Mid-Infrared Tunable Fiber Femtosecond Laser UltraTune 3400 3400-35
A patented nonlinear process inside the amplifier generates high average power (>500mW) with broad mid-infrared tuning from 3 to 3.4 µm. Fiber construction provides reliable long-term operation without alignment. UltraTune 3400 is a compact, maintenance-free, tunable commercial mid-IR ultrafast laser for spectroscopy and nonlinear optics. Compared with complex, mechanically tuned, bulky, expensive conventional lasers, UltraTune 3400 offers watt-level power, single-mode fiber output, motorized tuning, and compact lightweight construction. Broad tuning and high peak power support laser-matter interaction with molecules such as water, nitrogen dioxide, and methane. Applications include frequency combs, broad spectra, seed sources (OPO, OPA, OPC, OPCPA, DFG), quantum fibers, THz waves, supercontinuum generation, pump-probe experiments, femtochemistry, hyperspectral imaging, and microscopy. The mid-IR range and peak power particularly suit H2O, NO2, and CH4 interactions. Hydrocarbon absorption: Depending on material, CH-group absorption lies at 3.3-3.4 µm. Interaction is over 100 times more efficient than NIR. For industry, UltraTune 3400 combines strong UV-like absorption without polymer denaturation with fiber-laser reliability and beam quality. Robust automatic mode locking: Ultratune 3400 uses a mode-locked oscillator producing 2800 nm femtosecond pulses, separately available as Ultra 2800. Femtum's integrated feedback ensures reliable self-starting in the femtosecond regime, with no warm-up or external adjustment. Clean, pedestal-free temporal and spectral profiles: Nonlinear tuning gives UltraTune 3400 a nearly ideal sech² spectrum. At selected center wavelengths, power spectral density exceeds 10 dBm/nm, over 100 times commercial mid-IR supercontinuum sources and over 10000 times blackbody radiation, benefiting sensing, microscopy, and spectroscopy requiring signal-to-noise and selectivity. Typical mid-IR spectral FWHM exceeds 40nm. Autocorrelation shows nearly constant ~200fs pulses across tuning, without pedestal-transform limitations. Stable pulses exceed 50kW peak power for efficient nonlinear interactions in mid-IR crystals or fibers. A typical 3200 nm autocorrelation estimates 214fs duration. Long-term stability: Proprietary fiber components and a robust free-space architecture provide stability. The plot measures average power at 3400nm over 24 hours. At 3400nm, the relative standard deviation after 24 hours is estimated at 0.25%. Beam pointing and Gaussian quality: Ultratune 3400 is fully fiber-based and single-mode throughout tuning. Previous 2800 nm measurements give M²<1.3. Its delivery cable and unique collimator guide light to microscopes, scan heads, processing stages, or confined spaces without pointing errors when changing wavelength. A thermal-sensitive card shows the beam profile qualitatively. Controller: computer control via Ethernet.
Overview
Specifications
| Parameter | Value |
|---|---|
| Center Wavelength | 3 - 3.4µm |
| Bandwidth [FWHM] | > 40nm |
| Average Power | > 100mW (> 500mW @ 3400nm) |
| Pulse Energy | > 3.5nJ (> 17 nJ @ 3400nm) |
| Repetition rate | ~ 35MHz (> 50MHz optional) |
| Peak Power | ~ 1 - > 50kW |
| Pulse duration | < 500fs |
| Spot Diameter | ~ 3 or 9mm |
| M2 (average over X and Y directions) | < 1.3 |
| Output Polarization | Random |
| Dimensions [Rack-Mount ;3U] | 19 × 5.5 × 20.5 inches . ( Rack-Mount ,3U) |
| Cooling | Air Cooling |
| Voltage | 100/240V AC, 50/60Hz |
| Beam Delivery | Free-space or fiber output |
Applications
Key Features
Datasheet
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