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Power stability, linewidth, beam quality

MRL-FN-639-H639 nm red CW laser

639 nm

MRL-FN-639-H is a 639 nm CW laser. Used for collimation, laser medical treatment, scientific experiment, optical instrument. High Stability Red Laser. Key specifications: output / average power 1.8~3 W. View specifications, datasheet and enquiry options from Precisometer.

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Specifications

MRL-FN-639-H

2 specification rows

Wavelength639 nm
Output / average power1.8~3 W
Beam / notesHigh Stability Red Laser

Application context

Why this design is used

Applications named on this model’s datasheet, expanded with the model’s optical specifications.

Collimation

MRL-FN-639-H: Collimation benefits from a stable, focusable source. 639 nm emission fixes the compatible coatings and detector response, while M², divergence and pointing stability should be confirmed for the intended beam path.

Laser medical treatment

MRL-FN-639-H: 639 nm emission determines compatible optics, coatings and detectors for Laser medical treatment. Beam quality, divergence and pointing stability should be checked against the experiment geometry.

Scientific experiment

MRL-FN-639-H: 639 nm emission determines compatible optics, coatings and detectors for Scientific experiment. Beam quality, divergence and pointing stability should be checked against the experiment geometry.

Optical instrument

MRL-FN-639-H: 639 nm emission determines compatible optics, coatings and detectors for Optical instrument. Beam quality, divergence and pointing stability should be checked against the experiment geometry.

Need this configured?

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.

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Model selection

Nearby series comparison

Compare MRL-FN-639-H with the closest available models in the CW Lasers family. Confirm option-dependent values on the final configuration before ordering.

Selection parameterMRL-FN-639-H (current)MSL-FN-639MSL-R-639
Wavelength639 nm639 nm639 nm
Optical power / pulse energy1.8~3 W1~650 mW650~3000 mW
Operating mode / pulse widthConfirm for this modelCWCW
Beam qualityConfirm for this modelTEM00TEM00

Related cw lasers

Compare the MRL-FN-639-H 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.

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

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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.

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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.

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