2-kW cw fiber-coupled diode laser system

Eliminating dead spaces of the laser diode stack in the fast-axis direction using a plane-parallel plate array

“…High-power laser diode ͑LD͒ arrays ͑including the LD bar͒ are attracting the attention of many optical researchers in many fields, such as medicine, solid-state laser processing, and fiber laser pumping, [1][2][3][4][5] because of its high electrical-tooptical efficiency, compact structure, stability, and other unique advantages. Because of lateral confinement, the output beam of LD has different divergence angles in the perpendicular and parallel direction of the PN junction, which are called the slow-axis direction and fast-axis direction.…”

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“…[5,6] materials as a diode-pumped high-peak-power laser material due to its wide emission spectral range, low nonlinear refractive index and high thermal conductivity. A diode-pumped laser oscillator has been developed at room temperature in a free running mode.…”

Characteristics of high-power diode–laser welds for industrial assembly

“…This system is capable of carrying out 'keyhole mode' welding and has successfully produced welds in Al, Ti and steel. 9 Abe et al . 10 used this diode laser system to investigate the effect of shielding gas flow rate and nozzle angle (with workpiece) on welding speed and penetration.…”

“…Conduction mode welding was carried out on very thin metal sheets and at slow welding speeds: 0.8 mm thick sheet steel at 1m/min; 2 mm Al alloy sheet at 0.35 m/min; 3 mm Mg sheet at 0.4 m/min. 6 A 2 kW HPDL system has been developed by Jenoptik 9,10 which has a beam diameter of 0.96 mm and intensity of 2.35x10 5 W/cm 2 . This system is capable of carrying out 'keyhole mode' welding and has successfully produced welds in Al, Ti and steel.…”