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An acrylic-based asymmetric Y-branch plastic optical fiber (POF) coupler has been developed. The optical device is based on a Y-branch coupler design with a middle high index contrast waveguide taper and open space region for output fiber displacement. The middle waveguide taper is constructed on the acrylic block itself without using any additional optical waveguiding medium injected into the engraved taper region. The waveguide taper allows light rays to propagate by total internal reflection and this is achieved by having the material surrounding the waveguide taper to be of a lower refractive index (RI) than that of acrylic (RI of acrylic is 1.49). The area surrounding the waveguide taper has been designed in such a way that it is surrounded by an open air with an RI of 1.0. The high index contrast structure enables large splitting angle and shorter device length. Input and output POFs are inserted into this device structure in such a way that they are passively aligned to the middle waveguide taper structure. A simple attenuation technique based on lateral displacement of two fibers has been proposed and presented for the non-symmetrical coupling ratios. Numerical analysis has been made on the lateral displacement of the output fibers which shows that the device is able to generate non-symmetrical coupling ratios. A simple relationship between the coupling ratios and output fiber separation has been obtained. Device modeling has been performed using non-sequential ray tracing technique on the Y-branch coupler performing as a simple 3 dB coupler with excess loss of 1.83 dB and a coupling ratio of 50:50. The non-symmetrical coupling ratios of the device have been simulated by varying the lateral displacement of one output fiber from 0.1 mm to 4.4 mm. The results for the coupling ratios against the fiber displacement have been obtained and show how the device can be operated as an asymmetric Y-branch POF coupler.
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Tom
Strony
807--816
Opis fizyczny
Bibliogr. 12 poz.
Twórcy
autor
autor
- Institute of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, Malaysia
Bibliografia
- [1] ZIEMANN O., KRAUSER J., ZAMZOW P.E., DAUM W., POF Handbook: Optical Short Range Transmission System, 2nd Edition, Springer-Verlag, Berlin, 2008, pp. 233–293.
- [2] MIZUNO H., SUGIHARA O., KAINO T., OKAMOTO N., OHAMA M., Compact Y-branch-type polymeric optical waveguide devices with large-core connectable to plastic optical fibers, Japanese Journal of Applied Physics 44(2), 2005, pp. 8504–8506.
- [3] KLOTZBUECHER, T., BRAUNE T., DADIC D., SPRZAGALA M., KOCH A., Fabrication of optical 1×2 POF couplers using the laser-LIGA technique, Proceedings of SPIE 4941, 2003, pp. 121–132.
- [4] TAKEZAWA Y., AKASAKA S., OHARA S., ISHIBASHI T., ASANO H., TAKETANI N., Low excess losses in a Y-branching plastic optical waveguide formed through injection molding, Applied Optics 33(12), 1994, pp. 2307–2312.
- [5] SUZUKI S., KITOH T., INOUE Y., YAMADA Y., HIBINO Y., MORIWAKI K., YANAGISAWA M., Integrated optic Y-branching waveguides with an asymmetric branching ratio, Electronics Letters 32(8), 1996, pp. 735–736.
- [6] KUROKAWA H., KAWASHIMA H., KASAI H., KURODA M., YOSHIMURA T., ASAM K., An asymmetric optical splitter and its application to optical monitoring devices, LEOS 14th Annual Meeting of the IEEE, Vol. 1, San Diego, USA, 2001, pp. 232–233.
- [7] HAN-BIN LIN, JUNG-YOUNG SU, REI-SHIN CHENG, WAY-SEEN WANG, Novel optical single-mode asymmetric Y-branches for variable power splitting, IEEE Journal of Quantum Electronics 35(7), 1999, pp. 1092–1096.
- [8] HENRY W.M., LOVE J.D., Asymmetric multimode Y-junction splitters, Optical and Quantum Electronics 29(3), 1997, pp. 379–392.
- [9] EHSAN A.A., SHAARI S., ABD-RAHMAN M.K., Metal-based 1×2 and 1×4 asymmetric plastic optical fiber couplers for optical code generating devices, Progress In Electromagnetics Research 101, 2010, pp. 1–16.
- [10] EHSAN A.A., Plastic Optical Fiber Couplers for Portable Optical Access-Card System, PhD Thesis, Universiti Teknologi MARA, UiTM, Shah Alam, Malaysia, 2010.
- [11] WEINERT A., Plastic Optical Fibers: Principles, Components and Installation, MCD Verlag, Munich, 1999, p. 112.
- [12] EHSAN A.A., SHAARI S., ABD-RAHMAN M.K., Plastic optical fiber coupler with high index contrast waveguide taper, Progress In Electromagnetics Research C 20, 2011, pp. 125–138.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BPW7-0019-0040