Fiber grating filter for WDM systems: an improved design
Abstract—We report on a novel technique for the design of fiber gratings whose reflection characteristic closely approximates the ideal rectangular linear phase filter.
Abstract—We report on a novel technique for the design of fiber gratings whose reflection characteristic closely approximates the ideal rectangular linear phase filter.
By monitoring the shift of resonant spectrum dips and using two-parameter measurement matrix method, the sensor''s cross-sensitivity between temperature and humidity is eliminated.
They are also used in optical fiber communications for wavelength division multiplexing. A special type, chirped volume Bragg gratings, is widely used for
Abstract A Two-photon 3D printing Fabry-Perot (FP) sensor for simultaneous measurement of temperature and non-contact pressure is proposed and verified by experiments. A
2. Long period gratings: a view back Long Period Gratings are a periodic perturbation of the properties of the optical fiber, generally of the refractive index of the core and/or geometry, in a single mode fiber.
In this paper, we demonstrate a highly reflective long period fiber grating (RLPG) sensor. The sensor was fabricated by depositing silver atom on both surfaces of the flat end-face and the tail
Secondly, the intensities of the reflections from M1 and M3 are approximately equal to produce Vernier spectrum with good contrast. Thirdly, L 1 and L 2 are on the order of several
Refractive index engineering in holographic polymer nanocomposites: (a) Schematic diagram of forming (left) transmission gratings and (right) reflection gratings by interference of the two coherent laser
In this paper, we investigate modification of transmission spectra of long-period fiber grating structures with an acoustic shock front propagating along the fiber.
Fiber Bragg grating technology is popularly used in measurements of various physical parameters, such as pressure, temperature, and strain for civil
With the development of fiber optical technologies, fiber Bragg grating (FBG) sensors are frequently utilized in structural health monitoring due to their
In this paper, we describe the spectral characteristics that can be achieved in fiber reflection (Bragg) and transmission gratings. Both principles for understanding and tools for designing fiber gratings are
The Long Period Fiber Grating (LPFG) from AtGrating is an advanced optical component designed to enable selective attenuation of specific wavelengths in the transmission spectrum.
In this paper, we rigorously deduce the coupled-mode equations of a long-period fiber grating and fiber Bragg grating in their cascaded structure
Experimental investigation of the cladding modes excited by long-period gratings, as well as sensitivity of the long-period grating spectrum to
Optical fiber sensors (OFSs) have emerged as essential tools in the monitoring of physical, chemical, and bio-medical parameters in harsh situations
In this paper, we investigate modification of transmission spectra of long-period fiber grating structures with an acoustic shock front propagating along
We investigate the changes in the transmission spectrum of long period fibre gratings and tilted short-period fibre Bragg gratings versus the refractive index of the surrounding...
We simulate transmission through homogeneous long-period fiber gratings, -shift, and reflective gratings with propagating acoustic shock front producing non-uniform deformation along the optical fiber.
2. Fabrication methods of long-period fibre gratings The inscription of long-period gratings on optical fibre basically consists in the generation of a periodical perturbation of the refractive index in the
Abstract and Figures The spectral response of long-period fiber gratings can be tailored by the cladding index perturbation (C-LPFGs) induced by
Abstract and Figures A method for inscribing fiber bragg gratings (FBG) using direct, point-by-point writing by an infrared femtosecond laser was
A miniature and all-optical fiber sensor based on integration of Fabry–Perot interferometer (FPI) and fiber Bragg grating (FBG) is proposed and experimentally demonstrated for simultaneous
Fiber Bragg gratings are reflective structures in the core of an optical fiber with a periodic or aperiodic perturbation of the effective refractive index.
Abstract A continuous liquid level sensor (LLS) based on an in-fiber Michelson interferometer is proposed and experimentally demonstrated. The in-fiber Michelson interferometer is
In this chapter we will make a review of the relevant aspects of LPFGs.
In this paper, we computationally investigate the effects of metal coating length and coating coverage on the reflected spectrum of a long period grating (LPG) over a broad bandwidth.
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