshan, China (2019.8.5-2019.8.8)] 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Temperature Sensor Based on Mach-Zehnder Interferometer with Corroded Photonic Crystal Fiber
摘要： A temperature sensor by using a corroded photonic crystal fiber (PCF) based on Mach-Zehnder interferometer (MZI) is proposed and experimentally demonstrated. It fabricated by sandwiching a corroded PCF between two standard single mode fibers (SMFs) with the original region of the air holes of the PCF transforming into a hexagonal ring air cavity. The proposed sensor is linearly responsive to temperature within the range from 25°C to 100°C, with the sensitivity of 2.9 pm/°C, which makes it a highly promising for practical high temperature monitoring application.
关键词： Photonic crystal fiber,Temperature,Mach-Zehnder interferometer
更新于2025-09-16 10:30:52
-
[IEEE 2019 10th International Conference on Computing, Communication and Networking Technologies (ICCCNT) - Kanpur, India (2019.7.6-2019.7.8)] 2019 10th International Conference on Computing, Communication and Networking Technologies (ICCCNT) - Electro-Optical Design and Modeling of Convolutional Code Encoder
摘要： Error detection using electro-optical methods has evolved as a new research domain in the recent years. They have proved to be more reliable than the conventional electronic methods. The presented paper describes the design and analysis of an electro-optical convolutional code encoder. The convolutional code has been long in use for the efficient detection of errors. The design has been proposed using Lithium Niobate based Mach-Zehnder Interferometer. The code bits are generated by modulo-2 addition of the input data in different patterns by the use of shift register and XOR gate. The design has successfully been tested using the beam propagation method. The calculated extinction ratio (24.82 dB), insertion loss (0.11 dB) and contrast ratio (23.26 dB) are meeting the desired values for the better performance of the device.
关键词： Mach Zehnder Interferometer,Convolution code,Lithium Niobate,Parity,Electro-optic
更新于2025-09-16 10:30:52
-
[IEEE 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Huangshan, China (2019.8.5-2019.8.8)] 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Strain Sensor Based on Mach-Zehnder Interferometers by Waist-enlarged Structure and Spherical Structure
摘要： Optical fiber sensors based on waist-enlarged structure and spherical structure were proposed for strain measurement. Their fabrication process and experimental results were compared. The strain sensitivities of the sensors based on the waist-enlarged structure and the spherical structure are -0.66pm/με and -1.28pm/με, respectively. It shows that the Mach-Zehnder sensor the waist-enlarged structure has the advantages of good repeatability and easy fabrication, and the Mach-Zehnder sensor based on the strain spherical measurement. structure has higher fabricated by sensitivity for
关键词： Strain measurement,Mach-Zehnder interferometer,Spherical-shape structure,Waist-enlarged structure
更新于2025-09-16 10:30:52
-
[IEEE 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Huangshan, China (2019.8.5-2019.8.8)] 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Cascaded TCF with WO <sub/>3</sub> film based Mach–Zehnder interferometer for hydrogen sensing
摘要： A hydrogen gas sensor based on cascaded TCF with WO3 film was demonstrated to monitoring the hydrogen concentration. By detecting spectral shifts, the proposed sensor showed a high sensitivity of 2.074444 dB/% under the hydrogen concentration of 0.00% to 1.32%.
关键词： Mach–Zehnder interferometer(MZI),Hydrogen sensing,TCF
更新于2025-09-16 10:30:52