Design of dispersion-engineered As2Se3 channel waveguide for mid-infrared region supercontinuum generation

Abstract

In recent years, low cost and scalable integrated optics compatible planar waveguides have emerged for an ultrabroadband supercontinuum generation between ultraviolet and mid-infrared region applications. A 20mm-long integrated photonics compatible highly nonlinear As 2 Se 3 channel waveguide, which exhibited wider as well as lower magnitude and nearly flat anomalous dispersion region, designed and modeled by employing GeAsSe glass for its upper and lower claddings. Using pump source at 6 µm with a pulse duration of 170-fs, an ultrabroadband long wavelength region supercontinuum broadening covering the wavelength from 3.5 µm to up to 15 µm could be predicted with the largest input peak power of 10 kW. Further increasing power up to 20 kW does not enhance the supercontinuum expansion noticeably beyond 15 µm. This could be the longest supercontinuum generation by an on-chip integrated photonics compatible planar waveguide which can be used for a variety of mid-infrared region applications.

Dispersion-engineered T-type germanium waveguide for mid-infrared supercontinuum and frequency comb generations in all-normal dispersion region

“…From the previous works [20][21][22][23][24][25], the dispersion has a crucial influence on the SC generation. When the pump pulse propagates in the anomalous dispersion region of the waveguide, the soliton dynamics dominate the nonlinear process of the SC generation [20][21][22].…”

Characterization of Au/As2Se3 Multifunctional Tunneling Devices

“…The lowest detectable methane concentration was 7.4 × 10 −8 using an As 2 Se 3 microfiber length of 1 cm. As 2 Se 3 is also used for the detection of active midwave–longwave supercontinuum Fourier transform infrared (FTIR) signals …”

Design and analysis of suspended core channel waveguide made using As2Se3 glass system for mid-infrared supercontinuum generation

“…To reduce the propagation loss, the short length, scalable, and lowcost integrated photonic device fabrication is preferred by the researchers nowadays. To address this issue in designing the SCG sources, the planar waveguide is a promising candidate in line with microstructured based fiber design [17,18,19,20]. The prime concern during planar waveguide design is the absorption loss of a bottom layer of the waveguide core in the deep MIR.…”

“…In the last decade, the design of broadband SCG sources using the optical planar structure and microstructured based optical fiber have been investigated both the theoretically and experimentally by the several research groups [17,20,22,23,24,25,26,27,28,29,30,31,32,33,34,35]. Table 1 presents a brief summary of MIR SCG coverages obtained by using different types of fibers and waveguides in the chalcogenide materials, respectively, by applying input power in the MW range.…”