Xuan Quyen Dinh

Shanghai University

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Perry Ping Shum

Southern University of Science and Technology

Zhifang Wu

Huaqiao University

Georges Humbert

Centre National de la Recherche Scientifique

Jean‐Louis Auguste

Université de Limoges

Ken‐Tye Yong

University of Sydney

Xuguang Shao

Nanyang Technological University

Shuwen Zeng

Centre National de la Recherche Scientifique

Hailiang Zhang

China Meteorological Administration

Renaud Bachelot

Université de Technologie de Troyes

Safi Jradi

Université de Technologie de Troyes

Cooperative Institutions

Centre National de la Recherche Scientifique

Nanyang Technological University

Université de Technologie de Troyes

Centre de Nanosciences et de Nanotechnologies

Chinese Academy of Sciences

Light, nanomaterials, nanotechnologies

Université Paris-Saclay

Huazhong University of Science and Technology

Thales (France)

Vietnam Academy of Science and Technology

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Optical twisting alert sensor based on PM-EDF short cavity DBR laser

Xuan Quyen Dinh Meng Jiang Perry Ping Shum Zhifang Wu

We report an optical twisting alert sensor using beat frequency from a short cavity polarization-maintaining erbium-doped fiber (PM-EDF) based distributed Bragg reflector (DBR) laser. A DBR fiber laser with an effective cavity length of ∼ 1 cm formed by a pair of fiber Bragg gratings (FBGs) inscribed on a portion of PM-EDF was developed for demonstrated. This fiber laser exhibited stable operation in dual-polarization single-longitudinal-mode. The amplitude of the beat frequency generated by two orthogonal polarizations of the cavity is twist dependence. It is shown that the beat frequency signal can be completely "turned off" at ∼ 180° twist angle. This type of single mode DBR fiber laser can be used as optical twisting alert sensors for remotely interrogated systems and multi-parameter monitoring systems.

10.1109/pgc.2012.6458104

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Directional torsion and temperature discrimination based on a multicore fiber with a helical structure

Optics Express (2018)

Hailiang Zhang Zhifang Wu Perry Ping Shum Xuguang Shao Ruoxu Wang

We propose and experimentally demonstrate a directional torsion sensor based on a Mach-Zehnder interferometer formed in a multicore fiber (MCF) with a ~570-μm-long helical structure (HS). The HS was fabricated into the MCF by simply pre-twisting and then heating with a CO2 laser splicing system. This device shows the capability of directional torsion measurement from -17.094 rad/m to 15.669 rad/m with the sensitivity of ~0.118 nm/(rad/m). Moreover, since the multiple interferences respond differently to torsion and temperature simultaneously, the temperature cross-sensitivity of the proposed sensor can be eliminated effectively. Besides, the sensor owns other merits such as easy fabrication and good mechanical robustness.

Fusion splicing

Robustness

10.1364/oe.26.000544

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Citations (92)

Directional bending sensor based on spatially arrayed long period gratings in multicore fiber

Hailiang Zhan Ming Tang Zhifang Wu Perry Ping Shum Xuguang Shao

Spatially arrayed long period gratings (LPGs) are inscribed in a multicore fiber by CO ₂ laser. The LPGs in the center core and one outer core exhibit different responses to bending and temperature. The directional bending sensor based on the LPGs has large sensitivity even for ultra-low curvature values ranging from 0 to 0.359 m ^-1 .

Inscribed figure

Multi-core processor

10.1109/cleopr.2017.8118889

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Measurement of photon distribution in attenuated diode laser pulses

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (2003)

Liantuan Xiao Romain Alléaume Xuan Quyen Dinh François Treussart Bernard Journet

Faint laser pulses are practical signal sources in quantum key distribution. The photon statistics has been measured by recording every photo-counts moment and leading directly to the Mandel parameter of the photon distribution. Two different types operation of a single mode laser diode have been considered: either direct pulsing of the driving current or CW emission followed by pulse-shaping using an acousto-optic modulator. In both cases, it has been found that for practical attenuations, the photon distribution in each light pulse follows a poissonian statistics.

