Power stability, linewidth, beam quality
YL-I-638 is a 638 nm CW laser. Used for flow cytometry, dna sequencing, medical imaging, collimation. Ultra compact, medical treatment. Key specifications: output / average power 1~40 W, fiber core diameter (um) 200, 400, 600, 0.22NA, fiber connector SMA905, FC/PC optional. View specifications, datasheet and enquiry options from Precisometer.
Specifications
13 specification rows
| Wavelength | 638 nm |
|---|---|
| Output / average power | 1~40 W |
| Beam / notes | Ultra compact, medical treatment |
| Fiber Core Diameter (um) | 200, 400, 600, 0.22NA |
| Fiber Connector | SMA905, FC/PC optional |
| Fiber lengths | 1m |
| Fiber Jacket | PVC, Metal optional |
| Power stability (rms, 4 hours±3℃) | <2%, <1% |
| customers’ equipment. Cooled method | Air cooled |
| Storage temperature (℃) | -20-50 |
| Modulation option | DC-1kHz, 1kHz-10kHz, 10kHz-30kHz optional; TTL and Analog optional |
| Expected lifetime (hours) | >10000 |
| Cooled method | Air cooled |
| Operation temperature (℃) | 15-35 |
Application context
Typical uses for this laser type, with the selection logic tied to the model record.
YL-I-638: 638 nm emission can be matched to the absorption or excitation band used in Flow cytometry. The stated stability or noise figure (<2%, <1%) helps keep measured intensity changes attributable to the sample rather than source drift.
YL-I-638: 638 nm emission can be matched to the absorption or excitation band used in DNA sequencing. The stated stability or noise figure (<2%, <1%) helps keep measured intensity changes attributable to the sample rather than source drift.
YL-I-638: 638 nm emission can be matched to the absorption or excitation band used in Medical imaging. The stated stability or noise figure (<2%, <1%) helps keep measured intensity changes attributable to the sample rather than source drift.
YL-I-638: Collimation benefits from a stable, focusable source. 638 nm emission fixes the compatible coatings and detector response, while M², divergence and pointing stability should be confirmed for the intended beam path.
System integration
Use these checks to connect YL-I-638 to the surrounding optical, mechanical and control system. Every value shown is taken from this model's own specification record.
Technical FAQ
Fiber Core Diameter (um): 200, 400, 600, 0.22NA · Fiber Connector: SMA905, FC/PC optional. Match the listed connector and fiber mode exactly; SMA905, FC/PC and FC/APC are not interchangeable, and a single-mode launch requires mode-field as well as numerical-aperture matching.
customers’ equipment. Cooled method: Air cooled · Cooled method: Air cooled. Provide the stated cooling method and keep the laser-head base thermally coupled; temperature drift moves wavelength, output power and beam pointing.
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.
Model selection
Compare YL-I-638 with the closest available models in the CW Lasers family. Confirm option-dependent values on the final configuration before ordering.
| Selection parameter | YL-I-638 (current) | LDM-638-10-2 | LDM-638-20-2 |
|---|---|---|---|
| Wavelength | 638 nm | 638 nm | 638 nm |
| Optical power / pulse energy | 1~40 W | 10 W | 20 W |
| Operating mode / pulse width | Confirm for this model | Confirm for this model | Confirm for this model |
| Beam quality | Confirm for this model | Confirm for this model | Confirm for this model |
Compare the YL-I-638 with nearby cw lasers across the wavelength range.
Choosing a laser
Which specifications decide the experiment, and which ones cost money without changing the result.
PhotonicsLinewidth, 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.
Open guide
Optical trappingWhy 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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Confocal microscopyConnect fluorophores, pinhole size, Airy units, spatial sampling, scan timing, modulation, and power after the fiber in one practical design workflow.
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