scholarly journals High stability microwave frequency distribution with optical fiber

2011 ◽  
Author(s):  
Yi Dong ◽  
Lumin Zhang ◽  
Le Chang ◽  
Zhaohui Li ◽  
Lilin Yi ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Frequency Distribution ◽  
High Stability ◽  
Microwave Frequency

scholarly journals Delivery of high-stability optical and microwave frequency standards over an optical fiber network

2003 ◽  
Vol 20 (7) ◽  
pp. 1459 ◽  
Author(s):  
Jun Ye ◽  
Jin-Long Peng ◽  
R. Jason Jones ◽  
Kevin W. Holman ◽  
John L. Hall ◽  
...  
Keyword(s):  
Optical Fiber ◽  
High Stability ◽  
Microwave Frequency ◽  
Fiber Network ◽  
Frequency Standards ◽  
Optical Fiber Network

MEASUREMENT OF THE ENERGIES OF α-PARTICLES

1948 ◽  
Vol 26a (4) ◽  
pp. 243-254 ◽  
Author(s):  
T. E. Cranshaw ◽  
J. A. Harvey
Keyword(s):  
Frequency Distribution ◽  
Ionization Energy ◽  
Ionization Chamber ◽  
Experimental Error ◽  
High Stability ◽  
Energy Curve ◽  
Electron Collection ◽  
Linear Amplifier ◽  
Electronic Pulse ◽  
Α Particles

The energies of the α-particles from weak preparations of several new radioactive substances were measured in a grid ionization chamber filled with argon. The accurately known energies of α-particles from several well known sources were used for calibration. The voltage pulses produced by electron collection from the tracks were amplified in a linear amplifier of high stability and converted into flat-topped pulses. An accurately known voltage was subtracted, and the small residual pulses were further amplified. The frequency distribution of pulse sizes was recorded on an electronic pulse analyzer.The final values of the energies are as follows:92U233, 4.823 ± 0.003; 89Ac225, 5.801 ± 0.010; 87Fr221, 6.298 ± 0.010;85At217, 7.023 ± 0.010; 84Po213, 8.336 ± 0.005; and 94Pu239, 5.159 ± 0.005 Mev.The ionization–energy curve in argon was found to be linear within experimental error for α-particles of energy 5 to 9 Mev. Extrapolation of this line determines an intercept of 85 kev. at zero ionization.

Numerical Analysis of Thermal Dependence of the Spectral Response of Polymer Optical Fiber Bragg Gratings

2016 ◽  
Vol 12 (1) ◽  
pp. 85-95 ◽  
Author(s):  
Hisham Hisham
Keyword(s):  
Optical Fiber ◽  
High Stability ◽  
Spectral Response ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Bragg Reflector ◽  
Polymer Optical Fiber ◽  
Thermal Dependence ◽  
Silica Optical Fiber ◽  
Index Modulation

The thermal dependence of the spectral response (i.e. transmission, reflection and time delay ( r) responses) of uniform polymer optical fiber (POF) Bragg gratings has been investigated. In addition to the temperature dependence, the effects of grating strength (kLg) and fiber index modulation ( n) have been investigated. Besides high capability of tunable wavelength due to the unique large and negative thermo-optic coefficient of POF, the spectral response for POF Bragg gratings show high stability and larger spectrum bandwidth with temperature variation compare with the silica optical fiber (SOF) Bragg gratings, especially with the increase of the kLg value. It was found that by increasing kLg, the peak reflectance value increases and the bandwidth of the Bragg reflector become narrower. Also it’s shown by increasing the kLg value, r deceasing significantly and reach its minimum value at the designed wavelength ( B). Furthermore, the r for POF Bragg gratings is less than that for SOF Bragg gratings at the same value of kLg. Also it’s found that the peak reflectivity value increases to around 60% when the n value increases from 1*10-4 to 5*10-4.

High-stability optical fiber sensor system

1991 ◽  
Author(s):  
Yu-Feng Chen ◽  
Yue-kun Liang ◽  
Hong Bian
Keyword(s):  
Optical Fiber ◽  
High Stability ◽  
Optical Fiber Sensor ◽  
Sensor System ◽  
Fiber Sensor

A high-stability quasi-spherical resonator in SPRIGT for microwave frequency measurements at low temperatures

2019 ◽  
Vol 64 (5) ◽  
pp. 286-288 ◽  
Author(s):  
Haiyang Zhang ◽  
Wenjing Liu ◽  
Bo Gao ◽  
Yanyan Chen ◽  
Changzhao Pan ◽  
...  
Keyword(s):  
Low Temperatures ◽  
High Stability ◽  
Microwave Frequency ◽  
Frequency Measurements ◽  
Spherical Resonator

High-resolution Microwave Frequency Dissemination via 56 km Optical Fiber Based on Microwave Phase Compensation

2021 ◽  
Vol 50 (4) ◽  
pp. 32-38
Author(s):  
全洪雷 Honglei QUAN ◽  
赵文宇 Wenyu ZHAO ◽  
薛文祥 Wenxiang XUE ◽  
邢燕 Yan XING ◽  
姜海峰 Haifeng JIANG ◽  
...  
Keyword(s):  
High Resolution ◽  
Optical Fiber ◽  
Microwave Frequency ◽  
Phase Compensation

New Microwave Frequency Dissemination Method over Optical Fiber Based on the Phase Fluctuation Compensated at Remote Sites

2014 ◽  
Vol 34 (7) ◽  
pp. 0706001
Author(s):  
李得龙 Li Delong ◽  
卢麟 Lu Lin ◽  
张宝富 Zhang Baofu ◽  
李晓亚 Li Xiaoya ◽  
滕义超 Teng Yichao
Keyword(s):  
Optical Fiber ◽  
Phase Fluctuation ◽  
Microwave Frequency ◽  
Remote Sites

Microwave Frequency Dissemination via 50 km Optical Fiber Based on Optical Delay Compensation

2020 ◽  
Vol 49 (8) ◽  
pp. 806002-806002
Author(s):  
赵粹臣 Cui-chen ZHAO ◽  
赵文宇 Wen-yu ZHAO ◽  
薛文祥 Wen-xiang XUE ◽  
全洪雷 Hong-lei QUAN ◽  
闫露露 Lu-lu YAN ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Microwave Frequency ◽  
Delay Compensation ◽  
Optical Delay
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