The Experts below are selected from a list of 238404 Experts worldwide ranked by ideXlab platform
Jianping Chen - One of the best experts on this subject based on the ideXlab platform.
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Optical Power Monitoring with Ultrahigh Sensitivity in Silicon Waveguides and Ring Resonators
IEEE Photonics Journal, 2017Co-Authors: Linjie Zhou, Jianping ChenAbstract:We demonstrate Optical Power monitoring using a silicon resistor enabled by the surface and defect states-induced photoconductance effect. Ultrahigh Optical Power detection sensitivity of −40 dBm under a low AC drive voltage of 5 mV is obtained with the facilitation of a lock-in amplifier circuitry. The detection scheme is applied to monitor the resonances in single and coupled-ring resonators. Intracavity resonance spectrum is successfully measured at both the static and the thermal tuning conditions. The demonstration opens a compelling new way for nonintrusive on-chip Optical Power detection by exploiting doped silicon resistor-based thermooptic heaters.
Hua Wang - One of the best experts on this subject based on the ideXlab platform.
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An Optical Power Splitter With Variable Power Splitting Ratio
IEEE Photonics Technology Letters, 2011Co-Authors: Shaohua Tao, Bingchu Yang, Hui Xia, Hua WangAbstract:An Optical Power splitter based on two parallel and identical spot-size mode converters is proposed. The mode converters are used to couple light directly from a lensed single-mode fiber, and lights in the mode converters are further separated with respective connecting s-bend waveguides. Factors affecting coupling efficiency and Power splitting ratio of the device have been investigated with simulations. An Optical Power splitter based on silicon-on-insulator has been fabricated and Optically characterized. Both the simulations and experiments show that the splitter can achieve variable Optical Power splitting ratio and have very low excess loss. The splitter can also be inversely used to combine two beams from a photonic integrated circuit into a fiber.
Linjie Zhou - One of the best experts on this subject based on the ideXlab platform.
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Optical Power Monitoring with Ultrahigh Sensitivity in Silicon Waveguides and Ring Resonators
IEEE Photonics Journal, 2017Co-Authors: Linjie Zhou, Jianping ChenAbstract:We demonstrate Optical Power monitoring using a silicon resistor enabled by the surface and defect states-induced photoconductance effect. Ultrahigh Optical Power detection sensitivity of −40 dBm under a low AC drive voltage of 5 mV is obtained with the facilitation of a lock-in amplifier circuitry. The detection scheme is applied to monitor the resonances in single and coupled-ring resonators. Intracavity resonance spectrum is successfully measured at both the static and the thermal tuning conditions. The demonstration opens a compelling new way for nonintrusive on-chip Optical Power detection by exploiting doped silicon resistor-based thermooptic heaters.
Aljo Mujcic - One of the best experts on this subject based on the ideXlab platform.
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measurement of Optical Power in the upstream of pon signal from a single onu at the side of the central office by Optical Power meter
International Conference on Ultra Modern Telecommunications, 2010Co-Authors: Edvin Skaljo, Aljo MujcicAbstract:The paper presents a method for the attenuation measurement of the Optical path from ONU to OLT in GPON network. Optical Power meter is connected to the fiber section via splitter in central office receiving Optical signal from all ONU's. Optical Power difference is measured in upstream signal with desired ONU in “on” or “off” state. The difference has a linear relationship with user's bandwidth. Finally paper describes an experimental setup for confirmation of proposal, the results differ by 2,5% from theoretically calculated. The system will improve the service reliability and reduce the maintenance cost.
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ICUMT - Measurement of Optical Power in the upstream of PON signal from a single ONU at the side of the central office by Optical Power meter
International Congress on Ultra Modern Telecommunications and Control Systems, 2010Co-Authors: Edvin Skaljo, Aljo MujcicAbstract:The paper presents a method for the attenuation measurement of the Optical path from ONU to OLT in GPON network. Optical Power meter is connected to the fiber section via splitter in central office receiving Optical signal from all ONU's. Optical Power difference is measured in upstream signal with desired ONU in “on” or “off” state. The difference has a linear relationship with user's bandwidth. Finally paper describes an experimental setup for confirmation of proposal, the results differ by 2,5% from theoretically calculated. The system will improve the service reliability and reduce the maintenance cost.
Zaccaria Silvestri - One of the best experts on this subject based on the ideXlab platform.
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Optical Power meter using radiation pressure measurement
Measurement, 2019Co-Authors: Patrick Pinot, Zaccaria SilvestriAbstract:This paper describes a radiation pressure meter based on a diamagnetic spring. We take advantage of the diamagnetic property of pyrolytic carbon to make an elementary levitated system. It is equivalent to a torsional spring-mass-damper system consisting of a small pyrolytic carbon disc levitated above a permanent magnet array. There are several possible measurement modes. In this paper, only the angular response to an Optical Power single-step is described. An Optical detection composed of a laser diode, a mirror and a position sensitive detector (PSD) allow measurement of the angular deflection proportional to the voltage delivered by the PSD. Once the parameters of the levitated system depending on its geometrical and physical characteristics have been determined regardless of any Optical Power, by applying a simple physical law, one can deduce the value of the Optical Power to be measured from the measurement of the first maximum of the output voltage amplitude.
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New Optical Power sensors using pyrolytic graphite
18th International Congress of Metrology, 2017Co-Authors: Patrick Pinot, Zaccaria SilvestriAbstract:We present two experimental configurations based on a repulsion force acting on a piece of pyrolytic carbon (PyC) in a magnetic induction generated by a magnet array to measure a laser Power in the range from a few milliwatts to a few watts. The levitation configuration consists in measuring the levitation height change of the PyC sheet related with the Optical Power irradiating its surface. The weighing configuration consists in measuring the mass change corresponding to a magnetic repulsion force change acting on a piece of PyC placed on a balance pan and irradiated by a laser beam. The quantities affecting the measurement results have been identified. Examples of measurement results are given. The relative uncertainty of Optical Power measurement is less than 10% for the first experimental set-up and around 1% for the second one. The wavelength dependence on Power response of this device has been quantified. The two PyC-based devices presented in this paper offer a new technique for measuring Optical Power.
