Fiber Bragg grating sequential UV-writing method with real-time interferometric side-diffraction position monitoring

Abstract

This work presents a new sequential UV-writing procedure for fabricating long fiber Bragg grating (FBG) devices. To real-time accurately align the position of every exposed FBG section prior to UV exposure, a single-period reference fiber grating with strong refractive index modulation is probed by applying an interferometric side-diffraction method to measure the grating phase as the position reference. In this way the overlapped FBG sections can be connected section-by-section without obvious phase errors, even when the written index-modulation is weak.

Design and performance evaluation of a dispersion compensation unit using several chirping functions in a tanh apodized FBG and comparison with dispersion compensation fiber

“…The parameters used to design the ACFBG used as the first technique for dispersion compensation as described in Section 2 are tabulated in Table 2 [30,33,39]. The grating length is selected from the mentioned range to provide optimum dispersion compensation performance according to the technique used, as will be shown later.…”

Fiber Bragg Grating-Based Optical Amplifiers

“…3), and the overlapped FBG sections can be connected section-by-section without obvious phase errors. (Hsu et al, 2005). FBGs are critical components in fiber-optic communication and fiber sensor applications.…”

“…The use of narrowband FBGs for add/drop multiplexers can also help extracting a single wavelength from the fiber without disturbing other wavelengths thus can achieve high optical data rates. A demultiplexer can be achieved by cascading multiple drop sections of the OADM, where each drop element uses a FBG set to the wavelength to be (Hsu et al, 2005) demultiplexed. Conversely, a multiplexer can be achieved by cascading multiple add sections of the OADM.…”

Simultaneous two-dimensional nanometric-scale position monitoring by probing a two-dimensional photonic crystal plate

“…Figure 3(c) shows the typically resulted periodic pattern along the x-axis captured by the CCD camera (grey solid line), the pattern after the filtering+taking-real-part procedure (grey dotted line) and the obtained phase distribution by taking the arg of the filtered data (bold solid line). [9] To test the nanometric-scale movement detection algorithm, the system is implemented with the LabVIEW software for automatically controlling the whole position monitoring process. The one dimensional position reading is executed firstly.…”