Søgeresultater - Bai-Ou Guan
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Potential for Simultaneous Measurement of Magnetic Field and Temperature Utilizing Fiber Taper Modal Interferometer and Magnetic Fluid
Udgivet 2016-01-01Få fuldtekstA single taper-based fiber modal interferometer with magnetic fluid integrated, which can have responses of dip wavelength and extinction ratio on the external magnetic field and temperature changes, is demonstrated. Within the magnetic field range from 50 to 100 Oe, the measured sensitivities are 8...
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Brillouin Scattering From Hybrid Acoustic Wave in a Microscaled Fiber for Gas Pressure Sensing
Udgivet 2017-01-01Få fuldtekstA gas pressure sensor based on Brillouin scattering in a microscaled fiber is experimentally demonstrated. The microscaled fiber with a diameter of 1.9 μm is drawn from a commercial single-mode fiber. A Brillouin spectrum with multipeak structure is observed due to the coupling between lo...
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Photonics Based Microwave Hybrid Coupler With Tunable Coupling Ratio and Phase Difference
Udgivet 2018-01-01Få fuldtekstA new microwave hybrid coupler that solves the problems of limited bandwidth and reconfigurability in conventional couplers, is presented. It is based on a bi-directional operating optical phase modulator and an optical signal processor to control the amplitude and phase of the phase modulated optic...
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Highly Sensitive Fiber Taper Interferometric Hydrogen Sensors
Udgivet 2016-01-01Få fuldtekstWe report on the implementation of fiber taper interferometric hydrogen sensors with high sensitivity and good reproducibility. The tapering process is carried out with a commercial fusion splicer by precisely controlling the pulling and feeding velocities, as well as arc strength. The taper can nat...
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Spatially Resolved Brillouin Spectral Hole Burning in PMF and SMF
Udgivet 2018-01-01Få fuldtekstWe observe the spectral hole burning effect in a polarization maintain fiber (PMF) and a single-mode fiber (SMF) through the interaction between a continuous wave (CW) beam and a high power pulse with two frequency components located around the Stokes and anti-Stokes frequencies of the CW beam. The...
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Broadband Photonic Microwave Signal Processor With Frequency Up/Down Conversion and Phase Shifting Capability
Udgivet 2018-01-01Få fuldtekstA new dual-function photonic microwave signal processing structure that has the ability to realize both frequency up/down conversion and RF/IF phase shifting, is presented. In the proposed signal processor, a dual-polarization dual-parallel Mach Zehnder modulator (DP-DPMZM) is...
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Photonics-Based Wideband Microwave Phase Shifter
Udgivet 2017-01-01Få fuldtekstA wideband microwave photonic phase shifter implemented based on a special dual-parallel Mach–Zehnder modulator (DP-MZM) consisting of two sub-MZMs and a polarization rotator is proposed and demonstrated. A microwave signal to be phase shifted is applied to the two sub-MZMs, via a 90&...
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Accelerated Ultraviolet Photoacoustic Microscopy Based on Optical Ultrasound Detection for Breast-Cancer Biopsy
Udgivet 2024-01-01Få fuldtekstBreast cancer often necessitates surgical interventions such as breast-conserving surgery or mastectomy. In these surgeries, sentinel lymph node (SLN) samples are often excised for histopathological examination to ascertain the presence of cancer metastasis. Despite its importance, traditional hemat...
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