广义Maxwell粘弹性流体在矩形管内的不定常剪切流动，齐海涛，徐明瑜，In this paper, the unsteady flow of a viscoelastic fluid with the fractional derivative Maxwell model in rectangular tube is studied. The exact solutions are then obtained for the
A tunable dual-band infrared polarization filter is proposed and investigated. Based on the perfect absorption characteristic of the metal-dielectric-metal sandwich structure, the reflection spectrum performs as a filter. The filter consists of three
We produce a maximum 1.45 W laser output at 1064 nm using a neodymium-doped silicate glass fiber that has a rectangular core with dimensions of ～6.3 μm×31.5 μm. The measured divergence angles of the output laser in two dimensions are 3.22° and 1.76°,
An empirical formula for calculating the electric field distribution in rectangular slots on leaky coaxial cable (LCX) is derived. With the assistance of the formula, the complicated electromagnetic simulation can be avoided, and people who have litt
Watt-level short fiber lasers side-pumped through fiber-to-waveguide couplers are demonstrated. The fiber lasers are fabricated from Nd-doped phosphate glass with large numerical aperture of 0.2 and rectangular cross section of 1.5\times0.5 (mm). Sin
Hybrid square/rhombus-rectangular lasers (HSRRLs) consisting of a Fabry–Perot (FP) cavity and a square/rhombus microcavity (SRM) are proposed and demonstrated for realizing single-mode lasing with a wide wavelength tuning range. The SRM is a deformed
