Interrogation of a long-period grating using a mechanically scannable arrayed waveguide grating and a sampled chirped fiber Bragg grating.

[Proceeding] Improved Fibre Bragg Grating Interrogation for Dynamic Strain Measurement

High-speed fibre Bragg grating sensor interrogation using dispersion- compensation fibre

Introduction: Fibre Bragg gratings (FBGs) have proved themselves as the ideal candidates for measuring strain and temperature in smart structures, civil engineering or other harsh environments. The advantages of the FBG sensor over conventional electrical sensors include small size, light weight, immunity to electromagnetic interference, low cost and other inherent advantages of fibre-optic sen...

Unique Solution of Short Pulse Propagation in Nonlinear Fiber Bragg Grating

In this study, a new numerical method is introduced to obtain the exact shape of output pulse in the chalcogenide fiber Bragg grating (FBG). A Gaussian pulse shape with 173 ps width is used as an input pulse for lunching to a 6.6 mm nonlinear FBG. Because of bistable and hysteresis nature of nonlinear FBG the time sequence of each portion of pulse is affected the shape of output pulse. So we di...

Interrogation of Fibre Bragg Grating Sensors Using an Arrayed Waveguide Grating

We experimentally investigate the use of an arrayed waveguide grating (AWG) to interrogate fibre Bragg grating (FBG) sensors. A broadband light source is used to illuminate the FBG sensors. Reflected spectral information is directed to the AWG containing integral photodetectors providing 40 electrical outputs. Three methods are described to interrogate FBG sensors. The first technique makes use...

Optical pulse compression based on nonlinear silicon waveguides and chirped Bragg gratings

Due to the growing demand for higher bandwidth, employing optical devices instead of electronic devices in data transmission systems has attracted much attention in recent years. Optical switches, modulators and wavelength converters are a few examples of the required optical devices. CMOS compatible fabrication of these devices, leads to much more growing of this technology. Optical pulse comp...