Power stability, linewidth, beam quality
MIL-W-3900 is a 3900 nm CW laser. Used for spectroscopy, remote sensing, medical. CW Mid-Infrared Laser. Key specifications: operating mode CW, output / average power 50~800 mW, wavelength deviation (nm) ±30. View specifications, datasheet and enquiry options from Precisometer.
Specifications
13 specification rows
| Operating mode | CW |
|---|---|
| Output / average power | 50~800 mW |
| Beam / notes | CW Mid-Infrared Laser |
| Wavelength deviation (nm) | ±30 |
| Power stability (rms, 4 hours±3℃) | <5%, <3% |
| Beam divergence, full angle (mrad) | <11 |
| Beam diameter at the aperture (1/e2,mm) | <11 |
| Beam height from base plate (mm) | 103 |
| Warm-up time (minutes) | <10 |
| Cooled method | Air Cooled |
| Operating temperature (℃) | 15-35 |
| Power supply (100-240VAC) | RAD1PS |
| Expected lifetime (hours) | >10000 |
Application context
Applications named on this model’s datasheet, expanded with the model’s optical specifications.
MIL-W-3900: 3900 nm emission sets the excitation and detector-band choice for Spectroscopy; linewidth and wavelength stability determine how cleanly weak spectral features can be separated from the laser line. The listed beam characteristic (<11) also controls focusing and collection geometry.
MIL-W-3900: 3900 nm emission determines compatible optics, coatings and detectors for Remote sensing. The catalogued beam parameter (<11) helps predict how the source will focus and propagate through the instrument.
MIL-W-3900: 3900 nm emission determines compatible optics, coatings and detectors for Medical. The catalogued beam parameter (<11) helps predict how the source will focus and propagate through the instrument.
System integration
Use these checks to connect MIL-W-3900 to the surrounding optical, mechanical and control system. Every value shown is taken from this model's own specification record.
Technical FAQ
Cooled method: Air Cooled · Operating temperature (℃): 15-35. Provide the stated cooling method and keep the laser-head base thermally coupled; temperature drift moves wavelength, output power and beam pointing.
Beam divergence, full angle (mrad): <11 · Beam diameter at the aperture (1/e2,mm): <11. Size the downstream optics from the stated beam diameter and divergence rather than from the aperture of the housing, and confirm the polarisation state before specifying isolators or polarising optics.
Share wavelength, operating mode, output power or pulse energy, linewidth or pulse width, delivery, control, and safety requirements and we will qualify the matching configuration and lead time.
Model selection
Compare MIL-W-3900 with the closest available models in the CW Lasers family. Confirm option-dependent values on the final configuration before ordering.
| Selection parameter | MIL-W-3900 (current) | MIL-V-3900 | MDL-XN-3900 |
|---|---|---|---|
| Wavelength | 3900 nm | 3900 nm | 3900 nm |
| Optical power / pulse energy | 50~800 mW | 1~200 mW | 1~300 mW |
| Operating mode / pulse width | CW | CW | CW |
| Beam quality | <11 | <5 | Near TEM00 |
Compare the MIL-W-3900 with nearby cw lasers across the wavelength range.
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