Results 231 to 240 of about 8,929 (253)

Development of long-period fiber grating coupling devices

Applied Optics, 2008
A long-period fiber grating (LPFG) formed in a single-mode fiber is considered as an effective device to tap light from the core of fiber. This light-tapping property of the LPFG allows a new class of wavelength-selective optical couplers to be realized by using the configuration of parallel LPFGs. Over the years a number of four-port and six-port LPFG
openaire   +2 more sources

Sensitivity characteristics in nanosized coated long period gratings

Applied Physics Letters, 2006
This work presents an experimental analysis of the sensitivity characteristics to the surrounding refractive index (SRI) in long period gratings coated with polymeric overlay with high refractive index and thickness values ranging in hundreds of nanometers.
Cusano A, Pilla P, IADICICCO, Agostino, CAMPOPIANO, Stefania, Giordano M, Cutolo A.   +5 more
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Long-period waveguide grating filter with two composite gratings

Proceedings of SPIE, 2006
We demonstrate LPWG in sol-gel material with replica molding and stamping technique. The grating structures were fabricated on top and bottom of the same ridge waveguide and operate at both communication wavelengths 1550 and 1310 nm respectively.
Gyong-Jin Oh, Abderrafia Moujoud, Woo-Soo Kim, Byeong-Soo Bae, Sang-Yung Shin   +4 more
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High resolution long-period grating temperature sensor

Proceedings of the 2008 International Conference on Advanced Infocomm Technology - ICAIT '08, 2008
A simple etched and packaged LPG temperature sensor for biomedical application has been developed and resolution of about 0.005°C is achieved, in comparison with conventional thermometer, which only exhibits 0.01°C. The temperature coefficient of the specially packaged LPG sensor is measured to be 3.776nm/°C, which is 15 times higher than that of the ...
L. H. Chen, Chi Chiu Chan, J. Sun
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Progress in long period fiber gratings

Conference Proceedings. LEOS'98. 11th Annual Meeting. IEEE Lasers and Electro-Optics Society 1998 Annual Meeting (Cat. No.98CH36243), 2002
Summary form only given. Long period fiber gratings have been used in a variety of applications such as gain equalization filters for optical amplifiers, band rejection filters and sensors for temperature and strain. Among these applications, gain equalization is the most demanding and interesting because of the impact of broadband gain-flattened EDFA ...
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Magnetic-force-induced long-period fiber gratings

Optics Letters, 2012
A novel formation method of a long-period fiber grating (LPFG) based on a magnetic-force-induced microbend is proposed and experimentally demonstrated. The LPFG employs a permanent magnet that exerts transversal force to the fiber by attracting a steel coil spring.
Hajime, Sakata, Kosuke, Yamahata
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Long-period fiber gratings as ultrafast optical differentiators

Optics Letters, 2005
It is demonstrated that a single, uniform long-period fiber grating (LPFG) working in the linear regime inherently behaves as an ultrafast optical temporal differentiator. Specifically, we show that the output temporal waveform in the core mode of a LPFG providing full energy coupling into the cladding mode is proportional to the first derivative of ...
Mykola, Kulishov, José, Azaña
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Photonic crystal fiber long-period gratings for biochemical sensing

Optics Express, 2006
Jesper B Jensen, Martin Dufva, Lars H Pedersen   +2 more
exaly  

Dispersion control with use of long-period fiber gratings

Journal of the Optical Society of America A: Optics and Image Science, and Vision, 2000
T Erdogan
exaly  

Random period arc-induced long-period fiber gratings

Optics and Laser Technology, 2012
A Martinez-Rios, I Torres-Gómez, D Monzón-Hernández   +2 more
exaly