Open-loop fiber-optic gyroscope with a double sensitivity employing a polarization splitter and Faraday rotator mirror

Wu, Weiran; Zhou, Kai; Lu, Chengjie; Xian, Tuohua

doi:10.1364/ol.43.005861

Cited by 13 publications

(5 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We compute the transmissions T x , T y and phase shifts φ x , φ y of x-and y-polarized plane waves for all mutual values of the elliptical axes D x and D y in the range of 0.2P − 0.8P by using commercial FDTD Solutions (The simulated results are not shown here). Then, we select nine elliptical pillars that satisfy the phase condition in (2) to form the supercell. Fig.…”

Section: Theoretical Analysesmentioning

confidence: 99%

Nanoscale Noncoplanar Beam Splitters With Tunable Split Ratio

Tian

Guo

et al. 2020

IEEE Photonics J.

View full text Add to dashboard Cite

Beam splitters, especially those with tunable split ratios, play significant role in interferometers, spectrometers, and communication systems. To this end, we proposed a polarization-controllable beam splitter based on dielectric metasurface composed of an array of dielectric pillars. The dielectric metasurface presents phase gradients along two orthogonal directions, say, x-and y-axis, with each phase gradient applicable to one of two orthogonal linear polarizations. Due to the orthogonality of the dual phase gradients in both position and polarization, an elliptically polarized incident beam can be diffracted into two refracted beams, one lies within xoz plane and the other in yoz plane. More importantly, the split ratio of the two refracted beams is continuously tunable by changing the ellipticity of incident beam. Under extreme case, x-or y-polarized incident beam is refracted into one beam, but in different planes for different kind of linear polarization. Besides, the refracted angle of each refracted beam in respective refracted plane can be easily set by adjusting the phase difference of adjacent rows or columns of metasurface. With same method, a polarization-controllable dual-wavelength beam splitter is also achieved on the basis of phase-gradient metasurface. Such a noncoplanar beam splitter with tunable split ratios may play significant role in novel miniature optical devices and systems.

show abstract

Section: Theoretical Analysesmentioning

confidence: 99%

Nanoscale Noncoplanar Beam Splitters With Tunable Split Ratio

Tian

Guo

et al. 2020

IEEE Photonics J.

View full text Add to dashboard Cite

show abstract

“…Therefore, it is not feasible to improve the sensitivity of IFOGs by simply increasing the length and surrounding area of fiber coils. K. Zhou et al proposed a fiber gyroscope with a double sensitivity employing a polarization splitter made with an evanescent coupling technology [32] and W. Wu et al further improved the method by adding a faraday rotator in open-loop fiber-optic gyroscope [33]; however, there exist obvious coupling errors and losses in the evanescent coupling theory based polarization splitter.…”

Section: Mainly Aimsmentioning

confidence: 99%

A Novel Approach to Double the Sensitivity of Polarization Maintaining Interferometric Fiber Optic Gyroscope

Zhang

Liang

2020

Sensors

View full text Add to dashboard Cite

In this paper, a novel optical approach to double the sensitivity to angular rate of interferometric fiber optic gyroscope (IFOG) is proposed. Two fiber polarization combiner/splitters (FPCSs), as the key components, are added in the traditional IFOG light path. The FPCSs are able to either combine two orthogonal polarizations transmitting at two different polarization-maintaining fibers (PMFs) into the two orthogonal axes of one PMF, respectively, or split two polarizations transmitting at the two orthogonal axes of one PMF into two polarizations to transmit at two different PMFs, respectively. Through the specific placement and coupling of these two FPCSs, the incident light can transmit twice along the polarization-maintaining fiber coil (PMFC). The novel approach is verified experimentally and the experimental results show consistency with the theoretical analysis. The proposed approach is able to double the sensitivity of IFOGs and can increase the signal-to-noise ratio (SNR) without increasing the length of PMFC, which is very susceptible to environmental influences and is of great significance in the technical improvement of IFOGs, as well as the miniaturization of IFOGs.

show abstract

“…Beam deflectors and splitters play a critical role in various optical and photonic systems, such as optical holography, spectroscopy, interferometers, sensing, and optical communications [ 1 , 2 , 3 , 4 ]. Traditional optics for beam deflecting and splitting, such as lenses and triangular prisms, are bulky and heavy, which limits their applications in compact optical systems [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Quasi-Freeform Metasurfaces for Wide-Angle Beam Deflecting and Splitting

et al. 2023

View full text Add to dashboard Cite

Metasurfaces attracted extensive interests due to their outstanding ability to manipulate the wavefront at a subwavelength scale. In this study, we demonstrated quasi-freeform metasurfaces in which the radius, location, and height of the nanocylinder building blocks were set as optimized structure parameters, providing more degrees of freedom compared with traditional gradient metasurfaces. Given a desired wavefront shaping objective, these structure parameters can be collectively optimized utilizing a hybrid optimized algorithm. To demonstrate the versatility and feasibility of our method, we firstly proposed metasurfaces with deflecting efficiencies ranging from 86.2% to 94.8%, where the deflecting angles can vary in the range of 29°–75.6°. With further study, we applied our concept to realize a variety of high-efficiency, wide-angle, equal-power beam splitters. The total splitting efficiencies of all the proposed beam splitters exceeded 89.4%, where a highest efficiency of 97.6%, a maximum splitting angle of 75.6°, and a splitting uniformity of 0.33% were obtained. Considering that various deflecting angles, and various splitting channels with different splitting angles, can be realized by setting the optical response of metasurfaces as the optimization target, we believe that our method will provide an alternative approach for metasurfaces to realize desired wavefront shaping.

show abstract

Open-loop fiber-optic gyroscope with a double sensitivity employing a polarization splitter and Faraday rotator mirror

Cited by 13 publications

References 10 publications

Nanoscale Noncoplanar Beam Splitters With Tunable Split Ratio

Nanoscale Noncoplanar Beam Splitters With Tunable Split Ratio

A Novel Approach to Double the Sensitivity of Polarization Maintaining Interferometric Fiber Optic Gyroscope

Quasi-Freeform Metasurfaces for Wide-Angle Beam Deflecting and Splitting

Contact Info

Product

Resources

About