%0 Journal Article %1 Oh:04 %A Oh, Seungtae %A Lee, Kyung Rok %A Paek, Un-Chul %A Chung, Youngjoo %D 2004 %I OSA %J Opt. Lett. %K CO2 Fabrication fiber grating helical laser long-period %N 13 %P 1464--1466 %R 10.1364/OL.29.001464 %T Fabrication of helical long-period fiber gratings by useof a CO2 laser %U http://ol.osa.org/abstract.cfm?URI=ol-29-13-1464 %V 29 %X We present a method of helical long-period fiber grating (H-LPFG) fabrication by use of a CO2 laser for use as an optical torque sensor. A conventional optical fiber grating has periodic vertical index changes along its fiber axis, but a H-LPFG has a screw-type index modulation. The helical index modulation is obtained with the asymmetric index change caused by a single-side laser beam exposure. The H-LPFG shows peak shifts with codirectional or contradirectional torsion to the helix. Also, the polarization-dependent loss is measured to be relatively small compared with that of a conventional long-period fiber grating.

@article{Oh:04, abstract = {We present a method of helical long-period fiber grating (H-LPFG) fabrication by use of a CO2 laser for use as an optical torque sensor. A conventional optical fiber grating has periodic vertical index changes along its fiber axis, but a H-LPFG has a screw-type index modulation. The helical index modulation is obtained with the asymmetric index change caused by a single-side laser beam exposure. The H-LPFG shows peak shifts with codirectional or contradirectional torsion to the helix. Also, the polarization-dependent loss is measured to be relatively small compared with that of a conventional long-period fiber grating.}, added-at = {2012-07-19T13:06:22.000+0200}, author = {Oh, Seungtae and Lee, Kyung Rok and Paek, Un-Chul and Chung, Youngjoo}, biburl = {https://www.bibsonomy.org/bibtex/244d88b7a1300e7f6fd63189b66d1b1bf/angman}, doi = {10.1364/OL.29.001464}, file = {:Oh.pdf:PDF}, groups = {public}, interhash = {958477363eb2bac3857c08a5d56d5e38}, intrahash = {44d88b7a1300e7f6fd63189b66d1b1bf}, journal = {Opt. Lett.}, keywords = {CO2 Fabrication fiber grating helical laser long-period}, month = {July}, number = 13, pages = {1464--1466}, publisher = {OSA}, timestamp = {2012-07-25T22:01:41.000+0200}, title = {Fabrication of helical long-period fiber gratings by useof a CO2 laser}, url = {http://ol.osa.org/abstract.cfm?URI=ol-29-13-1464}, username = {angman}, volume = 29, year = 2004 }