title: CO2 laser induced long period gratings in optical microfibers.
abstract: Long period gratings (LPGs) are fabricated by use of focused high frequency CO(2) laser pulses to periodically modify the transverse dimension of silica microfibers. A 20-period LPG with a 27 dB attenuation dip is realized in a microfiber with a diameter of approximately 6.3 microm. The resonant wavelength has a negative temperature coefficient and a high sensitivity to external refractive index. The microfiber LPGs may be useful in micron scale in-fiber devices and sensors.
authors.affiliation: Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong.
authors.forename: Haifeng
authors.initials: H
authors.lastname: Xuan
authors.forename: Wei
authors.initials: W
authors.lastname: Jin
authors.forename: Min
authors.initials: M
authors.lastname: Zhang
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D005336:Fiber Optic Technology; D007834:Lasers; D054020:Lasers, Gas; D008422:Materials Testing; D055100:Optical Fibers; D055095:Optics and Photonics; D012031:Refractometry; D013696:Temperature; D013718:Tensile Strength