Quasi-CW Thulium Lasers

TLM-50/500-QCW Thulium quasi-cw fiber lasers provide up to 5 mJ per millisecond pulses at 1.94 μm wavelength at pulse repetition rates up to 2.5 kHz. Customer can select beam mode quality optimal for the application from single-mode to multi-mode. These compact energy efficient and reliable lasers are used in a diverse range of industrial, scientific and medical applications including laser pumping, welding of transparent polymers and a variety of surgical applications such as open, laparoscopic and endoscopic inclusion, excision, resection, ablation, vaporization, coagulation and hemostasis of soft tissue in urology, urinary lithotripsy and general surgery. Special models for integration into OEM medical equipment are available.



Wavelength 1.94 μm Maximum Peak Power 500 W
Pulse Energy up to 5 J Pulse Duration 0.2-50 ms
Maximum Average Power 50 W Single-mode or Multi-mode Beam Quality
Wavelength*, nm 1943 typ. 1880 min., 2100 max.
Emission Bandwidth FWHM, nm <2
Mode of Operation CW or Pulsed
Pulse Repetition Rate, kHz Single Pulse to 2.5
Maximum Average Power, W 50
Maximum Peak Power, W 500
Maximum Pulse Energy, J 5
Pulse Duration, ms 0.2-50
Power Tunability, % 10-100
Power Stability**, % ±1 typ.
Output Fiber Core Diameter, μm Single-mode, 50, 100, 200
Single-mode Beam Quality, M2 <1.05 
Multi-mode Beam Parameter Product, mm × mrad 

2.5 @ 50 μm

5 @ 100 μm

10 @ 200 μm

* Other wavelengths in the specified range are available upon request.

** Over 4 hours, T=const

Dimensions*** (W × D × H), mm

336 × 435 × 148

Weight, kg




Supply Voltage, VDC


Power Consumption, W

700 typ.

*** Special TLM-QCW modules for medical integration and TLR-QCW rack-mounted units are available upon request. Please contact IPG for more details.

TLM-50-500-QCW Datasheet


Scientific, Industrial and Medical Applications Open and Endoscopic Surgery in Urology
Welding of Transparent Polymers Lithotripsy and Percutaneous Urinary Lithotripsy
Mid-IR Solid State Laser Pumping General Surgery
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