The Experts below are selected from a list of 261 Experts worldwide ranked by ideXlab platform

Libo Yuan - One of the best experts on this subject based on the ideXlab platform.

  • Asymmetrical twin-Core fiber based Michelson interferometer for environmental refractive index sensing
    2017 25th Optical Fiber Sensors Conference (OFS), 2017
    Co-Authors: Shaoxian Zhang, Tingting Yuan, Libo Yuan
    Abstract:

    We presented a type of refractive index sensor based on Michelson interferometer by using asymmetrical twin-Core fiber. The central-Core and Side-Core of the asymmetrical twin-Core fiber are used as the reference arm and sensor arm respectively, and the D-shape Side-polish sensing region are fabricated on the sensing arm by the Side-polishing technique. The optical path difference is formed between the two arms due to the sensing region of the Side-Core sensitive to the change of the surrounding refractive index. Thus, through the reflection of the end and taper of the fiber to achieve the interference of transmission to form Michelson interferometer. Therefore, the changes of the surrounding will lead to the shift of the transmission spectrum to reach the purpose of the sensing. The experimental results show that the device has a maximum refractive index sensitivity of about -80nm/RIU in the range of 1.333-1.3824 and the result is basically consistent with the simulation. This sensor is a simple structure and convenient in its production advantages, and can be used in many areas such as biological sensing and chemical sensing.

  • Asymmetrical Twin-Core Fiber Based Michelson Interferometer for Refractive Index Sensing
    Journal of Lightwave Technology, 2011
    Co-Authors: Ai Zhou, Yanhui Zhang, Guangping Li, Jun Yang, Yuzhuo Wang, Chunying Guan, Libo Yuan
    Abstract:

    An asymmetrical twin-Core fiber based Michelson interferometer is reported as a refractive index sensor. One Core of the twin-Core fiber locates at the fiber center and the other Core is 26 μ m away from the central Core. Part of the cladding of the twin-Core fiber over a small length is removed by chemical etching to make the effective refractive index of the fundamental mode of the Side Core is sensitive to the ambient refractive index. Therefore, the interference spectrum between the central Core and the Side Core shifts with the variation of the ambient refractive index. The sensitivity of such a Michelson interferometer is ~ 270 nm/RIU in the range of 1.34-1.38.

  • Optical refractometer based on an asymmetrical twin-Core fiber Michelson interferometer
    Optics Letters, 2011
    Co-Authors: Ai Zhou, Yanhui Zhang, Guangping Li, Jun Yang, Yuzhuo Wang, Fengjun Tian, Libo Yuan
    Abstract:

    We report and demonstrate an optical refractometer based on a compact fiber Michelson interferometer. The Michelson interferometer is composed of an asymmetrical twin-Core fiber containing a central Core and a Side Core. By chemically etching a segment of the twin-Core fiber until the Side Core is exposed, the effective index of the Side Core in the etched region is sensitive to the environmental refractive index, which leads to a shift of the transmission spectrum of the Michelson interferometer. The experimental results show that such a device has a refractive index resolution of more than 800 nm/refractive index unit in the range of 1.34–1.37.

Ai Zhou - One of the best experts on this subject based on the ideXlab platform.

  • An in-fiber refractometer based on asymmetrical twin-Core fiber
    2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 2011
    Co-Authors: Yanhui Zhang, Ai Zhou, Guangping Li, Quan Xu, Tuo Zheng
    Abstract:

    We demonstrate a compact fiber Michelson interferometer for refractive index (RI) sensing which is composed of an asymmetrical twin-Core fiber (TCF) with a central Core and a Side Core. By chemical etching a segment of the TCF to make the Side Core is nearly exposed, the effective RI of the Side Core mode is sensitive to the RI change of the external medium. Therefore, the optical path length difference between the central and Side Cores will vary with the ambient refractive index, which leads to a shift of the transmission spectrum of the Michelson interferometer. The experimental results show that the device has a refractive index resolution of ~10 -5 in the range of 1.34-1.38.

