650nm DPSS diode laser with output power from 100mW-4000mW. The Max output power of 100mW, 500mW, 1000mW, 2000mW,3000mW and 4000mW are listed with prices,contact us if you need other output power.

What is the difference between 655/650nm and 638nm red?

Professional diode laser systems are usually equipped with 638nm red diodes. These have a very good visible red color and can be proper collimated to good beam shapes. The handling of these kind of diodes is quite tricky, especially if there is the need of combining more than two diodes. We use this diode type in our professional laser systems. Most Chinese manufacturers are not able to handle this kind of diodes.

The 655/650nm red is easier in handling and cheaper, although the beam profile is worse. This kind of diodes is normally not suitable for optically combining more than two single diodes, that’s why the red power is somehow limited. We use this diode type in our budget systems to have a very good price-performance-ratio. The red color is somewhat deeper.

Below you can see the the visibility curve of the different color spectrums. Lime color is at best visibility point, whereas red and blue ar worse visible.

The red and the blue color react completely different if mixed with green (which is done in RGB color mixture): Whereas blue (445nm( can be smoothly enriched with green and gains much visibility with only having small portions of green added (and smoothly turns to different cyan tones), the red color very soon turns into orange and yellow if mixed with green.

If you have a 500mW version , that means you will get a variable power from 0mW to 500mW.

Wavelength (nm): 650

Output Power (mW): 100~4000

Max Output Power (W): 0.1~4

Working Mode: CW

Beam Mode: Quasi TE00

Spectral Linewidth (nm): <1.5

Polarization: Line polarization

Polarization Ratio: >50:1

Beam Quality (M2 factor): <20

Beam Divergence (full angle, mrad): Square,6.0*6.0

Beam Diameter at Aperture (mm): 3.0-4.0

Power Stability (RMS, over 8 hours): <5%

Aperture Position (mm): 25

Laser Head: Dimensions (L-W-H, mm)136 x 50 x 45;Net Weight (kg)0.5;

Integrated Driver Model: VD-I Series / VD-II Series

External Modulation: 5V TTL / 5V Analogue

Modulating Frequence: 30KHz TTL / 10KHz Analogue

Cooling System: TEC + Air cooled

Warm-up Time (minutes): <15

Operation Temperature (℃): 18~30

Expected Lifetime (hours): >10000

Warranty Time: 1 year