Dual color, frequency, pulse duration and shape agile laser system for particle spectroscopy and manipulation

Abstract

A dual color, frequency and pulse duration agile laser system, capable of delivering laser pulses in arbitrary temporal profiles with ∼1 ns to ∼1 µs pulse duration, chirping rates of ∼27 MHz/ns with an achievable chirping range of several GHz across the pulse duration, and with energies ranging from a few nJ to hundreds of mJ per pulse has been developed. The flexibility and capability of this laser system provide a wide range of laser parameters that can be exploited to optimize operational conditions in various experiments ranging from laser diagnostics to spectroscopy and optical manipulation of matter. The developed system is successfully demonstrated to obtain coherent Rayleigh-Brillouin scattering (CRBS) in both single and dual color configuration, in an effort to expand the non-intrusive accessibility towards lower pressure regime for neutral gas and plasma diagnostics.

Torr-level, seedless, non-resonant velocity distribution function measurement with a dual-color, single-shot coherent Rayleigh–Brillouin scattering scheme

“…A 3D CAD model of the chamber and the propagation directions of the four CRBS beams are shown in figure 3 where a schematic of the four wave vectors is inset. Three input laser beams (two 1064 nm pump beams and a 532 nm probe beam; all beams operating at a 10 Hz repetition rate) were generated by a custom-built frequency agile dual-color laser system, which is described in detail in [41]. Here we provide a short description of its operation.…”

Nano scattering particle: an approach to improve quality of the commercial led

“…The Mie-scattering function [23][24][25][26] of spherical particles is applied to investigate the scattering factor of the TiO2 in the phosphor layer. The calculated scattering factors include 𝜇 𝑠𝑐 (𝜆)scattering coefficients (SC) and 𝛿 𝑠𝑐reduced scattering coefficients (RSC).…”