Flashlamp pumped Cr:LiSrAlF6 laser

Abstract

Tunable, flashlamp-pumped laser properties are discribed for the crystal Cr:LiSrAlF6 (Cr:LiSAF) in both long pulse and Q-switched modes of operation. Slope efficiencies of 5%, overall efficiency of 3%, and a tuning range from 780 to 1010 nm are reported.

Spectro-Temporal Evolution and Transient Resonator in Solid-State Cr 3+: LiSAF Laser Emissions

“…We numerically solve rate Equations (1) and (2) to investigate the resonator transients of the solid-state Cr: LiSAF laser pumped by diode laser pulses. The parameters used in this simulation are as follows: L = 5 cm; l = 0.3 cm; η = 1.41; τ g = 67 μs; R 1 = 0.3; R 2 = 1; τ P = 100 μs; effective laser beam diameter on the laser gain medium d g = 1 mm; c = 3 × 10 8 m/s; r = R P /R Pth ; σ gi is quoted in [7][8][9]. We used 12 coupled equations, one equation for the excited state population and 11 equations for the monochromatic intensities chosen at a constant 20 nm spectral interval.…”

Transition-metal-doped chalcogenide glasses for broadband near-infrared sources

“…Of particular interest are iron, nickel, chromium and cobalt which all exhibit broad infrared emission over the entire telecoms window leading to the possibility of a laser or optical amplifier for use in fibre optic communications, remote sensing and variety of medical, industrial and aerospace applications. Tuneable solid state lasers based on transition metal doped crystals have been demonstrated previously 5,6 . However there are problems associated with producing active optical devices with these materials because in order to excite the transition metal ions and create a resonant cavity required to achieve lasing, optical systems must be designed and built using various components such as mirrors, filters, etc.…”

"Desenvolvimento de um amplificador de pulsos ultracurtos de Cr:LiSAF para um sistema laser híbrido de alta potência"

“…A ação laser no Cr:LiSAF foi demonstrada para vários esquemas de bombeamento que incluem lasers de íons, lâmpadas e lasers de diodo [119,135,136,137] , demonstrando emissão em regimes CW [138] e pulsados. Pulsos com durações variando de centenas de microssegundos, sob excitação pulsada, até nanossegundos em regime de chaveamento-Q e poucos femtossegundos em travamento de modos [46] foram obtidos.…”

“…1989 -1º laser de Cr:LiSAF [119] Laser de Kr 300 mW, 1ms (modulado) 1% Cr ∅5 × 2,73 mm 1991 -1º laser bombeado por lâmpada [135] Lâmpada de Xe 100 J, 120 µs 4% Cr ∅6,35 ×100 mm 3 120 µs 1 1991 -1º laser bombeado por diodo [136] Diodo 265 mW, 100 µs 2% Cr 3 mm 220 µW 10 1992 -1º travamento de modos [139] Laser 1994 -Maior taxa de repetição e potência [140] Lâmpada Xe 4,5W 12…”

“…Lasers de Cr:LiSAF sintonizáveis bombeados por lâmpada [75,135,140,141] foram desenvolvidos, atingindo energias de até 8,8 J por pulso, e amplificadores de pulsos, também bombeados por lâmpadas [74,75,142,143] , atingiram potências de pico de até 8,5 TW. Na Tabela II-9 são mostrados alguns amplificadores de Cr:LiSAF, quase todos em sistemas híbridos (com osciladores principais de Ti:Safira).…”