780 nm Fiber Laser

Product Description

The QTekLaser™ 780 nm Fiber Laser delivers stable, narrow-linewidth (<5 kHz) output at power levels >10 W from a reliable all-fiber, polarization-maintaining architecture. Designed for demanding quantum, precision measurement, and advanced photonics applications, the system combines exceptional spectral purity with long-term operational stability. Optimized for rubidium-based atomic systems and quantum technologies, the 780 nm wavelength is widely used in neutral-atom quantum computing, laser cooling, atom interferometry, atomic clocks, precision spectroscopy, and ultra-sensitive magnetometry. The laser’s narrow linewidth and robust PM fiber design make it ideal for frequency stabilization, coherent manipulation, and high-precision atomic control. An intuitive IoT-enabled control system provides streamlined remote operation and monitoring from a laser head to a 4U 19″ rack-mount chassis. Built for continuous operation in challenging laboratory and production environments, system delivers the performance, reliability, and stability required for next-generation quantum and precision measurement systems.

Download 780 nm Fiber Laser Specifications

Figure 1. QTekLaser^TM 780 nm fiber laser.

Features

High output power (>10 W)
High reliability with all-fiber design
Narrow linewidth (<5 kHz)
Excellent power stability (<1%)
User-friendly interface via IoT technology
4U 19" Rack mount to a laser head
Certified to IEC 60825-1:2014 safety standards

Applications

Quantum computing
Laser cooling and trapping
Optical pumping / state preparation
State detection
Precision measurement

Second-Harmonic Generation (SHG)

QTekLaser^TM 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 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^TM 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.

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

Figure 2. QTekLaser^TM fiber laser system with an integrated frequency doubler.

Specifications

Download 780 nm Fiber Laser Specifications

Wavelength	780.85 nm
Output power	>10 W
Power stability	<1%
Operation Mode	CW
Laser linewidth	<5 kHz
Wavelength tuning range	>20 pm
Polarization Extinction Ratio (PER)	20 dB
Polarization direction	Vertical
Beam quality	TEM00, M²<1.05
Output mode	Free space, collimated with ~2 mm 1/e² diameterr
Relative Intensity Noise (RIN)	-140 dBc/Hz >10kHz
Optical Signal-to-Noise Ratio (OSNR)	60 dB
Operating temperature	17-25 °C
Warm-up time	~10 min.
Cooling mode	Water cooling
Laser Head Size	15"x10"x4.82"
Chassis	4U 19" Rack mount
Max. power consumption	254 W

QTekLaser^TM 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^TM 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.