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Power stability, linewidth, beam quality

LDM-638-40-4638 nm red high-power CW laser

638 nm

LDM-638-40-4 is a 638 nm CW laser. Used for flow cytometry, dna sequencing, medical imaging, collimation. Fiber Core Diameter (um): 400. Key specifications: output / average power 40 W. View specifications, datasheet and enquiry options from Precisometer.

Datasheet (PDF)Back to CW Lasers

Specifications

LDM-638-40-4

2 specification rows

Wavelength638 nm
Output / average power40 W
Beam / notesFiber Core Diameter (um): 400

Applications

Typical uses for lasers of this wavelength and type in this catalogue.

  • Flow cytometry
  • DNA sequencing
  • Medical imaging
  • Collimation
  • Laser medical treatment

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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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Compare the LDM-638-40-4 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.

All guides
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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