Vertical QCW diode laser stack industry excitation light source


QCW Introduction

QCW (Quasi-continuous wave) fiber lasers are now part of the equation for modern applications. They can operate in both CW and high-peak power pulsed modes. Unlike traditional CW lasers, for QCW Fiber Lasers Come of Age Wall-plug efficiency, high PPR are just two benefits of new laser technology FABRICATING which peak and average power are always the same in CW and CW/ modulated regimes, QCW lasers’ peak power in pulsed mode is increased by a factor of 10 over the average power.

Vertical QCW diode laser stack industry excitation light source

We use Austin solder to assemble our Vertical QCW laser stack. This technology makes lasers have high reliability even in harsh working environments.

QCW & CW comparison

QCW laser diode bars can operate at higher peak powers than their CW counterparts. In addition, multiple high-peak-power QCW bars can be packaged into the same area as a single CW bar, due to the lower average waste heat of each bar running in QCW mode. These factors combine to enable compact diode pumps with very high peak powers when operating in QCW mode. In addition, QCW pumping can reduce the heat load in the laser gain medium, which tends to reduce thermal lensing effects and improve laser beam quality.

Vertical QCW diode laser stack industry excitation light source Feature

1. wavelength: 808nm or up on the requirement
2. output power: 500w up to 10kw
3. operation mode: QCW
4. cooling: actively cooled / passively cooled
5. FAC available

Vertical QCW diode laser stack industry excitation light source


  • High energy research: QCW pumping sources for solid-state lasers.
  • Medical technology: Long-pulse operation, use in esthietics(epilation) and dermatology.
  • Excitation light source for solid-state lasers in the 1320nm range for parenchyma surgery.
  • Defense: Short-pulse operation, use as a pumping source, for lighting or in LIDAR systems.
  • Industry: Excitation light source for solid-state and fiber lasers.

Vertical QCW diode laser stack industry excitation light source


Model VSQCW-MIMA-100~500-N VSQCW-MIMA-100~500-N-FAC
Optical parameters
Output power(w) QCW 100~500-N
Output power after collimation (w) 90~450*N
Center Wavelength at 25℃ (nm) 808 808
Number of bars in one stack 1~20 1~20
Bar pitch (mm) 1.8/0.8~3 1.8/0.8~3
Center wavelength variation at 25℃ (nm) ±3/±10 ±3/±10
Typical Spectral Bandwidth (FWHM) <3 <3
Typical Fast Axis Divergence 95%(°) 66
Typical slow Axis Divergence 95%(°) 10 10
Fast Axis Divergence (Full Power)(°) <0.5
Polarization TE TE
Wavelength shift (nm/℃) ~0.28 ~0.28
Electrical Parameters
Working mode QCW QCW
Maximum Duty Cycle (%) ≤20% ≤20%
Pulse Length (us) 50~1000 50~1000
Frequency (Hz) 1~1000 1~1000
Operation current (A) ≤100~500 ≤100~500
Operating Voltage (V) ≤2*N ≤2*N
Typical Slope (W/A) >1.1 >1.1
Electro-optic Conversion Efficiency (%) >50 >50
Thermal Parameters
Operation Temperature (℃) -40~60/20~30 -40~60/20~30
Storage Temperature (℃) -50~85/0~55 -50~85/0~55
Storage Humidity (%) <70 <70
Cooling Passively cooled actively cooled Passively cooled actively cooled
Flow rate per bar (L/min) */0.3-0.8 */0.3-0.8


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