795 nm Fiber Laser

Product Description

The QTekLaserTM 795 nm fiber laser utilizes second-harmonic generation (SHG), providing all-fiber narrow-linewidth polarization-maintaining (PM) light at a power levels up to 4 W. A smart internet-of-things (IoT)-based control system is adopted to enable user-friendly interface. The system is packaged in a typical industrial 3U 19" rack-mountable chassis.

Product Selection Guide
532 nm 14 W second-harmonic generation (SHG) fiber laser.
Figure 1. QTekLaserTM 795 nm fiber laser.

Features

  • 795 nm
  • Output power 4 W
  • High reliability with all-fiber design
  •  Narrow linewidth (<1 MHz)
  •  Excellent power stability (<1%)
  •  User-friendly interface via IoT technology
  • 3U 19" Rack mount
  • Certified to IEC 60825-1:2014 safety standards

Applications

  • Quantum computing
  • Quantum sensing
  • Atomic interferometry
  • Laser cooling and trapping 
  • Research

Second-Harmonic Generation (SHG)

QTekLaserTM offers laser systems with extended wavelength range by combining nonlinear frequency conversion technologies. Through second-harmonic generation (SHG) we achieve significant laser power at the visible and NIR regime (figure 2;  red-shaded cells of table 1).  With the development of waveguide technology, nonlinear frequency conversion has become a powerful tool to extend the application scope of fiber lasers.

Wavelength extension of QTekLaser products via nonlinear frequency conversion. The red-shaded cells represent SHG and blue-shaded cells SFG.
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).
fiber laser system with an integrated frequency doubler
Figure 2. QTekLaserTM fiber laser system with an integrated frequency doubler.

Specifications

Wavelength795 nm
Output power4 W
Polarization Extinction Ratio (PER)20 dB
Power stability<1%
Laser linewidth<1 MHz
Operating temperature17-25 °C
Cooling modeAir or Water cooling
Beam qualityTEM00, M2 ~1.0
Output modePM780-HP with FC/APC connector
Relative Intensity Noise (RIN)<-135 dBc/Hz >10kHz
Side-Mode Supression Ratio (SMSR)60 dB
Chassis3U 19" Rack mount
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-SHG-795-4-A-2-1.5-0
Laser Type: Seed laser + Er-doped fiber amp + SHG
Product Selection Guide

Performance

Beam Profile

Beam Profile: 795 nm
Figure 3. Beam Profile 795 nm. The beam is collimated with a Thorlabs F220APC-780 collimator, not included. It exhibits an excellent, round Gaussian profile with a 1/e² beam diameter of 1.9 mm.

Laser Power vs. Current 

Laser Power vs. Current: 795 nm 
Figure 4. Laser Power vs. Current 795 nm.

Optical Spectrum

Optical Spectrum: 795 nm SMSR 60 dB
Figure 5. Optical Spectrum: SMSR 60 dB 795 nm.

Relative Intensity Noise (RIN)

Residual Intensity Noise (RIN) 795 nm, -135 dBc/Hz >10kHz
Figure 6. Relative Intensity Noise (RIN): <-135 dBc/Hz >10kHz 795 nm.

Tunability
Frequency vs. Seed Laser Temp.

795 nm tunability, frequency vs. seed laser temp.
Figure 7. Tunability: Frequency vs. Seed Laser Temp. 795 nm.

Tunability
Wavelength vs. Seed Laser Temp.

795 nm tunability, wavelength vs. seed laser temp.
Figure 8. Tunability: Wavelength vs. Seed Laser Temp. 795 nm.

Tunability
Frequency vs. Seed Laser Current

795 nm tunability, frequency vs. seed laser current
Figure 9. Tunability: Frequency vs. Seed Laser Current 795 nm.

Tunability
Wavelength vs. Seed Laser Current

795 nm tunability, wavelength vs. seed laser current
Figure 10. Tunability: Wavelength vs. Seed Laser Current 795 nm.

Optimal SFG Temperature vs. Wavelength

795 nm optimal SFG temp vs. wavelength
Figure 11. Optimal SFG Temperature vs. Wavelength 795 nm.

Mechanical Dimensions

795 nm complete fiber-laser system mechanical dimensions.
Figure 12. 795 nm fiber laser mechanical dimensions.

Product Photos

532 nm complete fiber laser system 4U chassis water cooled
Figure 13. 795 nm fiber laser 3U chassis air cooled
532 nm complete fiber laser system 4U chassis back panel water cooled
Figure 14. 795 nm fiber laser 3U chassis back panel air cooled
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411 Waverley Oaks Road, Suite 114, Waltham, MA 02452 USA | +1 781-373-1446 | sales@qteklaser.com