Second harmonic generation in a hollow-core fiber filled with GaSe nanosheets

Research progress of nonlinear optical properties of integrated two-dimensional materials

“…图 6 (a) 基于转移方法制备的单层WS 2 -光纤纳米线混合结构实现SHG的增强 [81] . (b)-(e) 基于溶液法制备的二维材料-光纤 集成结构实现二阶非线性过程增强的研究进展 (b) 少层GaSe辅助光学微光纤实现高效的二阶非线性过程 [82] ; (c) 连续波泵浦 的InSe集成的微光纤中频率上转换 [84] ; (d) 填充有GaSe纳米片的HCF结构示意图 [85] ; (e) GaSe纳米片集成的SCF实现SHG过 程 [86] Fig. 6.…”

“…(a) Enhanced SHG in hybrid WS 2 -optical-fiber-nanowire structureprepared by transfer method [81] . (b)-(e) Research progress on enhancement of second-order nonlinear process of 2D material-optical fiber integrated structures prepared by solution methods: (b) High-efficiency second-order nonlinear processes in an optical microfibre assisted by few-layer GaSe [82] ; (c) continuous-wave pumped frequency upconversions in an InSe-integrated microfiber [84] ; (d) schematic of a HCF filled with GaSe nanosheets [85] ; (e) SCF with embedded GaSe nanosheets for SHG [86] .…”

Estimation of the nonlinear-optical coefficient of GaSe:S crystals according to electro-optical measurements

“…[10][11][12] GaSe has recently been taken into consideration as a material for the optical range used in telecommunications, specifically the 1.5 -1.6 microns spectral region. [13][14][15][16][17] However, there are limitations to the use of GaSe related to its features. Firstly, due to the high refraction, the internal angle of phase matching exceeds a critical value, for example, while generating harmonics of radiation in the telecommunication range in samples with a cut orthogonal to the crystal's z axis.…”

“…Second, extensive layering and splitting of the crystal orthogonally to the same axis impede the preparation of a non-orthogonal cut in addition to the material's nearly nonexistent hardness. Matching optical elements 18,19 or the use of nanoclops of material in the area of increased concentration of the optical field can act as a solution: the core of the fiber 14,16 or the surface of the metamaterial. 15 A different approach that enhances the crystal's optical and mechanical qualities involves doping it with isovalent elements [20][21][22] particularly S. [23][24][25] This in turn makes it possible to prepare the necessary optical cuts of the crystal by fixing the crystal sample in an epoxy compound with subsequent processing.…”

Optical & electrochemical fiber-optic sensor: in situ detection of antibiotics with fM detection limit

“…Optical fibers exhibit numerous distinctive properties, such as compact size, lightweight, integrability, remote sensing, and high sensitivity. [17][18][19][20] Optical fiber sensors have found extensive applications in biochemical processes. [21][22][23] For example, Lamarca et al introduced a label-free ultrasensitive U-shaped fiber immunosensor for CIP detection in wastewater.…”