Results 201 to 210 of about 3,011 (223)

Flexible fabrication of long-period in-fiber gratings

Technical Digest. Summaries of Papers Presented at the Conference on Lasers and Electro-Optics. Conference Edition. 1998 Technical Digest Series, Vol.6 (IEEE Cat. No.98CH36178), 1998
We have demonstrated a novel, simple, low-cost and all-fiber interrogation technique for a strain/temperature fiber Bragg sensor using a long-period grating. We show the schematic diagram of the demodulation scheme. The amount of light transmitted by the long-period grating is determined by its wavelength and is therefore proportional to the wavelength
L.A. Everall, R.W. Fallon, J.A.R. Williams, L. Zhang, I. Bennion   +4 more
openaire   +1 more source

A study on dispersion of long-period fiber gratings

Technical Digest. CLEO/Pacific Rim '99. Pacific Rim Conference on Lasers and Electro-Optics (Cat. No.99TH8464), 2003
Long-period fiber gratings (LPFG) have recently emerged as a candidate for a number of applications, including those related to wavelength-division-multiplexing (WDM) fiber-optic communication. Although some papers have presented analytical treatment of LPFG structures in the past, there has been no report thus far on theoretical calculation of the ...
null Dongwook Park, null Joon Hwan Hwang
openaire   +1 more source

Long-Period Fiber Gratings and their Sensing Applications

International Conference on Fibre Optics and Photonics, 2012
Long-period gratings (LPGs) in optical fibers for sensing are discussed, especially on strain and temperature sensing. Low-cost fabrication by a low-pressure mercury-lamp exposure was described. LPGs in high-birefringence fiber had high strain sensitivity.
Toru Mizunami, Toshihiro Mori, Tsubasa Fujiyoshi   +2 more
openaire   +1 more source

Hermetic sealing of long period fiber gratings

Proceedings of SPIE, 2006
A method of writing long period grating and a model to explain light coupling between fundamental mode and cladding mode are presented. One athermal hermetic sealing approach is proposed to form hermetic sealing long period fiber grating. A long period fiber grating was designed and written for this experiment.
Chengxin Yang, Baoping Guo, Jin-Hua Kim
openaire   +1 more source

Wavelength tunable long-period fiber grating

Fifth Asia-Pacific Conference on ... and Fourth Optoelectronics and Communications Conference on Communications,, 1999
Wavelength tunable long-period fiber gratings in specially designed optical fibers, which have temperature sensitivity of /spl plusmn/15 nm/100/spl deg/C, have been developed. The temperature sensitivity was three times greater than that in dispersion shifted fiber.
M. Shigehara, T. Enomoto, S. Ishikawa, M. Harumoto, H. Kanamori   +4 more
openaire   +1 more source

Step-changed long-period fiber gratings

IEEE Photonics Technology Letters, 2002
The spectral characteristics of a new type of long-period grating (LPG) structure, step-changed LPG, are investigated theoretically and experimentally. It is shown that the spectral profile of such gratings can be tailored by adjusting the step parameters. A good agreement between simulated results and measured spectra is obtained. This type of LPG has
Guan, BO, Zhang, AP, Tam, HY, Chan, HLW, Choy, CL, Tao, X, Demokan, S   +6 more
openaire   +2 more sources

Photonic crystal fiber long-period gratings for biochemical sensing

Optics Express, 2006
Martin Dufva, Ole Bang, Jesper B Jensen   +2 more
exaly  

Characteristics of Dissimilar-Fiber Long-Period Fiber Gratings

Frontiers in Optics 2016, 2016
Pengfei Wang, Thomas K. Gaylord
openaire   +1 more source

Simultaneous measurement of temperature and strain using dual long-period fiber gratings with controlled temperature and strain sensitivities

Optics Express, 2003
Jeeun Kang, Young-Geun Han, Chang Seok Kim   +2 more
exaly  

All-fiber mode converter based on long-period fiber gratings written in few-mode fiber

Optics Letters, 2017
Chengbo Mou, Chenyi Zhang, Yunqi Liu
exaly