Passively Q-switched microchip Er, Yb:YAl_3(BO_3)_4diode-pumped laser

Abstract

We report, for the first time to our knowledge, a diode-pumped cw and passively Q-switched microchip Er, Yb:YAl(3)(BO(3))(4) laser. A maximal output power of 800 mW at 1602 nm in the cw regime was obtained at an absorbed pump power of 7.7 W. By using Co(2+):MgAl(2)O(4) as a saturable absorber, a TEM(00)-mode Q-switched average output power of 315 mW was demonstrated at 1522 nm, with pulse duration of 5 ns and pulse energy of 5.25 μJ at a repetition rate of 60 kHz.

Structure and nonlinear optical properties of novel transparent glass-ceramics based on Co2+:ZnO nanocrystals

“…Phosphate glass [6,7] and crystalline borate [8] lasers can be efficiently Q-switched by Co:MgAl 2 O 4 spinel single crystals using the saturable absorption related to the 4 A 2 ( 4 F) → 4 T 1 ( 4 F) transition of tetrahedrally coordinated Co 2+ ions. Indeed, the emission wavelengths of these lasers (1.54 … 1.60 μm) perfectly match the absorption band of Co:MgAl 2 O 4 single crystals.…”

Monolithic thermally bonded Er 3+ , Yb 3+ :glass/Co 2+ :MgAl 2 O 4 microchip lasers

“…The radiation at this wavelength is considered to be "eye-safe" and its transmission in the atmosphere and in optical fibres is very high. For this reason many different glass as well as crystalline active media doped with erbium and ytterbium ions have been developed for the last two decades [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Crystals are characterized by good mechanical and thermal properties but because of up-conversion processes their operation efficiency is limited.…”

Comparison of laser generation in thermally bonded and unbonded Er3+,Yb3+:glass/Co2+:MgAl2O4 microchip lasers

“…Recently the use of these lasers in teledetection systems (rangefinders/Lidar) has largely increased. Thus there is an intensive research work to improve the output performances of the microchip eye safe lasers, especially the peak power and the beam quality [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”