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- 实验方案
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Stable Multi-wavelength Thulium-doped All-fiber Laser Incorporating a Multi-cavity Fabry-Perot Filter
摘要： The present manuscript experimentally demonstrates multi-wavelength generation from a thulium-doped all-fiber laser by implementing a multi-cavity Fabry-Perot filter. The filter, with a composition that relies of several silica-air and air-silica interfaces, provide a spectral reflection response that allows the laser to be operated in single-, dual- or triple-wavelength emissions by simple and clear adjustment of the polarization state. In this way, the fiber laser is capable to operate over a broad range of wavelengths extending from 1844 to 1928 nm. In addition, dual-wavelength operations are also feasible in the 1844 and 1928 nm regions, exhibiting a mode spacing of 4.41 nm and 1.62 nm, respectively. Beside this, the laser is able to switch to a sextuple-wavelength operation regime in the 1885 nm region, maintaining a minimum wavelength spacing of 1.53 nm. The laser demonstrates high wavelength stability, with variations below 60 pm at all analyzed wavelengths, and a minimum peak power fluctuation of ±2.77 dB.
关键词： Fiber Laser,Fabry-Perot Filter,Thulium-doped Fiber,Multi-wavelength
更新于2025-09-16 10:30:52
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[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) - Simultaneous measurement of temperature and pressure based on Fabry Perot and Antiresonant mechanisms
摘要： A fiber-optic sensor for simultaneous measurement of temperature and pressure is proposed and experimentally demonstrated. The sensor is composed of a hollow core fiber (HCF) sandwiched by two segments of single mode fiber (SMF), in which Fabry-Perot interference (FPI) combined with antiresonant (AR) mechanism are applied to the simultaneous measurement of temperature and pressure. The reflection spectrum of the sensor is composed of a sinusoid caused by axial FPI and several resonant wavelengths induced by AR mechanism occurred in cladding of the HCF. Two kinds of mechanisms have different responses to temperature and pressure, so the proposed sensor can simultaneously measure the pressure and temperature without pressure-temperature cross-talk. The advantages of the proposed sensor including small size, compact structure, and easy fabrication.
关键词： Fabry-Perot,Temperature and pressure sensor,Antiresonant,Fiber optics
更新于2025-09-16 10:30:52
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Multimode dynamics and modeling of free-running and optically injected Fabry-Pérot quantum-dot lasers
摘要： We derive and apply a numerical model for the description of optically injected long-cavity Fabry-Pérot (FP) quantum-dot (QD) lasers, based on a multisection delay-algebraic-equation approach. In conjunction with experimental measurements, we characterize the multimode dynamics of the free-running laser as well as under external optical injection. We investigate the dynamics of the spatial hole burning (SHB) in the charge-carrier distribution, which is signi?cant in QD lasers and is furthermore a driving mechanism for the emergence of multimode dynamics. In the injected laser, we focus on the transition between the locking regions of neighboring FP modes, which could not be described using traditional multimode rate-equation models. For very strong injection, the individual locking cones are found to converge. For intermediate injection strength, an additional dynamic boundary between the unlocked states is found in a narrow dynamical region in between two neighboring locking cones. This region is characterized by a further unlocking of all laser modes. Furthermore, we ?nd the SHB to impose a threshold in the locking strength which must be overcome to lock a laser mode.
关键词： Fabry-Pérot quantum-dot lasers,multimode dynamics,locking regions,spatial hole burning,optical injection
更新于2025-09-16 10:30:52
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[IEEE IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society - Lisbon, Portugal (2019.10.14-2019.10.17)] IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society - Study of Vibration Sensing Technique Using Fabry-Pérot Interferometer with Optical Fibers
摘要： The measurement results of the vibration using optical fibers are presented. We detected the vibration of the measurement object by measuring reflected light using the optical fibers. A Fabry-Pérot interferometer in which an optical fiber and a metal mirror are opposed was configured as a displacement sensor. When vibration was imparted to the mirror, the fluctuation of the reflected power due to the increase and decrease of an air gap depending on the driving of the mirror could be measured. The optimum size of the gap between the optical fiber and the metal mirror was also investigated. In this report, it is stated that the Fabry-Pérot interferometer with optical fibers can be used as a displacement sensor for minute vibrations.
关键词： vibration sensing,Fabry-Pérot interferometer,optical fiber
更新于2025-09-16 10:30:52
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[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) - High-Sensitive All-Fiber Fabry-Perot Interferometer Gas Refractive Index Sensor Based on Lateral offset Splicing and Vernier Effect
摘要： Abstract—A high-sensitivity all-fiber Fabry-Perot interferometer (FPI) gas refractive index (RI) sensor based on lateral offset splicing and Vernier Effect is proposed. The sensing head consist of a reference FPI and a sensing FPI. A reference FPI and the sensing FPI is connected by two circulators. The sensing FPI is an open cavity made by lateral offset splicing of single mode fibers (SMFs), and the reference FPI is spliced by SMF and fiber tube. The Cascaded double-cavity produces a Vernier Effect and improves the sensitivity of gas RI. Experimental results show that the sensor has a high gas RI sensitivity of 16335.96 nm/RIU. The sensor has broad application prospects in gas composition detection, environmental monitoring, biosensors and other fields.