Quantum key distribution

SIGNAL (programming language)

Photon Counting

Laser diode

10.1117/12.474380

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Design and Fabrication of Side channel Photonic Crystal Fiber

HAL (Le Centre pour la Communication Scientifique Directe) (2012)

Ying Cui Georges Humbert Xuan Quyen Dinh Luan Feng Hai Vu Ngoc

Microstructured optical fiber

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Investigation of Axial Strain Effects on Microwave Signals from a PM-EDF Short Cavity DBR Laser for Sensing Applications

IEEE photonics journal (2012)

Meng Jiang Xuan Quyen Dinh Perry Ping Shum S. Molin Zhifang Wu

The effects of axial strain on beating frequency from a short cavity polarization-maintaining erbium-doped fiber (PM-EDF) based distributed Bragg reflector (DBR) laser were investigated theoretically and experimentally for the first time. This type of single-mode DBR fiber laser based ultrasensitive sensor has been extensively developed for measuring kinds of measurands, but the cross-sensitivity of axial strain was usually ignored. A DBR fiber laser with an effective cavity length of $\sim$ 1 cm formed by a pair of FBGs written on a PM-EDF was fabricated for demonstration. This laser operated in dual-polarization single-longitudinal mode stably. The frequency of the beating signal generated by two orthogonal polarizations was found to be proportional to the axial strain applied on the cavity. A linear strain sensitivity of 0.640 $\hbox{GHz/m}\varepsilon$ was obtained, with a fiber birefringence of around 8.65e-5. For the fiber with larger birefringence, the sensitivity to the axial strain will be increased. So the effects of axial strain should be considered when the structure is utilized as a high-resolution sensor, especially for a polarization-maintaining system. The single-mode DBR laser made of high birefringent fibers also has a potential application in frequency tunable microwave generation.

Fiber Bragg Grating

10.1109/jphot.2012.2211002

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Citations (10)

Investigation on the Impact of Hi-Bi Fiber Length on the Sensitivity of Sagnac Interferometer

IEEE Sensors Journal (2014)

Ying Cui Zhifang Wu Perry Ping Shum Xuan Quyen Dinh Georges Humbert

Optical fiber Sagnac interferometers (OFSIs) constructed by a 3-dB coupler and a high-birefringence (Hi-Bi) fiber has been developed into various sensors in recent decades. However, the discussion on the length of Hi-Bi fiber in this setup remains limited. In this paper, the sensing length of the Hi-Bi fiber is separated from the total length of the Hi-Bi fiber for the first time in analysis and the impact of Hi-Bi fiber length on the sensitivity of the Sagnac interferometer is investigated. It is found that the sensitivity of OFSI is linearly proportional to the ratio of the sensing length over the total length of the Hi-Bi fiber. This dependence is confirmed by the experimental results of an OFSI-based strain sensor. The highest sensitivity achieved is about 20 times of the lowest sensitivity achieved using the same setup but different sensing length to total length ratios. This paper provides a general guideline for the sensitivity enhancement and optimization of OFSI-based sensors.

10.1109/jsen.2014.2304521

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Citations (2)

Optofluidic Sensing With A Side‐channel Photonic Crystal Fiber Based Sagnac Interferometer

HAL (Le Centre pour la Communication Scientifique Directe) (2017)

Nan Zhang Kaiwei Li Georges Humbert Perry Ping Shum Zhifang Wu

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Discrimination between refractive index and temperature by two cascaded cladding-mode type fiber sensors

26th Optoelectronics and Communications Conference (2012)

Meng Jiang Perry Ping Shum Zhi Fang Wu Xuan Quyen Dinh Dora Juan Juan Hu

We demonstrated a fiber sensor for simultaneous measurement of refractive index and temperature by cascading one long period grating and one modal interferometer. Cladding mode interference between them was also investigated here.

Cladding mode

Cladding (metalworking)

Fiber Bragg Grating

Normalized frequency (unit)

Long-period fiber grating

Step-index profile

All-silica fiber

10.1109/oecc.2012.6276629

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A theoretical insight into the use of anti-reflective coatings for the upliftment of sensitivity of surface plasmon resonance sensors

Optics Communications (2019)