A methane Raman cell optimized for generating high energy laser pulses at 1.54 microns wavelength is characterized. 1st Stokes conversion efficiencies up to 43% – equivalent to 62% photon conversion efficiency – were measured. Experimental results show output average power in excess of 17.5 W, pulse energies of 350 mJ at 50Hz, with good beam quality (M < 6.) Narrow bandwidth output is produced ...

We demonstrate the first low-noise mid-IR frequency comb source using a silicon microresonator. Our observation of strong Raman scattering lines in the generated comb suggests that interplay between Raman and four-wave mixing plays a role in the generated low-noise state. In addition, we characterize, the intracavity comb generation dynamics using an integrated PIN diode, which takes advantage ...

Background: The present work aims to study the out-of-field photon calculation accuracy of a commercial treatment planning system (TPS), Oncentra, for three-dimensional conformal radiotherapy (3D-CRT) and intensity modulated radiation therapy (IMRT) treatment techniques from Elekta Synergy medical linear accelerator. Materials and Methods: Accuracy of individual out-of-field dose components was...

A new Pinnacle 3D treatment-planning system software release has recently become available (v7.4, Philips Radiation Oncology Systems, Milpitas, CA), which supports modeling of rounded multileaf collimator (MLC) leaf ends; it also includes a number of other software enhancements intended to improve the overall dose calculation accuracy. In this report, we provide a general discussion of the dose...

A nonlinear LCR parallel circuit model of a single photon avalanche diode (SPAD) is derived from Lienard-type differential equation. The resistance and the inductance associated with multiplication (AM) are time-dependent governed by time constant due to impact ionization ratio. Time dependences current, voltage, resistance, in analyzed numerically solving During initial generation Geiger-mode ...