Quasi-continuous wave (QCW) laser diode chip stacks are available in 808 and 940nm options either in passively or actively cooled versions. The powers of the QCW laser diode chip stacks can reach up to thousands of watts. Main application for these products are Ablation, Engraving, Flat panel display, LIBS, LIDAR, LIF, Surface treatment, Spectroscopy, Marking, Shockwave generation, Pumping, Remote sensing, Pointer, Designator, Illuminator, Range finder, Defense & Security
QCW (quasi-continuous wave) laser diode chip stacks are semiconductor laser devices that provide high peak power output in short pulses, typically with a duty cycle of less than 10%. These devices are commonly used in applications such as laser rangefinders, laser radar systems, and laser marking.
The fabrication process for QCW laser diode chip stacks is similar to that of CW laser diode chip stacks, with the main difference being the design of the laser diode structure to allow for high peak power output in short pulses. This is achieved through the use of epitaxial layers with high carrier density and short carrier lifetime, which allow for rapid energy release and high peak power output.
The laser diode chips are stacked and electrically connected in series or parallel to provide the desired output power and pulse characteristics. The heat generated during operation is dissipated through a heat sink and temperature control system to ensure stable and reliable operation.
One of the main advantages of QCW laser diode chip stacks is their ability to provide high peak power output in short pulses, which is well-suited for a range of applications that require high-speed and high-precision laser output, such as laser range finding and laser radar. In addition, QCW laser diode chip stacks also offer high efficiency and long lifetime.
However, QCW laser diode chip stacks require careful thermal management and current control to prevent thermal damage and ensure stable and reliable operation. This typically involves the use of temperature control systems, pulse generators, and current limiting circuits.
Overall, QCW laser diode chip stacks provide a compact and reliable solution for high-peak-power laser applications, with the added benefit of high efficiency and long lifetime.
|Wavelength, nm||Output power, W||Operation mode||Cooling||Collimation|
|808||270||QCW||actively cooled||fast axis|
|808||360||QCW||actively cooled||fast axis|
|808||450||QCW||actively cooled||fast axis|
|808||540||QCW||actively cooled||fast axis|
|808||720||QCW||actively cooled||fast axis|
|808||780||QCW||passively cooled||fast axis|
|808||900||QCW||actively cooled||fast axis|
|808||1080||QCW||actively cooled||fast axis|
|808||1560||QCW||passively cooled||fast axis|
|940||270||QCW||actively cooled||fast axis|
|940||360||QCW||actively cooled||fast axis|
|940||450||QCW||actively cooled||fast axis|
|940||540||QCW||actively cooled||fast axis|
|940||720||QCW||actively cooled||fast axis|
|940||900||QCW||actively cooled||fast axis|
|940||1080||QCW||actively cooled||fast axis|