Free-space, SM, MM, microscope combiners

YL-I-638/450638 nm red multi-wavelength laser

638 nm

The YL-I-638/450 is a 638 nm laser module. The optical head packages the light source for integration into an instrument. Its specified driver and cooling arrangement determine how the module is powered and stabilized. Waste heat is removed through the specified mounting or cooling interface.

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Specifications

YL-I-638/450

2 specification rows

Wavelength	638 nm
Output / average power	6 W
Beam / notes	Red YL Multi-wavelength Laser Module

What do you need?

The full datasheet for this model is on request. Tell us the output power, beam quality and beam delivery you need, and we'll reply with the matching configuration and lead time.

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Model selection

Nearby series comparison

Compare YL-I-638/450 with the closest available models in the Multi-wavelength Lasers family.

Selection parameter	YL-I-638/450 (current)	YL-I-638/525	YL-I-638/525/450
Wavelength	638 nm	638 nm	638 nm
Optical power / pulse energy	6 W	2.9 W	11 W

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Compare the YL-I-638/450 with nearby multi-wavelength 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.