Long-wavelength fiber lasers operating around 2μm (1940–2000 nm) have become increasingly important across industrial manufacturing, medical technology, and scientific research. Their wavelength closely matches the absorption characteristics of water molecules, polymers, composite materials, and biological tissue, making them ideal for applications where conventional 1μm fiber lasers are less effective.
Despite their advantages, scaling 2μm fiber lasers to kilowatt-class output has remained a significant engineering challenge. High power degradation, limited component durability, thermal instability, and inconsistent long-term performance have restricted widespread industrial adoption.
Drawing on years of experience in laser technology, Han’s Laser has introduced its 1000W 2μm Thulium Fiber Laser, designed to overcome these longstanding limitations. Combining a fully self-developed optical platform, proprietary optoelectronic components, precision multimode control, and extensive long-duration validation, the system delivers a new level of stability, reliability, and performance for high-power long-wavelength laser applications.
Why High-Power 2μm Fiber Lasers Are Difficult to Build
Compared with conventional 1μm fiber lasers, 2μm laser systems present several unique technical challenges:
- Lower pump conversion efficiency
- Greater thermal load under high-power operation
- Increased risk of beam quality degradation
- Higher sensitivity to component reliability
- Greater long-term output power attenuation
Maintaining stable kilowatt-level output over continuous industrial operation requires optimization throughout the entire laser architecture rather than improvements to individual components alone.
Han’s Laser addresses these challenges through complete vertical integration of the optical system.
End-to-End Fiber Technology Enables Higher Stability
One of the defining features of the new 2μm laser platform is its fully self-developed optical chain, covering specialty fibers, core optical components, and the complete laser architecture.
This integrated approach allows Han’s Laser to optimize every stage of energy conversion and beam generation.
Key improvements include:
- Precisely optimized fiber absorption characteristics and spectral matching to improve pump efficiency and suppress relaxation oscillation.
- Customized rare-earth doping formulations and advanced fiber manufacturing processes that reduce material defects and ion clustering for improved emission uniformity.
- Proprietary refractive index profile design that strengthens mode confinement and minimizes beam instability under high-power operation.
- System-level optimization between proprietary optical components and dedicated control algorithms for improved output consistency.
Rather than treating each component independently, the entire optical path is engineered as one integrated system, helping reduce power degradation while maintaining stable beam quality over extended operating periods.
Proprietary Core Components Strengthen Performance and Reliability
Unlike many high-power laser systems that depend heavily on third-party optical components, the Han’s Laser 2μm platform incorporates self-developed critical hardware designed specifically for kilowatt-class long-wavelength operation.
High-Efficiency 793 nm Pump Source
The dedicated 2μm pump module utilizes high-power 793 nm laser chips with excellent optical efficiency.
Advanced parallel hermetic packaging provides exceptional sealing performance, with helium leak rates below 10⁻⁸ Pa·m³/s, approaching optical communication industry standards for package reliability.
Low-Loss Pump Combiner
The proprietary pump combiner delivers:
- High coupling efficiency
- Low insertion loss under high-power conditions
- Continuous operation exceeding 500 hours
- Reliable performance through thermal cycling from −40°C to 80°C
High-Power Cladding Power Stripper (CPS)
Han’s Laser has also developed its own 2μm cladding power stripper featuring:
- Signal loss as low as 0.05 dB
- Approximately 18 dB stripping efficiency
- Minimal beam quality degradation
- Power handling capability up to 1000W
High-Transmission Laser Output Head
The laser output head achieves 99.99% transmission at 1940 nm, enabling efficient beam delivery while maintaining excellent beam quality, even in demanding industrial environments.
Together, these proprietary components improve overall system consistency while providing greater supply chain independence and long-term product reliability.
Flexible Output Control for Diverse Manufacturing Processes
Industrial laser applications often require both high power and precise process control.
The Han’s Laser 1000W 2μm fiber laser provides highly flexible operating characteristics suitable for a wide range of manufacturing tasks.
2μm 1000W Standard Model Functional Test
Key performance features include:
- Continuous linear power adjustment from 10% to 100%
- Smooth power transitions without output discontinuities
- Excellent output linearity with an R² value of 0.9997
- Real-time closed-loop power monitoring and dynamic compensation for stable output
These capabilities enable consistent processing across different materials and production requirements while simplifying process optimization.
Proven Long-Term Reliability Through Extensive Validation
Industrial manufacturers expect laser systems to operate continuously with minimal maintenance.
To verify long-term performance, Han’s Laser subjected the 1000W 2μm fiber laser to extensive endurance testing involving continuous operation, repeated start-stop cycles, and multiple operating modes.
2μm 1000W Burn-in Test
The validation demonstrated:
- RMS power fluctuation of only 0.916%, significantly below the typical performance of comparable high-power 2μm laser products.
- Extremely low long-term power degradation during extended thermal loading.
- Stable optical alignment throughout repeated operating cycles.
- No component failures or continuous output decline during prolonged testing.
The results demonstrate the laser’s ability to support demanding 24/7 industrial production while maintaining consistent performance over time.
Applications Across Advanced Industries
The 2μm wavelength offers significant advantages because many non-metallic materials naturally absorb energy more efficiently at this wavelength than at 1μm.
As a result, the laser produces narrower heat-affected zones, cleaner edges, and higher processing precision.
Typical industrial applications include:
Precision Processing of Advanced Materials
The laser is well suited for:
- Carbon fiber composites
- Glass fiber reinforced materials
- Engineering plastics
- Optical films
- Glass
- Technical ceramics
Typical processes include:
- Precision cutting
- Welding
- Micro-drilling
Compared with conventional 1μm lasers, the 2μm wavelength helps reduce issues such as delamination, edge chipping, thermal carbonization, and excessive heat damage.
These capabilities benefit industries including:
- New energy manufacturing
- Aerospace
- Consumer electronics
- Advanced composite production
Medical Technology
Because water strongly absorbs 2μm laser energy, the system is well suited for medical applications involving soft tissue interaction and may serve as an alternative laser source for certain lithotripsy procedures.
Scientific Research
The laser can also function as a reliable pump source for mid-infrared laser development, supporting applications such as:
- Atmospheric sensing
- Lidar research
- Spectroscopy
- Advanced photonics research
Specialized Industrial Applications
Additional opportunities include specialized industrial and defense-related applications such as utility maintenance, remote material processing, and other high-energy long-wavelength laser systems.
Advancing Kilowatt-Class 2μm Fiber Laser Technology
The launch of the Han’s Laser 1000W 2μm Thulium Fiber Laser represents a significant step forward in high-power long-wavelength laser development.
Built upon fully self-developed optical fibers, proprietary core components, and a deeply integrated laser architecture, the laser system addresses many of the technical barriers that have historically limited kilowatt-class 2μm fiber lasers. Its combination of stable output, low power degradation, flexible power control, and proven long-term reliability makes it a compelling solution for manufacturers, researchers, and medical equipment developers seeking dependable long-wavelength laser performance.
As demand continues to grow for precision processing of advanced materials and next-generation photonic applications, high-power 2μm fiber lasers are poised to play an increasingly important role—and Han’s Laser is helping expand what is possible with this emerging technology.