关键词： Fabry-Perot Interferometer,Fiber Optics Sensors,Vernier Effect,Gas Refractive Index Measurement
更新于2025-09-16 10:30:52
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[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) - Generating Ultra-Wideband LFM Waveforms with Large Time Duration Based on Frequency-sweeping Optoelectronic Oscillation
摘要： A frequency-sweeping OEO based on a low-loss microwave photonic filter with ultra-wide reflection bandwidth is proposed. Near-zero-dispersion single large-reflection-bandwidth mode fiber-Bragg-grating Fabry-Perot are used to enlarge time duration and bandwidth of LFM waveforms.
关键词： near-zero-dispersion,frequency-sweeping OEO,LFM Waveforms,fiber-Bragg-grating Fabry-Perot,single mode fiber
更新于2025-09-16 10:30:52
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[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 Fabry–Pérot Interferometers with Vernier Effect for Gas Pressure Measurement
摘要： A sensitivity enhanced gas pressure sensor with Vernier effect is proposed in this paper. The sensor is a cascade configuration which two Fabry–Pérot interferometers (FPIs) with different free spectrum range (FSR). Each Fabry–Pérot interferometer is fabricated by inserting a piece of hollow core fiber (HCF) in between two sections of single mode fiber (SMF). Femtosecond laser is applied for drilling an opening on the HCF of sensing FPI to make the air hole interact with outside environment, while the air hole of the reference FPI is kept closed. Gas pressure response is measured by monitoring the wavelength shift of the envelope extracted from the superimposed spectrum of the cascaded FPIs. Experimental results show that the sensitivity of the cascade configuration can attain -65.482nm/MPa, which is -13 times of single sensing FPI.
关键词： Vernier effect,Fabry–Pérot interferometer,gas pressure
更新于2025-09-16 10:30:52
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[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) - Study of temperature controlling of a solid Fabry–Pérot etalon
摘要： The solid Fabry–Pérot etalon is a widely used optical passive device in optical communications. However, the optical characteristics of Fabry–Pérot etalons are frequency locker and the absorption measurements in THz range. Experimental results showed that the wavelength drift of the etalon could reach 0.5 pm/℃. temperature dependent. In this study, we designed a temperature Insulation structure and employed a PID (Proportional–Integral–Derivative) controlling algorithm. The temperature influence on the etalon transmission spectrum is also discussed according to its temperature characteristics. By analyzing the experimental data, the effects of temperature control and non-temperature control on the Fabry–Pérot etalon were compared.
关键词： Fabry–Pérot etalons,PID,temperature control
更新于2025-09-16 10:30:52
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Radiation-resistant optical fiber Fabry-Perot interferometer used for high-temperature sensing
摘要： An optical fiber Fabry-Perot interferometer based on sapphire wafer for high-temperature sensing under Co-60 γ irradiation is designed. The sensing probe is composed by a thin sapphire wafer and a pure silica multi-mode fiber. In the experiment, the interferometer is exposed under the Co-60 γ irradiation with different irradiation time and absorbed dose rate. The irradiated optical fiber sensor underwent three temperature cycle tests up to 800°C and demonstrated excellent sensing performance at high temperature. The whole sensing system has the capability to survive in high temperature environment that surpasses 800°C. The interferometer can achieve the high sensitivity of 29.9 pm/oC at the wavelength around 1340 nm when the temperature is 800°C. The proposed sensor and sensing system has great potential to be applied under strong irradiation and high temperature.
关键词： optical fiber sensor,high temperature,sapphire wafer,radiation,Fabry-Perot interferometer
更新于2025-09-16 10:30:52
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A Multipurpose and Highly-Compact Plasmonic Filter based on Metal-Insulator-Metal Waveguides
摘要： A multipurpose and ultra-compact nanoplasmonic wavelength filter based on stub structure in a metal-insulator-metal (MIM) waveguide is suggested and numerically investigated. A novel approach of connecting two stepped-like apertures to both input and output ports is applied to form Fabry-Perot (FP) cavities, which enabled the structure to act as a dual band-pass filter at wavelengths 1310 nm and 1550 nm. It is shown that the variation in cavities’ length allows to realize a long-wavelength cutoff filter, and cutoff wavelength can be easily tuned by adjusting the length of the cavities. Furthermore, it is revealed that increasing the gap between the stepped-like apertures and the cavities provides a triple band-pass at telecom wavelengths, e.g. 1267.5nm, 1414.19 nm, and 1644.7 nm. The tunable broadband high-pass wavelength filter is then achieved while the lengths of stepped-like apertures and stub resonators are set to be identical. Finally, a tunable nearly perfect absorber can be obtained by varying the width of stub resonators. Therefore, because of functionality, size, as well as efficiency the proposed plasmonic filter may greatly contribute to miniaturization of next generation of photonic integrated circuits (PICs), and find applications in on-chip integration and wavelength-division multiplexing (WDM) in optical communication systems.
关键词： wavelength filtering devices,optical filters,Coupled resonators,photonic integrated circuits,surface plasmon polaritons,Fabry-Perot
更新于2025-09-16 10:30:52