Imperfect quarter-waveplate compensation in Sagnac interferometer-type current sensors

Short, S.X.; Tselikov, A. A.; Arruda, Josiel Urbaninho de; Blake, J.

doi:10.1109/50.701399

Cited by 75 publications

(23 citation statements)

References 8 publications

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“…3 that the smoothed ellipticity or extinction ratio (E c ) can be maintained larger than 43.5°or 12.89 dB, respectively, at wavelength range from 1549-1603 nm. Depending on different applications requirements [8], for example, if a bigger tolerance such as h > 43°(corresponding to E c > 11.56 dB) is acceptable, the wavelength range or bandwidth of the quarter-waveplate can be extended to 70 nm in Fig. 3.…”

Section: Experimental Measurement Of Quarterwaveplate Made Of Birefrimentioning

confidence: 98%

Temperature stabilized and broadband fiber waveplate fabricated with a birefringent photonic crystal fiber

Dong

Hao

et al. 2010

Front. Optoelectron. China

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An all-fiber waveplate made by a piece of birefringent photonic crystal fiber (PCF) is proposed and studied in this paper. The characteristics of the proposed waveplate, including the wavelength dependent phase difference between the orthogonal polarized propagation mode in the waveplate, and temperature stability of the waveplate, were investigated theoretically and experimentally for the first time to our knowledge. Compared with the fiber waveplate made by the stress induced or the conventional geometrical shape formed (such as the elliptical core fiber) birefringent fiber, the waveplate based on the birefringent PCF has distinguishable advantages including high temperature stability and large bandwidth. A prototype quarter-waveplate is fabricated by cutting and splicing a segment of birefringent PCF with conventional single mode fiber. The measurement showed that the fluctuation of the ellipticity of the output light from the waveplate can be kept within AE0.23°for temperatures varying from 25°C to 200°C, and the bandwidth for ellipticity larger than 43°can be as large as 70 nm.

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Section: Experimental Measurement Of Quarterwaveplate Made Of Birefrimentioning

confidence: 98%

Temperature stabilized and broadband fiber waveplate fabricated with a birefringent photonic crystal fiber

Dong

Hao

et al. 2010

Front. Optoelectron. China

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“…Two beams light travel in opposite directions with respect to the magnetic field, and return to linear polarization states on passing through the quarter-wave retarder on the return trip, finally, they back together and interfered in polarizer and coupled to the detector. A phase shift caused by the magnetic field is produced between the two circularly polarized polarization modes in the sensing region, which is two times the single-pass Faraday rotation [4].…”

Section: Description Of Optical Polarization State In S-focsmentioning

confidence: 99%

“…Polarizer's performance influence measurement accuracy, imperfect polarizer will induce polarization state randomly coupling, and express intensity-type polarization error in S-FOCS [1,3,4].…”

Section: A Polarization Degree Error Of Polarized Light -Wavementioning

confidence: 99%

Optical Polarization Errors in Sagnac Fiber Optic Current Sensor

Wang¹,

Sun²,

Ji³

et al. 2013

Proceedings of the 2013 International Conference on Advanced Computer Science and Electronics Information

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-Sagnac fiber optic current sensor(S-FOCS) is a kind of precision instrument based on optical polarization and optical interference theory. There are several kinds of error characteristics from optical components in S-FOCS, including polarizer, integrated optical chip, quarter-wave retarder, sensing head and so on. With these errors, linearly polarized light wave in PM fiber and circularly polarized light wave in sensing fiber become elliptically polarized light wave, then, nonreciprocal phase shift induced by magnetic field of the current is interrupted by wrong polarization state. Focused on optical polarization error in S-FOCS, we analyze the characteristics of polarization errors associated with optical components in S-FOCS theoretically, and we demonstrate the methods to build optical polarization error models by using Poincare sphere and Jones matrix respectively. Then, based on model of polarization state in S-FOCS, we carry out simulation of polarization error characteristics in S-FOCS, and theoretically investigate the influence of several main error factors on optical polarization characteristics, including polarizer, phase delay in quarter-wave retarder, splice angular between quarter-wave retarder and PM fiber.

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“…If light wave passes a beat length in fiber, the phase shift between orthogonal birefringence axes is equal to 2π. If cutting a quarter beat length of the fiber, we can get a fiber-optic QWP [9] . If a birefringence holey fiber is used to make the fiber-optic QWP, the temperature instability of traditional fiber-optical QWP can be overcome.…”

Section: Introductionmentioning

confidence: 99%

Optimal design for elliptical holey fiber with stable polarization beat-length

Shi

Lin

2011

J. Shanghai Univ.(Engl. Ed.)

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In order to design birefringent holey fiber with beat-length independent of wavelength, an asymmetric structure is introduced to reduce its wavelength-sensitivity. The influence of structural parameters on the modal birefringence is calculated and analyzed. After optimizing the parameters, a flat dispersion curve of beat-length is obtained. The beat-length changes from 89.8 mm to 91.0 mm in wavelength range from 1.1 μm, to 1.7 μm, and its relative variation is 1.38%. If this fiber is made into zero-order quarter wave plate, the phase delay can be easily controlled in (90±1) • .

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Imperfect quarter-waveplate compensation in Sagnac interferometer-type current sensors

Cited by 75 publications

References 8 publications

Temperature stabilized and broadband fiber waveplate fabricated with a birefringent photonic crystal fiber

Temperature stabilized and broadband fiber waveplate fabricated with a birefringent photonic crystal fiber

Optical Polarization Errors in Sagnac Fiber Optic Current Sensor

Optimal design for elliptical holey fiber with stable polarization beat-length

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