Long period grating has a wide variety of applications, including band-rejection filters, gain flattening filter and sensors. Various gratings with complex structures have been designed: …

2024年2月29日 · Long-period fiber gratings (LPFGs) functioning as band-reject filters have played a pivotal role in the realm of optical communication. Since their initial documentation in 1996, …

In essence, a long period fibre grating (LPFG) is an all-fibre device with wavelength dependent loss. As a band rejection filter, all light in a spectral slice is discarded without affecting the …

2024年10月1日 · The birthdate of long period fiber gratings (LPFG) can be placed in the early 1990s, when Bilodeau et al. [1] proposed an efficient method for fabricating fiber mode …

Abstract: We present a new class of long-period fiber gratings that can be used as in-fiber, low-loss, band-rejection filters. Photoinduced periodic structures written in the core of standard …

A long-period fiber grating (LPG) is a one dimension (1D) periodic structure, and is formed by introducing periodic modulation of the refractive index along an optical Þber. Since its period is …

2010年10月22日 · The focused high-frequency CO 2 laser pulses scanned periodically across the employed fiber along “X” direction and then shifted a grating pitch along “Y” direction, i.e., the …

2021年5月30日 · In this paper, comprehensive remarks are given that focus on the main fabrications and wide applications of helical long-period fiber gratings (HLPGs). Firstly, the …

Long-period fiber gratings (LPFGs) have received much attention since their appearance [1]. LPFGs have many well-known advantages over electronic based sensors, such as compact …

2023年1月3日 · In this review, we focused attention on LPFG-based sensors for chemical and biomedical applications from the perspective of design and functionalization. Firstly, the …