Results 301 to 310 of about 67,680 (348)
Some of the next articles are maybe not open access.
SPIE Proceedings, 1990
The fabrication and characteristics of a variety of single-mode fibre Bragg reflection gratings are discussed. By simple modifications to the fabrication process fibre gratings can be made with very different characteristics ranging from very narrowband resonators with a 0.04nm bandwidth to broadband reflectors with a 17nm bandwidth.
C. M. Ragdale, D. C. Reid, I. Bennion
openaire +1 more source
The fabrication and characteristics of a variety of single-mode fibre Bragg reflection gratings are discussed. By simple modifications to the fabrication process fibre gratings can be made with very different characteristics ranging from very narrowband resonators with a 0.04nm bandwidth to broadband reflectors with a 17nm bandwidth.
C. M. Ragdale, D. C. Reid, I. Bennion
openaire +1 more source
2006 Digest of the LEOS Summer Topical Meetings, 2006
Examples of adiabatic modification of optical fiber parameters while maintaining single-mode propagation are discussed in the paper. It is found that adiabatic variation of polarization of fiber mode enables efficient coupling of a PM fiber supporting linearly polarized modes and a chiral fiber supporting circularly or elliptically polarized modes.
V.I. Kopp +6 more
openaire +1 more source
Examples of adiabatic modification of optical fiber parameters while maintaining single-mode propagation are discussed in the paper. It is found that adiabatic variation of polarization of fiber mode enables efficient coupling of a PM fiber supporting linearly polarized modes and a chiral fiber supporting circularly or elliptically polarized modes.
V.I. Kopp +6 more
openaire +1 more source
Random fiber Bragg grating Raman fiber laser
Optics Letters, 2014We demonstrate for the first time to our knowledge a Raman random fiber laser (RRFL) based on a long random fiber Bragg grating (RFBG-RRFL). Unlike other recently demonstrated random fiber lasers that rely on incoherent Rayleigh scattering feedback, the present scheme uses randomly distributed phase shifts inside a fiber-meter long Bragg grating as a ...
Mathieu, Gagné, Raman, Kashyap
openaire +3 more sources
Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals, 1997
Long period fiber gratings that couple light from guided core modes to non-guided cladding modes provide a means of introducing wavelength dependent losses in optical fiber systems.1 As a result, these in-fiber devices have found use as gain-equalizers in broadband optical fiber amplifiers,2 as band-rejection filters in high-power cascaded Raman fiber ...
openaire +1 more source
Long period fiber gratings that couple light from guided core modes to non-guided cladding modes provide a means of introducing wavelength dependent losses in optical fiber systems.1 As a result, these in-fiber devices have found use as gain-equalizers in broadband optical fiber amplifiers,2 as band-rejection filters in high-power cascaded Raman fiber ...
openaire +1 more source
Magnetically Tunable Fiber Bragg Gratings
Wavelength Division Multiplexing Components, 1999We believe we report the first demonstration of a broad-range (15.7 nm) tuning of fiber Bragg grating using fast, programmable, and latchable magnetic actuation. A key advantage is that the device requires no power except when shifting wavelengths.
S. Jin +4 more
openaire +1 more source
Array of grating–fiber couplers
Optics Letters, 1990Along a single-mode fiber a number M of grating-fiber couplers are fabricated at equal spacings L(0). The fiber is coiled so that the couplers lie side by side, forming a planar optical antenna array. With varying optical frequency the resulting radiation lobes sweep slowly along the meridional direction but fast along the orthogonal azimuthal ...
M, Zürn, R, Ulrich
openaire +2 more sources
Structured Chirped Fiber Bragg Gratings
Journal of Lightwave Technology, 2008In this paper, a theoretical and numerical analysis of novel in-fiber photonic devices based on a structured chirped fiber Bragg gratings (CFBGs) for sensing and communication applications is presented. The investigated structure consists in a CFBG with single or multiple defects obtained by a deep and localized stripping of the cladding layer along ...
Pisco, M +4 more
openaire +1 more source
Alterable grating fiber-optic switch
Applied Optics, 1981This paper describes a solid state high speed fiber-optic switch based on dynamically alterable magnetic stripe domains that occur naturally in epitaxial films of rare-earth iron garnet. The array of stripe domains acts collectively as a Faraday effect phase diffraction grating that deflects visible and infrared radiation. Electrically derived magnetic
G F, Sauter +2 more
openaire +2 more sources
Polymer micro-fiber Bragg grating
Optics Letters, 2013Polymer micro-fibers with inscribed Bragg gratings are reported in this Letter. Starting with a single-mode polymer optical fiber and implementing a two-stage tapering process, a 16 μm diameter micro-fiber is fabricated and a Bragg grating is inscribed in it that exhibits a peak reflected wavelength circa 1530 nm.
Ginu, Rajan +5 more
openaire +3 more sources
2012
Fiber optics has emerged as a promising sensing technology over the past two decades. Fiber optic sensors (FOS) have generated great interest due to their small size, immunity to electro-magnetic interference and radio frequency (RF) interference, inherent safety, and accuracy.
R. Suresh, S. C. Tjin, J. Hao
openaire +1 more source
Fiber optics has emerged as a promising sensing technology over the past two decades. Fiber optic sensors (FOS) have generated great interest due to their small size, immunity to electro-magnetic interference and radio frequency (RF) interference, inherent safety, and accuracy.
R. Suresh, S. C. Tjin, J. Hao
openaire +1 more source