Electrically induced dynamic Fano-like resonance in a graphene-coated fiber grating

Jiang, Biqiang; Zhang, Xiaoming; Li, Ailun; Hou, Yueguo; Hao, Zhen; Gan, Xuetao; Zhao, Jianlin

doi:10.1364/prj.453762

Cited by 9 publications

(9 citation statements)

References 40 publications

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“…In particular, the rare earth ions as micro-heaters are in the core and the fiber cladding plays a protective role. Therefore, compared with the graphene-coated heaters [19], it can be well insulated from external pollution such as humidity and dust, maintaining a long-term stability of the device.…”

Section: Experiments and Analysismentioning

confidence: 99%

“…Compared with other modulation methods such as displacement, temperature and strain, the proposed all-optical modulation has the advantages of simple structure and remote control [10,17,18]. Besides, compared with the electrical modulation method that requires FBG coated with graphene and gold electrodes, the proposed scheme is simple to fabricate, as long as commercial fibers and grating are simply spliced [19]. In particular, the high sensitivity all-optical modulation utilizing doped rare earths in EYDF is achieved in this paper, and the modulation response time obtained is 192 ms, which is also higher than that of previous modulation schemes.…”

Section: Experiments and Analysismentioning

confidence: 99%

“…Typically, this asymmetric lineshapes are formed by interference between two modes with different Q factors, or rather, as a result of interference between a discrete mode and a continuum mode [15,16]. Recently, all-fiber Fano-like lineshape regulation schemes based on FBG have been widely reported [17][18][19]. In these schemes, Fano-like lineshapes are obtained by coupling a high-Q FBG with a low-Q fiber Mach-Zehnder interferometer (MZI).…”

Section: Introductionmentioning

confidence: 99%

“…However, in the manipulation of the device using temperature and strain, the additional phase shifts are easily introduced to the sensitive MZI, and the corresponding tuning speeds are also relatively slow [17,18]. Despite the electrically induced dynamic Fano-like resonances is remotely controllable and has a fast response, it requires careful coating of graphene and Au electrodes on the FBG's surface, and maintaining the long-term stability of the material coating on the fiber will also be a challenge in practical applications [19].…”

Section: Introductionmentioning

confidence: 99%

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All-optical modulation of Fano-like resonances in apodized fiber Bragg grating using Er/Yb doped fiber

Wang,

Lin,

et al. 2024

J. Phys. D: Appl. Phys.

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A novel all-optical scheme for fast modulation of Fano-like resonance using Er/Yb doped fiber (EYDF) is proposed and demonstrated experimentally. In the integrated system, an apodized fiber Bragg grating (AFBG) is inserted into one arm of the fiber Mach-Zehnder interferometer (MZI), and the asymmetric Fano-like resonances is generated by the interference between the MZI mode and AFBG mode. In addition, a section of EYDF is inserted into the other arm of the MZI to control the phase difference between the two arms of the MZI. By adjusting the power of optical pump applied to the EYDF, the transmission spectrum lineshapes of the integrated device can be effectively modulated into asymmetric Fano-like resonances, symmetric transmission dip or electromagnetically induced transparency (EIT)-like resonances, which has a fast response speed. The proposed all-optical Fano-like modulation scheme is simple in structure, and has advantages of remote control and long-term stability, providing potential applications in the fields of fast and slow light, optical filters and fiber sensing.

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Section: Experiments and Analysismentioning

confidence: 99%

Section: Experiments and Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

All-optical modulation of Fano-like resonances in apodized fiber Bragg grating using Er/Yb doped fiber

Wang,

Lin,

et al. 2024

J. Phys. D: Appl. Phys.

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“…Laser measurement systems have the merits of high sensitivity, rapid response, high accuracy, and so forth 1–22 . Metal materials undergo thermal expansion under varying temperature changes 23–25 .…”

Section: Introductionmentioning

confidence: 99%

A systematic study on linear thermal expansion coefficient of metals based on interferometric measurement with Fresnel bimirror

Lu,

Zhao,

Lin

et al. 2024

Micro & Optical Tech Letters

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Linear thermal expansion coefficient, which is vital for measuring the thermal expansion characteristics of metals, has been attracting considerable attention globally. Herein, a novel design based on Fresnel bimirror has been developed. In this design, when the upper end of the object to be measured comes in contact with a tilted double‐sided mirror, the temperature rises and intersection angle of the Fresnel bimirror decreases. Meanwhile, interference fringe spacing becomes narrower, while the number of fringes increases. An imaging system based on a digital microscope and smartphone is also incorporated in this design, which records the changes in the interference fringes. Then, using a self‐programmed software, the linear thermal expansion coefficients of Cu, Fe, and Al samples are determined at elevated temperatures as 17.85 ± 0.23 × 10−6/°C (), 11.8 ± 0.09 × 10−6/°C (), and 23.34 ±0.16 × 10−6/°C (), respectively, with a relative error of less than 1.6%. A cooling process is also designed, and the average value of the linear thermal expansion coefficient of metal samples during heating and cooling conditions is determined. The measurement results obtained via the finite‐method simulation demonstrate the feasibility and reliability of the system. Overall, this study provides a new idea for measuring the linear thermal expansion coefficient of metals.

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Influence of water vapor concentration on photoacoustic spectroscopy‐based characteristic gas analysis of transformer faults

Mo,

Zhou,

Han

et al. 2024

Micro & Optical Tech Letters

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The water vapor in the ambient air affects the accuracy of the photoacoustic (PA) dissolved gas analysis system for transformer health monitoring. A laser PA system was evaluated by dry and humidified standard gases to study the influence of water vapor concentration on PA gas detection. Theoretical analysis was conducted on the effect of gas molecule relaxation on PA signal detection. A high‐frequency resonant PA cell and a low‐frequency nonresonant PA cell were used to detect acetylene (C2H2) and carbon monoxide (CO), respectively. The experimental results show that the PA signal of humidified CO is about 12 times higher than PA signal of dry gas for the resonant PA detection system, respectively. In addition, as the frequency is increased from 30 to 980 Hz, the PA signals of humidified and dry CO attenuate by 1.5 and 6.9 times, respectively.

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Electrically induced dynamic Fano-like resonance in a graphene-coated fiber grating

Cited by 9 publications

References 40 publications

All-optical modulation of Fano-like resonances in apodized fiber Bragg grating using Er/Yb doped fiber

All-optical modulation of Fano-like resonances in apodized fiber Bragg grating using Er/Yb doped fiber

A systematic study on linear thermal expansion coefficient of metals based on interferometric measurement with Fresnel bimirror

Influence of water vapor concentration on photoacoustic spectroscopy‐based characteristic gas analysis of transformer faults

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