High-power All-fiber SHG Laser System

Features

506-540 nm; 765-805 nm
High output power (up to 22 W)
High reliability with all-fiber design
Narrow linewidth (<20 kHz)
Excellent power stability
User-friendly interface via IoT technology
3 or 4U 19" Rack mount
Certified to IEC 60825-1:2014 safety standards

Applications

Laser cooling and trapping
Atomic interferometry
Quantum sensing
Quantum computing

Second-Harmonic Generation (SHG)

QTekLaser™ 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 1; red-shaded cells of table 1). With the development of periodic poled crystal technology and the associated waveguide technology, nonlinear frequency conversion has become a powerful tool to extend the application scope of fiber lasers. For QTekLaser™ products, the max power of the converted laser light is constrained by the damage threshold of commercially available nonlinear crystals, which is typically several tens of watts.

SFG Output Wavelength Matrix

	SF-AMP-Tm² (865 – 1030 nm)	SF-AMP-Yb (1012 – 1112nm)	SF-AMP-Er (1530 – 1610 nm)	SF-AMP-Tm (1730 – 2060 nm)
SF-AMP-Yb (1012 – 1112 nm)	466 – 535 nm	506 – 556 nm
SF-AMP-Er (1530 – 1610 nm)	553 – 628 nm	609 – 658 nm	765 – 805 nm
SF-AMP-Tm (1730 – 2060 nm)	576 – 687 nm	638 – 722 nm	812 – 904 nm	865 – 1030 nm

Table 1. Wavelength extension of QTekLaser™ products via nonlinear frequency conversion. The red-shaded cells represent second-harmonic generation (SHG) and the blue-shaded cells sum-frequency generation (SFG).

Diagram of a QTekLaser laser system with a frequency doubler integrated.

Figure 1. QTekLaser™ fiber laser system with an integrated frequency doubler.

SHG Fiber Laser with Waveguide Technology

Specifications

QTekLaser™ 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 QTekLaser 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

Product Selection Guide SHG waveguide fiber laser ordering information

Model: QT-LASR-SHG-767-2-A-2-2.0-0 and QT-LASR-SHG-770-2-A-2-2.0-0 are widely used for laser cooling and trapping of potassium atoms
Model: QT-LASR-SHG-780-2-A-2-2.0-0 and QT-LASR-SHG-795-2-2-A-2.0-0 are widely used for laser cooling and trapping of rubidium atoms
Model: QT-LASR-SHG-805-4-W-0-2.0-0 is widely used for optical tweezer trapping of neutral atoms

Performance

Power Stability: 780 nm

RIN vs Frequency: 795 nm 4W

SHG Conversion vs Pump Current

Spectrum of Fundamental Light

SHG Fiber Laser with Cavity-Free Technology

Specifications

Parameter	506-540 nm	765-805 nm
Output power	1-16 W	1-22 W
PER	20 dB	20 dB
Power stability	<1.5%	<1.5%
Laser linewidth	<20 kHz	<20 kHz
Operating temperature	17-25 °C	17-25 °C
Wavelength tuning range	0.5 nm	0.5 nm
Cooling mode	Forced air / Water cooling	Forced air / Water cooling
Beam quality	M²<1.25	M²<1.25

QTekLaser™ 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 QTekLaser™ 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

Product Selection Guide

QT-LSR-BSHG	-Wavelength (nm)	-Power (W)	-Cooling	-Linewidth
	506-540	1-16	A: forced air W: water cooling	0: <10 MHz 1: <3 MHz 2: <20 kHz 3: other
	765 -805	1-22	A: forced air W: water cooling	0: <10 MHz 1: <3 MHz 2: <20 kHz 3: other