  • Asymmetrical Twin-Core Fiber Based Michelson Interferometer for Refractive Index Sensing
    Journal of Lightwave Technology, 2011
    Co-Authors: Ai Zhou, Yanhui Zhang, Guangping Li, Jun Yang, Yuzhuo Wang, Chunying Guan, Libo Yuan
    Abstract:

    An asymmetrical twin-Core fiber based Michelson interferometer is reported as a refractive index sensor. One Core of the twin-Core fiber locates at the fiber center and the other Core is 26 μ m away from the central Core. Part of the cladding of the twin-Core fiber over a small length is removed by chemical etching to make the effective refractive index of the fundamental mode of the Side Core is sensitive to the ambient refractive index. Therefore, the interference spectrum between the central Core and the Side Core shifts with the variation of the ambient refractive index. The sensitivity of such a Michelson interferometer is ~ 270 nm/RIU in the range of 1.34-1.38.

  • Optical refractometer based on an asymmetrical twin-Core fiber Michelson interferometer
    Optics Letters, 2011
    Co-Authors: Ai Zhou, Yanhui Zhang, Guangping Li, Jun Yang, Yuzhuo Wang, Fengjun Tian, Libo Yuan
    Abstract:

    We report and demonstrate an optical refractometer based on a compact fiber Michelson interferometer. The Michelson interferometer is composed of an asymmetrical twin-Core fiber containing a central Core and a Side Core. By chemically etching a segment of the twin-Core fiber until the Side Core is exposed, the effective index of the Side Core in the etched region is sensitive to the environmental refractive index, which leads to a shift of the transmission spectrum of the Michelson interferometer. The experimental results show that such a device has a refractive index resolution of more than 800 nm/refractive index unit in the range of 1.34–1.37.

Sanjeev Bedi - One of the best experts on this subject based on the ideXlab platform.

  • Image processing-based accessibility analysis method for determining undercut-free parting direction
    The International Journal of Advanced Manufacturing Technology, 2013
    Co-Authors: Rajnish Bassi, Sanjeev Bedi
    Abstract:

    In injection molding, demoldability of a part without the use of a Side Core is possible only if all of its surfaces are fully accessible in the parting direction. A mold surface may be fully accessible from some directions, but may not be accessible from other directions. Therefore, to determine the undercut-free parting direction, an algorithm is developed that evaluates the accessibility of each part surface from a set of directions (called as candidate parting directions) by using image processing techniques. In the proposed methodology, the surface accessibility is determined by comparing the projected area of each surface on the image plane in the presence of other part surfaces to that of the same surface in the absence of other part surfaces. The algorithm can be used to determine the accessibility of planar, ruled, and free-form surfaces without tessellating the part surfaces. The algorithm includes a method that can also successfully classify surfaces that are oriented perpendicular to the parting direction. The surface classification can be used to identify the undercut-free parting direction, recognize the various undercut features, and form the visibility maps. The accuracy of the algorithm depends upon the number of pixels used to represent the part on the computer screen. The method has been successfully implemented, and test results are discussed in this paper.

  • Automatic recognition of intersecting features for Side Core design in two-piece permanent molds
    The International Journal of Advanced Manufacturing Technology, 2010
    Co-Authors: Rajnish Bassi, N. Venkata Reddy, Sanjeev Bedi
    Abstract:

    The automatic recognition of molding features (protrusions, depressions, and their intersections), Core, and cavity surfaces plays an important role in shortening the lead time in mold design and manufacturing as well as aiding the Side Core design. Consequently, in this paper, an automatic mold feature recognition system to recognize protrusion, depression as well as intersecting depression features is proposed and implemented. The recognition of various types of intersecting features is a significant contribution to the literature. The output generated by the accessibility analysis (without discretizing the part) is used as the input to the feature recognition module. The newly developed system is assessed by comparing its results with those of earlier systems. A comprehensive case study is presented that can demonstrate the additional capabilities of the proposed system to those of the present in the published literature.

Yanhui Zhang - One of the best experts on this subject based on the ideXlab platform.

  • An in-fiber refractometer based on asymmetrical twin-Core fiber
    2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 2011
    Co-Authors: Yanhui Zhang, Ai Zhou, Guangping Li, Quan Xu, Tuo Zheng
    Abstract:

    We demonstrate a compact fiber Michelson interferometer for refractive index (RI) sensing which is composed of an asymmetrical twin-Core fiber (TCF) with a central Core and a Side Core. By chemical etching a segment of the TCF to make the Side Core is nearly exposed, the effective RI of the Side Core mode is sensitive to the RI change of the external medium. Therefore, the optical path length difference between the central and Side Cores will vary with the ambient refractive index, which leads to a shift of the transmission spectrum of the Michelson interferometer. The experimental results show that the device has a refractive index resolution of ~10 -5 in the range of 1.34-1.38.

