Mullaney, KevinStaines, StephenJames, StephenTatam, Ralph P.2017-12-072017-12-072017-04-23K. Mullaney; S.E. Staines; S.W. James; R.P. Tatam, Optimised process for fabricating tapered long period gratings, 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Republic of Korea.0277-786Xhttp://dx.doi.org/10.1117/12.2263275https://dspace.lib.cranfield.ac.uk/handle/1826/12736The process of fabricating tapered long period gratings (TLPGs) using a CO2 laser is described. TLPGs with a period spacing of 378 μm, were fabricated by optimization of the taper waist diameter and careful control of the duty-cycle and its uniformity along the length of the grating. The 6-period TLPGs exhibited a pass-band insertion loss of 0.6 dB, resonance band extinction values of 3 dB and had a physical length of 2.27 mm.enThis paper was published in 25th International Conference on Optical Fiber Sensors and is made available with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.Conference paper