Surface-corrugated microfiber Bragg grating

There are two steps to obtain as small as possible fiber Bragg gratings. First, it is to taper the fiber and reduce its diameter. A subwavelength-scale microfiber (MF) is the basic element of miniature fiber devices and sub-systems. Then it is to reduce the grating length. For short fiber grating, strong refractive index modulations are necessary. Strong refractive index modulations can be obtained inducing surface corrugation by alternating layers of different materials, one of which can be air. Several techniques have been proposed for the fabrication of surface-corrugated fiber gratings, including photorefractive inscription using etching, femtosecond lasers, and focused ion beam (FIB). So far, FIB is the most flexible and powerful tool for patterning, cross- sectioning or functionalizing a subwavelength circular MF due to its small and controllable spot size and high beam current density. In past two years, a number of ultra-compact surface corrugated microfiber Bragg gratings (SCMGs) have been successfully fabricated by FIB milling. The length of FIB milled SCGMs can be as small as tens of micrometers. In addition, there are several novel proposals on SCMG including wrapping a microfiber on a microstructure rod or put a microfiber on a surface-corrugated planar grating. In this paper, we will introduce recent advances in these ultra-small SCMGs and their characteristics and applications.

[1]  David J. Richardson,et al.  Optical fiber nanowires and microwires: fabrication and applications , 2009 .

[2]  Gilberto Brambilla,et al.  A microfluidic refractometric sensor based on gratings in optical fibre microwires. , 2009, Optics express.

[3]  W. Streifer,et al.  Analysis of two-dimensional waveguides with misaligned or curved gratings , 1978, IEEE Journal of Quantum Electronics.

[4]  Bai-Ou Guan,et al.  193 nm excimer laser inscribed Bragg gratings in microfibers for refractive index sensing. , 2011, Optics express.

[5]  Gilberto Brambilla,et al.  Fabrication of optical fibre nanowires and their optical and mechanical characterisation , 2006 .

[6]  Fei Xu,et al.  A Microfiber Bragg Grating Based on a Microstructured Rod: A Proposal , 2010, IEEE Photonics Technology Letters.

[7]  M. Jeong,et al.  Simultaneous Measurement of Refractive Index, Temperature, and Strain Using Etched-Core Fiber Bragg Grating Sensors , 2010, IEEE Photonics Technology Letters.

[8]  Hartmut Bartelt,et al.  High force measurement sensitivity with fiber Bragg gratings fabricated in uniform-waist fiber tapers , 2011 .

[9]  Ayman F. Abouraddy,et al.  Metal–insulator–semiconductor optoelectronic fibres , 2004, Nature.

[10]  Guillaume Laffont,et al.  Three-hole microstructured optical fiber for efficient fiber Bragg grating refractometer. , 2007, Optics letters.

[11]  B. Ipson,et al.  High-temperature sensing using surface relief fiber Bragg gratings , 2005, IEEE Photonics Technology Letters.

[12]  Ming Ding,et al.  A compact broadband microfiber Bragg grating. , 2011, Optics express.

[13]  Bai-Ou Guan,et al.  High-efficiency ultraviolet inscription of Bragg gratings in microfibers , 2012, IEEE Photonics Journal.

[14]  T A Birks,et al.  Modal coupling in fiber tapers decorated with metallic surface gratings. , 2006, Optics letters.

[15]  S. T. Peng,et al.  Improved perturbation analysis of dielectric gratings , 1975 .

[16]  Ping Lu,et al.  Fiber bragg gratings made with a phase mask and 800-nm femtosecond radiation. , 2003 .

[17]  Limin Tong,et al.  Compact microfiber Bragg gratings with high-index contrast. , 2011, Optics letters.

[18]  Jonathan C. Knight,et al.  Photonic crystal fibres , 2003, Nature.

[19]  Peter Horak,et al.  Optical microfiber coil resonator refractometric sensor: erratum. , 2007, Optics express.

