SFG · Sisngle-qubit gate

649 nm Fiber Laser

The QTekLaser™ 649 nm Fiber Laser is a state-of-the-art system using robust sum-frequency generation (SFG) to deliver stable, narrow-linewidth (<10 kHz), polarization-maintaining light up to 6 W. With <1% power stability and an IoT-enabled interface in a compact 4U 19" rack-mount chassis, it sets a new standard for reliability in demanding environments.

6 W
Max power
< 10 kHz
Linewidth
< 1%
Power stability
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649 nm 6 W SFG fiber laser
Need a different wavelength? The 649 nm system is one configuration of our sum-frequency (SFG) platform covering 609–706 nm. We routinely build custom wavelengths across this range — tell us your target line.
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Features

  • High output power (6 W)
  • High reliability
  •  Narrow linewidth (<20 kHz)
  •  Excellent power stability (<1%)
  •  User-friendly interface via IoT technology
  • 4U 19" Rack mount
  • Certified to IEC 60825-1:2014 safety standards

Applications

  • Quantum computing
  • Single-qubit gate operations
  • Signal readout
  • Repumping
  • Mid-circuit measurement
  • Research

Sum-Frequency Generation (SFG)

The wavelength range of QTekLaserTM products can be further extended using the nonlinear process of sum-frequency generation (SFG). This architecture is illustrated in figure 1. The two fundamental lasers are usually made of different gain fiber amplifiers. The extended wavelength values are summarized in the blue-shaded cells of table 1. This method achieves high power at certain wavelengths.

Diagram of a QTekLaser laser system with a frequency sum mixer integrated.
Figure 2. QTekLaserTM sum-frequency generation (SFG) fiber laser system. The frequency sum mixer is integrated into the product.
Table 1. Wavelength extension of QTekLaser products via nonlinear frequency conversion.
Table 1. Wavelength extension of QTekLaserTM products via nonlinear frequency conversion. The red-shaded cells represent second-harmonic generation (SHG) and the blue-shaded cells sum-frequency generation (SFG).
Product Selection Guide

Specifications

Download 649 nm Fiber Laser Specifications
Category Parameter Value Unit
Laser Wavelength649nm
Operation modeCW/
Max output power6W
Output 1/e2 beam diameter1-2mm
Beam quality (M2)1.01/
Relative intensity noise (RIN) for freq. >10 kHz<-130dBc/Hz
Fiber length to chassis2m
Polarization directionVertical/
Polarization extinction ratio (PER)>20dB
Optical signal-to-noise ratio (OSNR)60dB
Electrical / Cooling Warm-up time30min
Max power consumption350W
AC power supply voltage110V
Fuse6.3A, 250VAC, 5X20mm/
Remote interlock voltage3.3V
CoolingChilled water/
Environmental Room humidity30 – 60%
Room temperature17 – 25°C
Weight~54 (120)Kg (lbs)
Class 4 Laser

QTekLaserTM lasers comply with Federal Regulations (21 CFR Subchapter J, Part 1040)  as administered by the Center for Devices and Radiological Health and are certified to IEC 60825-1:2014 standards.

It is the end user's responsibility to ensure that no significant light is retroreflected back into QTekLaserTM systems as this can degrade performance and potentially damage the lasers. To prevent this, the use of an external optical isolator is strongly recommended.  Damage due to retroreflected light is not covered under warranty.

Ordering Information

Part Number: QT-LASR-Yb-Er-SFG-649-6-W-2-2.0
Laser Type: Seed laser + Yb-doped fiber amp + Er-doped amplifier + SHG
Product Selection Guide

Performance

Beam Quality

Beam Quality: 649 nm M2 <1.1
Figure 3. Beam Quality: 649 nm M2 <1.1

Beam Profile

Beam Profile: 649 nm
Figure 4. Beam Profile 649 nm. 1/e² beam diameter of 1.35 mm horizontally and 1.55 mm vertically.

Laser Power vs. Current 

Laser Power vs. Current: 649 nm 
Figure 5. Laser Power vs. Current: 649 nm 

Relative Intensity Noise (RIN)

Relative Intensity Noise (RIN): 649 nm-130 dBc/Hz >10kHz
Figure 6. Relative Intensity Noise (RIN): 649 nm <-30 dBc/Hz >10 kHz.

Optical Spectrum

649 nm Fiber Laser OSNR
Figure 7. 649 nm OSNR 60 dB. 

Mechanical Dimensions

649 nm fiber laser mechanical dimensions.
Figure 8. 649 nm fiber laser mechanical dimensions.

Product Photos

649 nm fiber laser 2x4U chassis water cooled
Figure 9. 649 nm fiber laser, 2x4U chassis + laser head, water cooled.
532 nm complete fiber laser system 4U chassis back panel water cooled
Figure 10. 649 nm fiber laser, 4U chassis back panel water cooled.
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