Highly nonlinear photonic crystal fiber with ultrahigh birefringence using a nano-scale slot core

Anomalous birefringence and nonlinearity enhancement of As2S3 and As2S5 filled D-shape fiber for optical communication

“…After that, the same author has been modified the nonlinearity and dispersion up to 5828 W −1 km −1 and -1546.6 ps/(nm-km), respectively just replacing the core material with a soft glass [21]. In the year 2015, nanoscale slot core-based PCF was designed by Liao et al [22] which shows the high nonlinearity of 3.5739×10 4 W −1 km −1 . In addition, Yang et al [23] were designed a PCF that provided better optical characteristics like maximum nonlinearity of 68 W −1 km −1 , confinement loss of 10 −4 dB/m, and birefringence of 2.22×10 −2 .…”

Design of nonlinear photonic crystal fibers with ultra‐flattened zero dispersion for supercontinuum generation

“…The effective mode area is inversely proportional to the filling factor of PCFs. Liao and others reported an ultra‐high nonlinear coefficient corresponding to 3.573 × 10 4 W −1 km −1 at 1.55 μm . Hossain and others introduced an elliptical air hole at the core and decreased the sizes of inner air holes to obtain a nonlinear coefficient corresponding to 83 W −1 km −1 .…”

Design and Electromagnetic Analysis of Microstructured Holey Optical Fibres with Stepwise Random-Air-Hole Distributions in Concentric Cladding Layers

“…If in an optical fibre uniform and identical air holes with some type of periodic arrangement run along the direction of wave propagation, such fibre is referred to as a PCF. On the other hand, some investigators have suggested that the air hole arrangement, while maintaining a regular pattern, may not be periodic or may even be completely random in shape, size, and location and yet provide light guidance [6][7][8][9][10]. An important feature of the PCF or random holey fibre is that it can be made of only a single material, in contrast to all other types of fibres, which are manufactured with two or more materials.…”

“…Because of its unique structure, which is different from those of the conventional step-index or graded-index fibres, the PCF or MHOF can provide propagation properties not easily attainable from conventional fibres [11][12][13][14]. For example, the MHOF can be designed to be single-mode over the entire wavelength range of interest in optical communications, provide small and nearly constant dispersion over a wide wavelength range, or be a highly nonlinear optical fibre [9,11]. This novel fibre offers the potential for a variety of applications such as high-power lightguide with low loss, supercontinuum generation, grating-incorporated tunable filter, pressure sensor, and polarization maintaining fibre [15][16][17][18].…”