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Journal ArticleDOI

Addressing fiber Bragg grating sensors with wavelength-swept pulse fiber laser and analog electrical switch

15 Mar 2011-Optics Communications (North-Holland)-Vol. 284, Iss: 6, pp 1561-1564
TL;DR: In this paper, a novel FBG sensors interrogation technique with advantages of high signal-to-noise ratio (SNR) and high interrogation speed is experimentally demonstrated, and a FBG sensing system based on this interrogation technique and the mature unbalanced scanning Michelson interferometer (USMI) demodulation technique is realized.
About: This article is published in Optics Communications.The article was published on 2011-03-15. It has received 19 citations till now. The article focuses on the topics: Fiber Bragg grating & Fiber optic sensor.
Citations
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Journal ArticleDOI
TL;DR: This paper studies the security of previous QPC protocols with a semi-honest third party (TP) from the viewpoint of secure multi-party computation and shows that the assumption of a semi -honest TP is unreasonable.
Abstract: As an important branch of quantum cryptography, quantum private comparison (QPC) has recently received a lot of attention. In this paper we study the security of previous QPC protocols with a semi-honest third party (TP) from the viewpoint of secure multi-party computation and show that the assumption of a semi-honest TP is unreasonable. Without the unreasonable assumption of a semi-honest TP, one can easily find that the QPC protocol (Tseng et al. in Quantum Inf Process, 2011, doi: 10.1007/s11128-011-0251-0 ) has an obvious security flaw. Some suggestions about the design of QPC protocols are also given.

123 citations

Journal ArticleDOI
TL;DR: In this paper, a quantum private comparison protocol is proposed based on bell entangled states that can compare the equality of their information with the help of a semi-honest third party.
Abstract: In this paper, a quantum private comparison protocol is proposed based on bell entangled states. In our protocol, two parties can compare the equality of their information with the help of a semi-honest third party. The correctness and security of our protocol are discussed. One party cannot learn the other's private information and the third party also cannot learn any information about the private information.

95 citations

Journal ArticleDOI
TL;DR: A new quantum private comparison protocol based on the four-particle χ-type states, which uses the Pauli local unitary operation on particles to encode the information and to extract information by measurement.
Abstract: We present a new quantum private comparison protocol based on the four-particle χ-type states. Different from previous protocols using the four-particle χ-type states, our protocol have some advantages. Without using the entangled character, we only need to prepare one type of χ-type state and N χ-type states. And we use the Pauli local unitary operation on particles to encode the information and to extract information by measurement. We also discuss that our protocol can withstand all various kinds of outside attacks and participant attacks.

81 citations

Journal ArticleDOI
TL;DR: In this protocol, two types of GHZ states are prepared and use their entanglement properties to encode and compare the private information of X and Y and can withstand all various kinds of outside attacks and participant attacks.
Abstract: We present a new quantum private comparison protocol based on the three-particle GHZ states. In this protocol, we prepare two types of GHZ states and use their entanglement properties to encode and compare the private information of X and Y. We also discuss that our protocol can withstand all various kinds of outside attacks and participant attacks.

77 citations

Journal ArticleDOI
TL;DR: A new multi-party quantum private comparison protocol based on d-dimensional basis states that can withstand various kinds of outside attacks and participant attacks is presented.
Abstract: We present a new multi-party quantum private comparison protocol based on d-dimensional basis states. Different from previous protocols, our protocol have some advantages. n parties can determine wether their private information are equal or not in one time execution of our protocol. Without using the entangled character of d-dimensional basis states, we only need to perform the local unitary operation on particles to encode the information and to get the comparison result. We also discuss that our protocol can withstand various kinds of outside attacks and participant attacks.

54 citations

References
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Journal ArticleDOI
TL;DR: In this paper, the authors review the recent developments in the area of optical fiber grating sensors, including quasi-distributed strain sensing using Bragg gratings, systems based on chirped gratings and intragrating sensing concepts.
Abstract: We review the recent developments in the area of optical fiber grating sensors, including quasi-distributed strain sensing using Bragg gratings, systems based on chirped gratings, intragrating sensing concepts, long period-based grating sensors, fiber grating laser-based systems, and interferometric sensor systems based on grating reflectors.

3,665 citations

Journal ArticleDOI
TL;DR: In this paper, a high-speed, frequency swept, 1300 nm laser source for frequency domain reflectometry and OCT with Fourier domain/swept source detection is presented, which uses a fiber coupled, semiconductor amplifier and a tunable fiber Fabry-Perot filter.
Abstract: We demonstrate a high-speed, frequency swept, 1300 nm laser source for frequency domain reflectometry and OCT with Fourier domain/swept-source detection. The laser uses a fiber coupled, semiconductor amplifier and a tunable fiber Fabry-Perot filter. We present scaling principles which predict the maximum frequency sweep speed and trade offs in output power, noise and instantaneous linewidth performance. The use of an amplification stage for increasing output power and for spectral shaping is discussed in detail. The laser generates ~45 mW instantaneous peak power at 20 kHz sweep rates with a tuning range of ~120 nm full width. In frequency domain reflectometry and OCT applications the frequency swept laser achieves 108 dB sensitivity and ~10 mum axial resolution in tissue. We also present a fast algorithm for real time calibration of the fringe signal to equally spaced sampling in frequency for high speed OCT image preview.

634 citations

Journal ArticleDOI
TL;DR: A novel application of a wavelength-swept fiber laser to fiber Bragg grating sensor-array interrogation and static-dynamic strain measurements with a resolution of 0.47mu?
Abstract: We demonstrate a novel application of a wavelength-swept fiber laser to fiber Bragg grating sensor-array interrogation. The laser provides high signal powers of >3 mW with <0.1-nm spectral resolution over a 28-nm wavelength span. Using time-interval counting, we demonstrate static-dynamic strain measurements with a resolution of 0.47mu? rms at a sampling rate of 250 Hz.

335 citations

Journal ArticleDOI
TL;DR: In this article, a feedback control technique was introduced to a tunable Fabry-Perot filter that tracks the wavelength-shift of the sensor, and the sensors were demodulated using an unbalanced scanning Michelson interferometer and a sensitivity of 1.682/spl deg///spl µ/spl mu/spl epsi/
Abstract: A wavelength-division-multiplexing technique for interrogating 10-cascaded fiber Bragg grating sensing elements based on a ring-compounded-cavity fiber laser is reported. A feedback control technique was introduced to a tunable Fabry-Perot filter that tracks the wavelength-shift of the sensor. The sensors were demodulated using an unbalanced scanning Michelson interferometer and a sensitivity of 1.682/spl deg///spl mu//spl epsi/ has been demonstrated.

88 citations

Journal ArticleDOI
TL;DR: In this article, a higher order polarization mode dispersion (PMD) compensator using a fixed differential group delay (DGD) section followed by a variable section was proposed and compared using dynamic PMD tracking.
Abstract: We propose and analyze a higher order polarization mode dispersion (PMD) compensator using a fixed differential group delay (DGD) section followed by a variable section. The performance limits of various PMD compensators are quantified and compared using dynamic PMD tracking. Compared with existing compensators with a single fixed DGD, the proposed compensator improves an nonreturn-to-zero 10-Gb/s link tolerance to average PMD from 28 to 44 ps. Alternatively, the tolerance increases to only 36 ps using a compensator with two fixed-DGD sections.

78 citations