450nm Blue Lasers

450nm Blue Lasers

Blue laser has superior efficiency. Physics dictates the efficiency of energy absorption. Compared to industry-standard IR wavelength, blue absorption is maximum 66x better and blue laser enable process speed gains of 2-10x.

STR Series Fiber-coupled Blue Laser Diodes

fiber-coupled blue diodes


  • Optical fiber output
  • High reliability and long life time
  • Free-maintenance operation
  • High electro-optical conversion efficiency
  • Easy control ports
  • High modulation frequency

Main Applications:

  • Welding & cladding of copper
  • 3C & new energy
  • Research

Part Numbers:

fiber-coupled blue diodes

  1. STR-B means blue lasers
  2. Output power in watts
  3. Wavelength. B means 915nm, C means 976nm, D means 940nm, E means 808nm, F means 450nm
  4. Fiber length in meter, 5m or 10m or custom-made
  5. Connection type, A means iHQB connection, B means SMA905 connection, C means D80 connection
  6. Cooling method, W means water cooling, T means TEC cooling, and A means air-cooling
  7. Fiber core diameter in um

Main Technical Specifications:

Optical Parameters

  • Output laser power: 500W
  • Operation mode: CW/modulation
  • Polarization: random
  • Power adjustable range:10~100%
  • Central wavelength: 430-470nm
  • Output power un-stability: <3%
  • Modulation frequency:50~10kHz
  • Red pointer power: 0.25~1mW

Output fiber parameters:

  • Fiber connector: iHQB
  • Fiber core diameter: 400μm
  • Minimum bending diameter:>300mm
  • Beam divergence angle: <0.22mrad
  • Output fiber length:5m (or custom-made)

Electrical parameters:

  • Input electricity: single phase 220VAC±10% 50/60Hz
  • Control: RS-232/AD

Other parameters:

  • Outline size: (W×H×D): 447×238×850mm
  • Weight: <60kg
  • Operation environmental temp.: 10~40℃
  • Operation environmental humility: <70%
  • Storage temp.:-10~60℃
  • Cooling: water

STN Series High Power 450nm Blue Lasers

Our industrial high power blue lasers leverage fundamental physics and their high-brightness, high-power design to produce the fastest, highest quality laser materials processing, including laser welding and additive manufacturing of copper, gold, aluminum and other industrially important metals.

The high power blue laser welds copper faster and better than any alternative solution. This advantage springs from fundamental physics: copper absorbs blue light better than it absorbs infrared radiation or other colors of light. Aluminum, gold and other important industrial metals also absorb more blue than they do other wavelengths of light. That basic fundamental physical advantage leads to performance advantages for welding copper, welding aluminum, 3D printing, and other materials processing applications.

450nm blue laser


  • High quality low to spatter-free welding
  • Dramatically improves process performance and process window
  • Enables welding processes not possible or with low yields with IR


  • 2x to 10x metal processing performance of IR fiber lasers that are industry-standard
  • Blue wavelength offers superior performance over green as well

Advantages of Blue Laser Processing:

IR lasers have always had difficulty welding copper due to low absorptivity (~5%) (need high peak power) and high thermal diffusivity. As a result, IR lasers can only operate in keyhole mode generating and there are following limits:

  • High spatter
  • High porosity and defects
  • Poor mechanical & electrical variability
  • Poor yields
  • High difficulties to weld dissimilar metals (Cu/Al & Cu/SS)

450nm blue laser

Absorption Is Everything

Blue laser has superior efficiency. Physics dictates the efficiency of energy absorption. Compared to industry-standard IR wavelength, blue absorption is maximum 66x better and blue laser enable process speed gains of 2-10x.

450nm blue lasers

SPATTER-FREE™ Copper Conduction & Keyhole Welding Modes

  • Our blue laser enables conduction welding mode currently not possible with infra-red lasers at thin and mid-size thicknesses and up to 25m/min
  • Our blue laser enables keyhole welding at power starting at 150W
  • Both modes operate SPATTER-FREE™

Technical Specifications:

Model STN-AO-200 STN-AO-650 STN-AI-1500
Wavelength 450nm 450nm 450nm
Band width 10nm 10nm 10nm
Laser power 200W 650W 1500W
Power adjustment 0-100% 0-100% 0-100%
Power stability (8 hours) 3% at full power 3% at full power 3% at full power
Fiber core diameter 200um 400um 125um
Fiber numerical aperture 0.22 0.22 0.22
Beam production parameter <15 <30 <11
Standard fiber length 5m, QBH connector 5m, QBH connector 5m, QBH connector
Power input 220VAC/50/60Hz, <6A 220VAC/50/60Hz, <20A 380VAC/50/60Hz, <19A
Dimension (DxWxH) 643x443x133mm 975x610x600mm 643x483x355mm
Weight 28kg 150kg 55kg

Typical Applications:

Energy Storage

  • Cu conduction welding
  • Cu and Al foils welding
  • Cu/Al welding
  • Tab welding

Consumer Electronics

  • Cu conduction welding
  • Cu/Al and Cu/SS welding
  • Al welding


  • Welding & braising
  • Cutting
  • Laser metal deposition
  • 3D printing


  • Laser metal deposition
  • 3D printing
  • General welding & cutting


  • Welding
  • Laser metal deposition
  • 3D printing


  • General welding & cutting
  • Laser metal deposition
  • 3D printing

450nm blue lasers

450nm blue laser

450nm blue lasers

STK Series Fiber-coupled Blue Lasers

The STK series fiber-coupled blue lasers are manufactured by adopting specialized fiber-coupling techniques, resulting in high efficiency, stability and superior beam quality. The asymmetric radiation from the laser diode chips are coupled into an output fiber with small core diameter by using special micro optics. Their prices are reasonable and cheaper in the market.

Part Number STK450FFBFN-0.8W STK445F03N-3W STK445FTRFN-20W STK445FTRFN-50W STK445FGRFN-200W
Optical Parameter Laser power(W) 0.8 3 20 50 200
Wavelength(nm) 450 445 445 445 445
Tolerance(nm) ±10 ±10 ±10 ±10 ±10
Spectral width(nm) <6 <6 <6 <6 <8
Temperature drift (nm/K) 0.3 0.1 0.1 0.1 0.1
Fiber Data Core dia.(um) 105 105 105 200 200
NA 0.22 0.22 0.22 0.22 0.22
Fiber Length (m) 1.0 1.0 3.5 3.5 2.0
Connector NIL SMA905 SMA905 SMA905 SMA905
Thermistor K Ohm option 10 10 10
Electrical Parameter Operation(A) 1.0 3.0 2.5 2.8 2.5
Threshold current(A) 0.25 0.3 0.3 0.3 0.3
Operation voltage(V) 4.8 5.2 41 81 220
Others Operation temp.(oC) 15-35 15-35 15-35 15-35 15-35
Store temp.(oC) -20-+70 -20-+70 -20-+70 -20-+70 -20-+70
Dimension(mm) 30x12.7x14.8 20x13.6x16 143x68x37 143x68x37 246x204x47
Pilot option