Experimental measurement and numerical analysis of fused taper shape for optical fiber coupler

Abstract

To find out the effect of the shape of fused taper region on the optical fiber coupler, the fiber couplers were fabricated at different drawing speeds with a six-axes fiber coupler machine. The results, which were obtained from the shape of fused taper region measured with microscope, show that there is a close correlation between the cone angle and optical performance of fiber coupler. High-performance fiber coupler cannot be obtained until rheological shape is controlled accurately. The numerical analysis model, which was built based on generalized Maxwell viscoelastic theory, is resolved with ANSYS software. The calculated results accord with the experimental data. It can apply a theoretic basis for forecasting the shape of fiber coupler fabricated under the conditions of different technological parameters.

Keywords

optical fiber coupler / fused biconical taper / viscoelastic model / rheological shape

References

[1] PalB. P., ChaudhuriP. R.. Fabrication and modeling of fused biconical tapered fiber couplers[J]. Fiber and Integrated Optics, 2003, 22(2): 97-117

[2] HsiehC. S., WuT. L., ChengW. H.. An optimum approach for fabrication of low loss fused fiber couplers[J]. Materials Chemistry and Physics, 2001, 69(1): 199-203

[3] ChaudhuriP. R., PalB. P.. Understanding coupling mechanism in fused fiber coupler-based components: Role of core and cladding modes[J]. The International Society for Optical Engineering, 2001, 4417: 403-411

[4] KwangY. S., HwangI. K., YunS. H.. High performance fused-type mode selective coupler for two-mode fiber devices[J]. Optical Fiber Communication Conference, 2000, 37(1): 32-36

[5] EomJ. B., KimJ., MoonD. S.. Single-mode propagation in a photonic crystal fiber coupler[C]. Optical Fiber Communication Conference, Anaheim, CA, USA, 2002, 1(1): 498-507

[6] YaoS. H., HorvathV. K.. Measurements of the instantaneous velocity difference and the local velocity with a fiber-optic coupler[J]. Journal of the Optical Society of America A: Optics and Image Science, 2001, 18(3): 696-703

[7] YangY.-h., WuDi.. Experimental study on fused fiber coupler[J]. The International Society for Optical Engineering, 2001, 4603: 6-9

[8] ShuaiC. J., DuanJ. A., ZhongJ.. Technical sensitiveness in the rheological manufacture progress of fused taper coupler[J]. Optics and Precision Engineering, 2005, 13(1): 40-44

[9] NagataH.. Chemical properties of fused fiber coupler surface[J]. Optical Fiber Technology, 2000, 6(3): 324-328

[10] DoremusR. H.. Melt viscosities of silicate glasses[J]. Journal of American Ceramic Society, 2003, 82(3): 105-110

[11] ThomasF. S.. Finite-element calculation of stresses in glass parts undergoing viscous relaxation[J]. Journal of American Ceramic Society, 1987, 70(2): 90-95

[12] GeorgeW. S.. Theories of relaxation[J]. Journal of Non-Crystalline Solids, 1990, 123(1/3): 75-89

[13] SakaguchiS. T.. Viscosity of silica core optical fiber[J]. Journal of Non-Crystalline Solids, 1999, 244(2): 232-237