Exact(15)
In addition, results from numerical simulation show that the ultra-flattened dispersion of 0 ± 0.65 ps/(nm.km) can be obtained in a 1.36 1.62 μm wavelength range with confinement losses lower than 10−7 dB/m in the same wavelength range.
Results show that the ultra-flattened dispersion of 0.931 ps/(nm km) (DF-PCF1) and 1.533 ps/(nm km) (DF-PCF2) can be achieved in the wavelength range from 1.3 to 1.6 μm with confinement losses lower than 0.001 dB/km in the same wavelength range.
Numerical results show that the designed OPCF has the ultra-flattened dispersion of 0 ± 0.4 ps/(nm km) from 1.34 μm to 1.72 μm (380 nm band) which covers S, C and L communication bands, a low confinement loss of less than 10−7 dB/m in the same wavelength range, and the corresponding birefringence and nonlinear coefficient are about 2.12 × 10−2 and 50.67 W−1 km−1 at 1.55 μm, respectively.
Accumulating degradation products are also absorbed in the same wavelength range, but they are more photo stable.
On the other hand, the measured average reflectance of bare Si wafers in the same wavelength range is 35%.
However, the R a value of the acid textured parts of the hemispherical surface in the same wavelength range was found to be ~20%[17]7].
Similar(45)
The PASiNP structure remarkably reduces the reflection of Si surface and demonstrates a low average reflection loss of ~2.84% (solid line in Fig. 3) within the same wavelength range, which is far lower than that of pristine Si wafer and previously developed Si micro-/nanostructures, as well as other ARCs [7, 8, 20, 24 27].
For quality assurance and comparison, AgNO3 solution in deionized water showed no absorption peak at the same wavelength range (data not shown).
In contrast, the a-Si cone array has below 10% reflectance within the same wavelength range, with the minimum reflectance less than 1% at 500-nm wavelength, corresponding to peak of solar irradiance spectrum.
The PF also changes over the same wavelength range, with γ showing that the likelihood of backscatter events increases vs. wavelength.
In this letter, we report a novel uniform grating coupler, which can couple the light of different polarization from fiber into a single waveguide at same wavelength range.
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