Laser diode beam divergence is the main parameter for beam shaping and fiber optic coupling. Increasing the waveguide layer thickness is the conventional method to decrease the beam divergence. In this paper, the broadened asymmetric waveguide is introduced to decrease the divergence without increasing the optical power. The asymmetric waveguide was used to shift the vertical optical field to n...

We analyze the orbital magnetic susceptibility from band structure of twisted bilayer graphene. Close to charge neutrality, out-of-plane inherits strong diamagnetic response Increasing doping, a crossover diamagnetism paramagnetism is obtained and logarithmic divergence develops at van Hove singularity Moir\'e lattice in first band. The enhanced stronger for relatively large angle but gets supp...

Radiometric correction (RC) of the airborne Light Detection And Ranging (LiDAR) intensity data has been studied in the last few years. The physical model of the RC relies on the use of the laser range equation to convert the intensity values into the spectral reflectance of the reflected objects. A number of recent studies investigated the effects of the LiDAR system parameters (i.e. range, inc...

OBJECTIVE The purpose of this study was to determine the condylar volume in subjects with different mandibular divergence and skeletal class using cone-beam computed tomography (CBCT) and analysis software. MATERIALS AND METHODS For 94 patients (46 females and 48 males; mean age 24.3 ± 6.5 years), resultant rendering reconstructions of the left and right temporal mandibular joints (TMJs) were...

We report the theory and experimental verification of a method to reduce beam divergence from coherently-coupled ring arrays photonic crystal vertical cavity surface emitting lasers (VCSELs). The etched into top distributed Bragg reflector defines optically coupled array elements, each which has independent current injection thus gain. Using 2-dimensional complex waveguide model we simulate sup...

In this Letter, we present the photonic nanojet as a phenomenon in structured light generator system that is implemented to modify source focal spot size and emission angle. The optical comprises microlens array illuminated by focused Gaussian beam generate pattern far field. By introducing spheroid with different aspect ratios focus of beam, characteristics change, generated, which will engine...

Tractor-trailer vehicles are affected by jackknifing, a phenomenon that consists in the divergence of trailer hitch angle and ultimately causes vehicle to fold up. For case backward motions, which jackknifing can occur at any speed, we present control method drives along generic reference Cartesian trajectories while avoiding angle. This is obtained thanks feedback law combines two actions: tra...

INTRODUCTION  Several techniques can be performed to improve nasal tip definition such as cartilage resection, tip grafts, or sutures. Objctive: To evaluate the outcome of lateral intercrural suture at the lower lateral cartilage by endonasal rhinoplasty with a basic technique without delivery in decreasing the angle of domal divergence and improving the nasal tip definition. METHOD  This pro...