Wave Optics To explain some phenomena, such as interference and diffraction of light, it is necessary to go beyond geometrical optics. Huygens' principle Huygens considered light to be a wave. He envisioned a wave crest advancing by imagining each point along the wave crest to be source point ...
Versions Notes Abstract To improve the power of reference wavefront generated by reference wavefront source (RWS) based on silicon nitride (SiN) waveguide in point diffraction interferometer (PDI), we design the Y-branch coupler and grating coupler, and then compare the maximum coupling efficiency,...
Versions Notes Abstract A cylindrical waveguide structure with the running refractive index wave has been recently demonstrated as a means for the generation of high-repetition-rate pulse trains. The operation mechanism involves a proper combination of the frequency modulation and modulation instability ...
Berti E, Barausse E, Cardoso V, Gualtieri L, Pani P, Sperhake U, Stein LC, Wex N, Yagi K, Baker T et al (2015) Testing general relativity with present and future astrophysical observations. Class Quant Grav 32(24):243001.https://doi.org/10.1088/0264-9381/32/24/243001 ArticleADSGoogl...
Shack-Hartmann wavefront sensor plays a key role in adaptive optics (AO) systems, which detect the aberrant wavefront by an array of micro-lenslets across the aperture pupil. However, some sub-apertures would be a lack of light induced by the imperfectness of micro-lenslets or pupil shift...
Versions Notes Abstract The Compact Midwave Imaging System (CMIS) is a wide field of view, multi-angle, multi-spectral pushframe imager that relies on the forward motion of the satellite to create a two-dimensional (2D) image swath. An airborne demonstration of CMIS was successfully completed ...
Versions Notes Abstract This work presents a novel integrable silicon photodetector which can only be conceived as part of a monolithic electrophotonic basic structure formed of a silicon light emitter, waveguide and light detector. That is, it cannot operate as a single electronic or photonic device...
Versions Notes Abstract This work proposes a new wave-period estimation (L-dB) method based on the power-spectral-density (PSD) estimation of pitch and roll motional time series of a Doppler wind lidar buoy under the assumption of small angles (±22 deg) and slow yaw drifts (1 min), and...
Additionally, the Shack–Hartmann wavefront sensor, when integrated with adaptive optics technology, enhances image information for biological samples in optical microscopes [13]. In the context of compensating for ocular aberrations, Shack–Hartmann wavefront sensors play a crucial role. They assist in...
On the basis of Fourier optics theory, wavefront coding technology combines the ambiguity function, from the radar field to optical transfer functions, and the method of stationary phase, normally used to estimate oscillatory integrals. The generalized pupil function takes the form 𝑃(𝑥,𝑦,...