Power stability, linewidth, beam quality

TUN-W-2600~44103900 nm infrared tunable CW laser

3900 nm

The TUN-W-2600~4410 is a 3900 nm continuous-wave diode-pumped solid-state laser. Laser diodes optically pump a solid gain medium inside a resonator. The pump supplies the energy; repeated passes through the gain medium amplify the laser light. Tuning changes the selected output wavelength so spectral features can be scanned with the same source. The tuning band specifies which lines can be reached; linewidth describes the width of the selected line.

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Specifications

TUN-W-2600~4410

9 specification rows

Wavelength	3900 nm
Output / average power	50~800 mW
Beam / notes	Tunable Mid-Infrared Laser
Operating mode	CW
Power stability (rms, 4 hours±3℃)	<5%, <3%
Beam divergence, full angle (mrad)	<11
Cooled method	Air Cooled
Operating temperature (℃)	15-35
Power supply (100-240VAC)	RAD1PS
Expected lifetime (hours)	>10000

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Model selection

Nearby series comparison

Compare TUN-W-2600~4410 with the closest available models in the CW Lasers family.

Selection parameter	TUN-W-2600~4410 (current)	TUN-W-2600~4410	TUN-W-2600~4410
Wavelength	3900 nm	2600 nm	2700 nm
Optical power / pulse energy	50~800 mW	250~1000 mW	250~1000 mW
Operating mode / pulse width	CW	CW	CW
Beam quality	<11	<11	<11

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Compare the TUN-W-2600~4410 with nearby cw lasers across the wavelength range.

Choosing a laser

Guides that put this laser in context

Which specifications decide the experiment, and which ones cost money without changing the result.

Laser emission spectrum, intensity noise traces, and beam quality profiles illustrating the main laser specifications

13 min Spec lab

Laser specifications decoded

Linewidth, spectral width, RIN, M², and coherence length answer five different questions. Translate each into the units your experiment is designed in — and learn which ones not to pay for.

Low-noise laser head and controller of the type specified for optical trapping

Optical trapping

16 min 2 simulations

Choosing a laser for optical tweezers

Why wavelength is decided by photodamage, focal heating, and detector bandwidth rather than trapping force — and what laser noise costs you in piconewtons.

Fluorescently labeled cells in a sharp confocal focal plane

Confocal microscopy

14 min Design lab

Designing a confocal fluorescence excitation system

Connect fluorophores, pinhole size, Airy units, spatial sampling, scan timing, modulation, and power after the fiber in one practical design workflow.