[20]  Gilberto Brambilla,et al.  Fiber Bragg grating inscription by high-intensity femtosecond UV laser light: comparison with other existing methods of fabrication , 2005 .

[21]  Jing Feng,et al.  Microfiber-Based Bragg Gratings for Sensing Applications: A Review , 2012, Sensors.

[22]  Fei Xu,et al.  Optimized Design of Microcoil Resonators , 2007, Journal of Lightwave Technology.

[23]  Reginald K. Lee,et al.  Highly sensitive fiber Bragg grating refractive index sensors , 2005 .

[24]  Gilberto Brambilla,et al.  Preservation of Micro-Optical Fibers by Embedding , 2008 .

[25]  John Canning,et al.  Extreme Silica Optical Fibre Gratings , 2008, Sensors.

[26]  A. Cusano,et al.  Thinned fiber Bragg gratings as high sensitivity refractive index sensor , 2004, IEEE Photonics Technology Letters.

[27]  Yan-qing Lu,et al.  Ultra-highly sensitive surface-corrugated microfiber Bragg grating force sensor , 2012 .

[28]  T. Erdogan.  Fiber grating spectra , 1997 .

[29]  Yu Zhang,et al.  Refractive index sensing based on higher-order mode reflection of a microfiber Bragg grating. , 2010, Optics express.

[30]  D C Johnson,et al.  Photosensitization of optical fiber and silica-on-silicon/silica waveguides. , 1993, Optics letters.

[31]  K Nakajima,et al.  Cavity formation on an optical nanofiber using focused ion beam milling technique. , 2011, Optics express.

[32]  J. Bokor,et al.  Bragg gratings fabricated in monomode photosensitive optical fiber by UV exposure through a phase mask , 1993 .

[33]  K. Hakuta,et al.  Nanofibers with Bragg gratings from equidistant holes , 2011, 1103.1789.

[34]  Fei Xu,et al.  Miniaturized Metal-Dielectric-Hybrid Fiber Tip Grating for Refractive Index Sensing , 2011, IEEE Photonics Technology Letters.

[35]  Yan-qing Lu,et al.  Miniaturized fiber taper reflective interferometer for high temperature measurement. , 2010, Optics express.

[36]  S. T. Peng,et al.  TM-mode perturbation analysis of dielectric gratings , 1975 .

[37]  Axel Scherer,et al.  Lithographically Fabricated Optical Cavities for Refractive Index Sensing , 2005 .

[38]  Yan-qing Lu,et al.  Wave guiding properties and sensitivity of D-shaped optical fiber microwire devices , 2011 .

[39]  C. Liao,et al.  Femtosecond laser fabricated fiber Bragg grating in microfiber for refractive index sensing. , 2010, Optics letters.

[40]  E. Mazur,et al.  Femtosecond laser micromachining in transparent materials , 2008 .

[41]  D. Grobnic,et al.  Bragg grating evanescent field sensor made in biconical tapered fiber with femtosecond IR radiation , 2006, IEEE Photonics Technology Letters.

[42]  L.A. Wang,et al.  A wavelength- and loss-tunable band-rejection filter based on corrugated long-period fiber grating , 2001, IEEE Photonics Technology Letters.

[43]  Ming Ding,et al.  A Microfiber Cavity with Minimal-Volume Confinement , 2011 .

[44]  M. Ding,et al.  An Optical Fiber Tip Micrograting Thermometer , 2011, IEEE Photonics Journal.

[45]  A. Cusano,et al.  Refractive index sensor based on microstructured fiber Bragg grating , 2005, IEEE Photonics Technology Letters.

[46]  Yan-qing Lu,et al.  Demonstration of a compact temperature sensor based on first-order Bragg grating in a tapered fiber probe. , 2011, Optics express.

[47]  Hongying Zhu,et al.  Refractometric Sensors for Lab-on-a-Chip Based on Optical Ring Resonators , 2007, IEEE Sensors Journal.