A comparison of temperature sensing characteristics of SMS structures using step and graded index multimode fibers

Kumar, Manoj; Kumar, Arun; Tripathi, Saurabh Mani

doi:10.1016/j.optcom.2013.09.034

Cited by 38 publications

(18 citation statements)

References 11 publications

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“…When the output of a broadband light source is injected into one of the SMFs, the transmitted light exhibits multiple characteristic dips (or peaks) in its spectrum, induced by multimodal interference. Refer to previous literatures [19,23,24] for its detailed operating mechanism. The intervals of the neighboring dips are inconstant both in wavelength and frequency.…”

Section: Principlementioning

confidence: 99%

“…Sensing technology of strain and temperature using optical fibers has been an active area of research for many decades, and a wide variety of configurations have been developed thus far. They operate based on fiber Bragg gratings [1,2,3], long-period gratings [4,5], Brillouin scattering [6,7,8,9], Raman scattering [10,11], optical interference [12,13,14,15,16,17,18,19,20,21,22,23,24], and many others. Among numerous types of interference-based sensors, those based on intermodal interference in multimode fibers (MMFs) have recently attracted a considerable attention owing to their system simplicity and cost efficiency.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Observation of multimodal interference in millimeter-long polymer optical fibers

Mizuno

Hagiwara

Matsutani

et al. 2019

IEICE Electron. Express

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We observe multimodal interference in single-mode-multimodesingle-mode sensors comprising short polymer optical fibers (POFs) with lengths from 100 mm down to 7 mm. Characteristic spectral peaks/dips are observed not in the conventionally used telecom band but around 1000 nm. We find that the dip wavelength depends on temperature but that the sensitivity is much lower than those obtained in the longer wavelength range when longer POFs are used. We discuss the possibility that, even with the reduced sensitivity, our success in observing multimodal interference in millimeter-long optical fibers will be a basis toward the combined use of frequency and intensity information in conventional fiber-optic single-point sensors for discriminative measurement of multiple physical parameters.

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Section: Principlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Observation of multimodal interference in millimeter-long polymer optical fibers

Mizuno

Hagiwara

Matsutani

et al. 2019

IEICE Electron. Express

View full text Add to dashboard Cite

show abstract

“…The light power coupled into the SMF-output fiber depends on the relative phase difference at the end of the multimode fiber (L). According to [1,2], the power coupled into the second SMF can be written as: …”

Section: Theorymentioning

confidence: 99%

“…In recent years, allfiber MZI is proposed to take place of the standard MZI for improving the performance. It is not only used for measurement of temperature, pressure, flatness of plane optical plates, thickness of thin film, coherence length of a laser [1][2], but also used in optical communication systems, such as DPSK demodulator [3][4][5][6]. However, in the DPSK demodulation scheme proposed in [3], there is one problem of stability due to the two beams go through two different paths.…”

Section: Introductionmentioning

confidence: 99%

DPSK signals demodulation based on a multimode fiber with a central dip

Chen¹,

Horche²,

Minguez

2014

2014 19th European Conference on Networks and Optical Communications - (NOC)

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Abstract-Differential Phase Shift Keying (DPSK) modulation format has been shown as a robust solution for next-generation optical transmission systems. One key device enabling such systems is a delay interferometer, converting the phase modulation signal into the intensity modulation signal to be detected by the photodiodes. Usually, a standard Mach-Zehnder interferometer (MZI) is used for demodulating a DPSK signal. In this paper, we develop an MZI which is based on all-fiber Multimode Interference (MI) structure: a multimode fiber (MMF) with a central dip, located between two single-mode fibers (SMFs) without any transition zones.The MI based MZI (MI-MZI) is more stable than the standard MZI as the two arms share the same MMF, reducing the impact of the external effects, such as temperature and others. Performance of this MI-MZI is analyzed theoretically and experimentally from transmission spectrum. Experimental results shows that high interference extinction ratio is obtained, which is far higher than that obtained from a normal graded-index based MI-MZI. Finally, by software simulation, we demonstrate that our proposed MI-MZI can be used for demodulating a 40 Gbps DPSK signal. The performance of the MI-MZI based DPSK receiver is analyzed from the sensitivity. Simulation results show that sensitivity of the proposed receiver is about -22.3 dBm for a BER of 10 15 and about -23.8 dBm for a BER of 10 9 .

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“…In this paper, a HOMF-based fiber modal interferometer supporting three dominant modes is achieved with distinct chromatic dispersion of each guided mode and intermodal dispersion. Compared to conventional multimode interference structures (SMF-multimode-SMF structures, taper or lateral-offset in fiber Mach-Zehnder interferometers [23][24][25][26][27][28][29][30][31][32][33][34][35]) with a great amount of high-order optical modes, the proposed HOMF modal interferometer supports only a few steady core-guided modes which only need to be calibrated once for sensing response which is essential for practical applications. Thus the HOMF-based sensor here could be deployed for highly accurate discrimination based on the precise dispersion measurement and analysis on intermodal coupling with a novel phase demodulation scheme.…”

Section: Introductionmentioning

confidence: 99%

Dispersion effects of high-order-mode fiber on temperature and axial strain discrimination

Song

et al. 2015

Photonic Sens

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Abstract:A new approach utilizing effects of dispersion in the high-order-mode fibers (HOMFs) to effectively discriminate changes in environmental temperature and axial strain is proposed and experimentally demonstrated. Experimental characterization of a HOMF-based fiber modal interferometer with a sandwich fiber structure exhibits excellent agreements with numerical simulation results. A Fourier transform method of interferometry in the spatial frequency domain is adopted to distinguish mode coupling between different core-guided modes. Distinct phase sensitivities of multiple dispersion peaks are extracted by employing a novel phase demodulation scheme to realize dual-parameter sensing.

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A comparison of temperature sensing characteristics of SMS structures using step and graded index multimode fibers

Cited by 38 publications

References 11 publications

Observation of multimodal interference in millimeter-long polymer optical fibers

Observation of multimodal interference in millimeter-long polymer optical fibers

DPSK signals demodulation based on a multimode fiber with a central dip

Dispersion effects of high-order-mode fiber on temperature and axial strain discrimination

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