A Large Serial Time-Division Multiplexed Fiber Bragg Grating Sensor Network

Wang, Yunmiao; Gong, Jianghong; Dong, Bo; Wang, Dorothy Y.; Shillig, Tyler; Wang, Anbo

doi:10.1109/jlt.2012.2205897

Cited by 151 publications

(66 citation statements)

References 12 publications

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“…Identical FBGs can be efficiently fabricated at high spatial density [1], and their low reflectivity allows for crosstalk-free operation even in large arrays of FBGs [2]. In turn, specific interrogation methods are required to demodulate this type of arrays.…”

mentioning

confidence: 99%

“…In turn, specific interrogation methods are required to demodulate this type of arrays. Spectral analysis cannot detect the wavelength shifts experienced by each of the FBGs in the array and, in order to provide both range and spectral selectivity, either time-multiplexed techniques [1], [3] or optical Fourier-domain reflectometry (OFDR) systems [2], [4] have been developed for this purpose.…”

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confidence: 99%

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Interrogation of a Sensor Array of Identical Weak FBGs Using Dispersive Incoherent OFDR

Clement

Torregrosa

Hervás

et al. 2016

IEEE Photon. Technol. Lett.

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confidence: 99%

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confidence: 99%

Interrogation of a Sensor Array of Identical Weak FBGs Using Dispersive Incoherent OFDR

Clement

Torregrosa

Hervás

et al. 2016

IEEE Photon. Technol. Lett.

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“…The multiple-reflection noise has been thoroughly studied in previous weak-reflection sensing studies. 23 Accordingly, a computer simulation based on the previous model was conducted to theoretically investigate the noise that solely contributed by the multiple reflections. This simulation suggests that the SNR remains above 55 dB, as the number of multiplexed sensors increases to 100 K. Thus, the multiple-reflection cross talk can be ignored since it is far below the background noise of the system.…”

Section: Resultsmentioning

confidence: 99%

Multiplexed displacement fiber sensor using thin core fiber exciter

Chen

Hefferman

Wei

2015

Review of Scientific Instruments

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. (2015). Multiplexed displacement fiber sensor using thin core fiber exciter. This letter reports a multiplexed optical displacement sensor using a thin core fiber (TCF) exciter. The TCF exciter is followed by a stripped single mode optical fiber. A small section of buffer is used as the movable component along the single mode fiber. Ultra-weak cladding mode reflection (<−75 dB) was employed to probe the refractive index discontinuity between the air and buffer coating boundary. The position change of the movable buffer segment results in a delay change of the cladding mode reflection. Thus, it is a measure of the displacement of the buffer segment with respect to the glass fiber. The insertion loss of one sensor was measured to be less than 3 dB. A linear relationship was evaluated between the measurement position and absolute position of the moving actuator. Multiplexed capability was demonstrated and no cross talk was found between the sensors. C 2015 AIP Publishing LLC.[http://dx

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“…Spectral shadowing describes the spectral distortion of the downstream FBGs induced by the insertion loss of the upstream FBGs. For the weak FBG array, the returned power from the ith(i =1,2,…,n) FBG at the wavelength λ can be approximated as [8] 2 ( 1) …”

Section: Crosstalk Of Gratingsmentioning

confidence: 99%

“…However, for this normal FBG array, the multiplexing capacity is seriously limited by intrinsic crosstalk [6]. A newly developed optical time-domain reflectometry-FBG network with a weak FBG array has been reported [7,8]. Its interrogated system selects the tunable laser (T-LD) as the source and distinguishes FBGs by a high-speed data acquisition.…”

Section: Introductionmentioning

confidence: 99%

An interrogation system based on two semiconductor optical amplifiers for weak fiber Bragg gratings

2014

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An interrogation system based on two semiconductor optical amplifiers for weak fiber Bragg gratings (FBGs) was proposed. The first semiconductor optical amplifier (SOA) was used to modulate the light, and the second SOA separated the reflected signal from the different FBGs through delayed switching. The proposed system has lower insertion loss and higher spatial resolution, and can interrogate the time-and wavelength-division multiplexed FBG array. Up to 50 FBGs, with a reflectivity of 0.2% and a spatial resolution of 5 m along the optical fiber, were distinguished to demonstrate the interrogation system.

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A Large Serial Time-Division Multiplexed Fiber Bragg Grating Sensor Network

Cited by 151 publications

References 12 publications

Interrogation of a Sensor Array of Identical Weak FBGs Using Dispersive Incoherent OFDR

Interrogation of a Sensor Array of Identical Weak FBGs Using Dispersive Incoherent OFDR

Multiplexed displacement fiber sensor using thin core fiber exciter

An interrogation system based on two semiconductor optical amplifiers for weak fiber Bragg gratings

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