The EDFL is structured by insertion of three different short passive subring cavities, which serve as mode filters, into the main cavity, and it is combined with a fiber Bragg grating (FBG), the MRCs resonator can make SLM lasing.
The simulation result shows the least narrow bandwidth of Bragg grating under the defined parameters is 0.02 nm when its reflectivity is 1,which is much narrower than the fiber Bragg grating used in typical distributed sensor system.
Elastomeric replicas of surface relief structures were prepared by molding poly(dimethylsiloxane) (PDMS) precursors against photo-inscribed surface-relief-gratings on azo polymer films.
As for the yttrium vanadate (YVO4) crystal polarized-light interferometer, if there are two different fiber Bragg gratings that have a π rad phase difference, one is used for strain sensor and the other is used for temperature compensating.
The higher order distributions were quantitatively determined for three gratings with line densities of 1800, 600 and 200 l/mm.
The moiré signals generated by two pairs of quadruple gratings on mold and wafer are optically projected onto two photo-detector arrays, then the detected moiré signals are used to estimate the alignment errors in the x and y directions.
Photoinduced dichroism and surface-relief-gratings of hyperbranched azo polymers synthesized by azo-coupling reaction
The Turning Error Effect of Reflectors in the Talbot Interferometer used for Writing Fiber Bragg Grating
The Talbot interferometer used for writing fiber Bragg grating (FBG) is analyzed effectively in this paper.
As the strain sensing element of a structural health monitoring, the study and the application of the fibre-optic bragg grating (FBG) have been widely accepted.
And we simulated the transmission model constructed with Erbium-doped fiber amplifier (EDFA) as the solo amplifier and the chirped fiber Bragg grating (CFBG) as the solo dispersion compensator used in the system.
Resolving the problem of cross sensitivity in fiber Bragg grating sensor based on the principle of polarized-light interference