Power stability, linewidth, beam quality

FC-690690 nm red CW laser

690 nm

The FC-690 is a precision 690 nm CW laser delivering 1~3 W output power. View technical specifications and request the full datasheet from Precisometer.

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Specifications

FC-690

2 specification rows

Wavelength	690 nm
Output / average power	1~3 W
Beam / notes	OEM Red Laser Module

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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 FC-690 with the closest available models in the CW Lasers family.

Selection parameter	FC-690 (current)	FC-D-690	MLL-III-690L
Wavelength	690 nm	690 nm	690 nm
Optical power / pulse energy	1~3 W	1~450 mW	1~250 mW

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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.