Fused fiber micro-knots.

We present fusing of a fiber micro-knot by a CO2 laser beam. We demonstrate tuning of the coupling strength and tuning of the spectral resonance of the micro-knot by the fusing process. The experimental results reveal that fusing the fiber micro-knots increases the coupling efficiency and improves the robustness and the stability of the micro-knots.

[1]  Kok-Sing Lim,et al.  Current sensor based on microfiber knot resonator , 2011 .

[2]  O. Schwelb,et al.  Transmission, group delay, and dispersion in single-ring optical resonators and add/drop filters-a tutorial overview , 2004, Journal of Lightwave Technology.

[3]  Jianhui Yu,et al.  Optically tunable microfiber-knot resonator. , 2011, Optics express.

[4]  D.J. DiGiovanni,et al.  The microfiber loop resonator: theory, experiment, and application , 2006, Journal of Lightwave Technology.

[5]  Hui Ding,et al.  All-fiber magnetic-field sensor based on microfiber knot resonator and magnetic fluid. , 2012, Optics letters.

[6]  Limin Tong,et al.  Microfiber Optical Sensors: A Review , 2014, Sensors.

[7]  Limin Tong,et al.  Modeling optical microfiber loops for seawater sensing. , 2012, Applied optics.

[8]  P. Dumon,et al.  Silicon microring resonators , 2012 .

[9]  Yunjiang Rao,et al.  Miniature interferometric humidity sensors based on silica/polymer microfiber knot resonators , 2011 .

[10]  Yunjiang Rao,et al.  Miniature fiber-optic temperature sensors based on silica/polymer microfiber knot resonators , 2009, International Conference on Optical Fibre Sensors.

[11]  Limin Tong,et al.  Single-mode guiding properties of subwavelength-diameter silica and silicon wire waveguides. , 2004, Optics express.

[12]  Limin Tong,et al.  Demonstration of optical microfiber knot resonators , 2006 .

[13]  Yu Wu,et al.  MOEMS Accelerometer Based on Microfiber Knot Resonator , 2009, IEEE Photonics Technology Letters.

[14]  Limin Tong,et al.  All-fiber add-drop filters based on microfiber knot resonators. , 2007, Optics letters.