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Long-period fiber gratings based on periodic microbends
Optics Letters, 1999We demonstrate a new type of high-performance long-period fiber grating based on arc-induced periodic microbends. The fabrication method is simple and does not require special fibers. Flexibility in controlling the filter parameters makes it possible to produce arbitrary filter profiles by use of a simple apodization technique, which is difficult to do
In Kag Hwang +2 more
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All-optical switching in long-period fiber gratings
Optics Letters, 1997Nonlinear pulse propagation in long-period fiber gratings is studied with a mode-locked Q -switched laser pulse approximately 80ps in duration at a wavelength of 1.05 microm . Optical switching, pulse reshaping, and optical limiting are found at intensities in the range of 1-20 GW/cm(2).
R E Slusher, J B Stark, A M Vengsarkar
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Dispersion control with use of long-period fiber gratings
Journal of the Optical Society of America A: Optics and Image Science, and Vision, 2000Chirped long-period fiber gratings are analyzed for management of dispersion in optical fiber communications systems. A ray model is used to derive simple analytic expressions that describe the transmission, chromatic delay, and dispersion properties of chirped long-period fiber gratings. A numerical model based on coupled-mode theory is used to verify
T Erdogan
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Tunable mechanically induced long-period fiber gratings
Optics Letters, 2000We report the experimental characterization of mechanically induced long-period fiber gratings (LPFG's) made by pressing a plate with periodic grooves against a short length of fiber. This filter, which is simple and inexpensive, exhibits transmission spectra and temperature stability similar to those of photoinduced LPFG's.
M J F Digonnet, H J Shaw
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Bending sensitivity of in-series long-period fiber gratings
Optics Letters, 1998The interference fringes formed in a long-period fiber grating pair are sensitive to the loss in the cladding mode, which can be induced by bending or by coating on the fiber. Assuming that there is no loss and that both gratings are identical, the interference fringes are shown to have 100% contrast when each grating has 50% transmissivity.
Byeong Ha Lee
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Optical fiber long-period grating sensors
Optics Letters, 1996We present a novel class of highly sensitive sensors based on long-period fiber gratings that can be implemented with simple and inexpensive demodulation schemes. Temperature, strain, and refractive-index resolutions of 0.65 degrees C, 65.75 micro, and 7.69 x 10(-5), respectively, are demonstrated for gratings fabricated in standard telecommunication ...
V, Bhatia, A M, Vengsarkar
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Long-period fiber grating by electrical discharge
24th European Conference on Optical Communication. ECOC '98 (IEEE Cat. No.98TH8398), 2002Long-period gratings were manufactured by applying step by step an electric discharge through a standard telecommunication fibre. The induced perturbation was so large that less than 20 steps are necessary to obtain a coupling length.
N. Godbout +3 more
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Long Period Fiber Gratings Inscribed by Periodically Tapering a Fiber
IEEE Photonics Technology Letters, 2014A promising technique for inscribing long period fiber gratings (LPFGs) was demonstrated by only using a commercial splicer. The commercial splicer was developed secondarily to build up a new program for periodically tapering a single mode fiber. High-quality LPFGs with a low insertion loss of ~1 dB and a large resonant attenuation of more than -30 dB ...
Guolu Yin +7 more
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