Performance comparison of Raman/erbium-doped-fiber hybrid-amplification-based long-distance fiber Bragg grating sensor systems

Huh, Jeong Hyun; Chang, Young Eun; Liu, Yan; Lee, Ju Han

doi:10.1364/ao.51.000348

Cited by 2 publications

(2 citation statements)

References 11 publications

(15 reference statements)

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“…Presently, design of power divider especially for UWB is challenging in terms of operating bandwidth, phase equality and overall size. Several methods have been proposed in recent time, such as multi-section, multilayer with vias and DGS based [2][3][4]. An UWB power divider was proposed by three parallel coupled lines, a short-circuited shunt stub and a resistor [5].…”

Section: The Us-federal Communication Commission (Us-fcc)mentioning

confidence: 99%

“…A fiber Bragg grating (FBG) sensor is applied to various fields for the past few years, mainly due to its simple structure, low cost, small size, low‐insertion loss, robust anti‐jamming, and good corrosion resistance. Many types of FBG sensor are based on the principle that the center wavelength of FBG shifts with some perturbations (e.g., temperature and microstress) . One of the most outstanding properties of FBG sensor is that its measuring signal is wavelength.…”

Section: Introductionmentioning

confidence: 99%

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A wide‐range demodulation method for FBG sensor

Chen

Shi

Lei

et al. 2016

Micro & Optical Tech Letters

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The principle, structure design, and experimental setup of a fiber Bragg grating (FBG) sensor based on matching grating are introduced. The FBG sensor requires several fiber gratings to demodulate. This study proposes a simple signal detection method to demodulate the resonance wavelength shift of the FBG. Photodiodes convert the reflected light signal of every fiber grating into electrical signal. The reflected light signals are then collected by a computer through a data collection box. The physical quantity is reported in real time according to the calibrated data. This method has a wider range of demodulation and displays the drift of center wavelength of sensor FBG in real time. The temperature/strain cross-sensitivity issue of FBG sensor is solved to some extent due to the same temperature drift of the same type of FBG. Experimental results show that the system has a wavelength measurement error of less than 0.009 nm, and the corresponding microstrain measurement error is less than 7.5 le.ABSTRACT: A 3dB broadband power divider has been designed using multi-mode resonator (MMR) technique. It resonates in four different modes of frequencies. Out of these, three of them are responsible for broadening the operating band, which may be controlled precisely by the impedance ratio of the resonator. It shows an equal magnitude, inphase power division at outputs from 3.1 to 10.7 GHz, which complies the FCC defined UWB. It has advantages like single layer design, via less, compact and operating band is tunable by the dimensions of the MMR.

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