  • Asymmetrical Twin-Core Fiber Based Michelson Interferometer for Refractive Index Sensing
    Journal of Lightwave Technology, 2011
    Co-Authors: Ai Zhou, Yanhui Zhang, Guangping Li, Jun Yang, Yuzhuo Wang, Chunying Guan, Libo Yuan
    Abstract:

    An asymmetrical twin-Core fiber based Michelson interferometer is reported as a refractive index sensor. One Core of the twin-Core fiber locates at the fiber center and the other Core is 26 μ m away from the central Core. Part of the cladding of the twin-Core fiber over a small length is removed by chemical etching to make the effective refractive index of the fundamental mode of the Side Core is sensitive to the ambient refractive index. Therefore, the interference spectrum between the central Core and the Side Core shifts with the variation of the ambient refractive index. The sensitivity of such a Michelson interferometer is ~ 270 nm/RIU in the range of 1.34-1.38.

  • Optical refractometer based on an asymmetrical twin-Core fiber Michelson interferometer
    Optics Letters, 2011
    Co-Authors: Ai Zhou, Yanhui Zhang, Guangping Li, Jun Yang, Yuzhuo Wang, Fengjun Tian, Libo Yuan
    Abstract:

    We report and demonstrate an optical refractometer based on a compact fiber Michelson interferometer. The Michelson interferometer is composed of an asymmetrical twin-Core fiber containing a central Core and a Side Core. By chemically etching a segment of the twin-Core fiber until the Side Core is exposed, the effective index of the Side Core in the etched region is sensitive to the environmental refractive index, which leads to a shift of the transmission spectrum of the Michelson interferometer. The experimental results show that such a device has a refractive index resolution of more than 800 nm/refractive index unit in the range of 1.34–1.37.

Guangping Li - One of the best experts on this subject based on the ideXlab platform.

  • An in-fiber refractometer based on asymmetrical twin-Core fiber
    2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 2011
    Co-Authors: Yanhui Zhang, Ai Zhou, Guangping Li, Quan Xu, Tuo Zheng
    Abstract:

    We demonstrate a compact fiber Michelson interferometer for refractive index (RI) sensing which is composed of an asymmetrical twin-Core fiber (TCF) with a central Core and a Side Core. By chemical etching a segment of the TCF to make the Side Core is nearly exposed, the effective RI of the Side Core mode is sensitive to the RI change of the external medium. Therefore, the optical path length difference between the central and Side Cores will vary with the ambient refractive index, which leads to a shift of the transmission spectrum of the Michelson interferometer. The experimental results show that the device has a refractive index resolution of ~10 -5 in the range of 1.34-1.38.

  • Asymmetrical Twin-Core Fiber Based Michelson Interferometer for Refractive Index Sensing
    Journal of Lightwave Technology, 2011
    Co-Authors: Ai Zhou, Yanhui Zhang, Guangping Li, Jun Yang, Yuzhuo Wang, Chunying Guan, Libo Yuan
    Abstract:

    An asymmetrical twin-Core fiber based Michelson interferometer is reported as a refractive index sensor. One Core of the twin-Core fiber locates at the fiber center and the other Core is 26 μ m away from the central Core. Part of the cladding of the twin-Core fiber over a small length is removed by chemical etching to make the effective refractive index of the fundamental mode of the Side Core is sensitive to the ambient refractive index. Therefore, the interference spectrum between the central Core and the Side Core shifts with the variation of the ambient refractive index. The sensitivity of such a Michelson interferometer is ~ 270 nm/RIU in the range of 1.34-1.38.

  • Optical refractometer based on an asymmetrical twin-Core fiber Michelson interferometer
    Optics Letters, 2011
    Co-Authors: Ai Zhou, Yanhui Zhang, Guangping Li, Jun Yang, Yuzhuo Wang, Fengjun Tian, Libo Yuan
    Abstract:

    We report and demonstrate an optical refractometer based on a compact fiber Michelson interferometer. The Michelson interferometer is composed of an asymmetrical twin-Core fiber containing a central Core and a Side Core. By chemically etching a segment of the twin-Core fiber until the Side Core is exposed, the effective index of the Side Core in the etched region is sensitive to the environmental refractive index, which leads to a shift of the transmission spectrum of the Michelson interferometer. The experimental results show that such a device has a refractive index resolution of more than 800 nm/refractive index unit in the range of 1.34–1.37.