SLM, narrow linewidth, coherence
MSL-R-721 is a 721 nm Single-Frequency laser. Used for dna sequencing, cell sorting, spectrum analysis, flow cytometry. M²: <1.3. Key specifications: output / average power 300~1000 mW, spectral linewidth <5 MHz, optical noise <0.5%. View specifications, datasheet and enquiry options from Precisometer.
Specifications
20 specification rows
| Wavelength | 721 nm |
|---|---|
| Output / average power | 300~1000 mW |
| Spectral linewidth | <5 MHz |
| Optical noise | <0.5% |
| M² | <1.3 |
| Operating mode | CW |
| Power stability (rms, 4 hours, ±3°C) | <3%, <2%, <1% |
| Transverse mode | TEM00 |
| Longitudinal mode | Single |
| Beam diameter at the aperture (1/e2, mm) | ~1.5 |
| Polarization ratio | >100:1, Vertical (Horizontal optional) |
| Pointing stability over temperature (μrad/°C) | <8 |
| Cooled method (water cooled) | WCH-580 |
| Operating temperature (°C) | 20-30 |
| Power supply (90-264VAC) | PSU-W-FDA |
| Expected lifetime (hours) | >10000 |
| Noise of amplitude (rms, 20Hz-20MHz) | <0.5% |
| Beam divergence, full angle (mrad) | <1.5 |
| Pointing stability (μrad) (over 2 hours after warm-up and ±3°C) | <50 |
| Coherent length (m) | >50 |
| Warm-up time (minutes) | <15 |
Application context
Typical uses for this laser type, with the selection logic tied to the model record.
MSL-R-721: 721 nm emission can be matched to the absorption or excitation band used in DNA sequencing. The stated stability or noise figure (<0.5%) helps keep measured intensity changes attributable to the sample rather than source drift.
MSL-R-721: 721 nm emission determines compatible optics, coatings and detectors for Cell sorting. The catalogued beam parameter (<1.3) helps predict how the source will focus and propagate through the instrument.
MSL-R-721: 721 nm emission sets the excitation and detector-band choice for Spectrum analysis; linewidth and wavelength stability determine how cleanly weak spectral features can be separated from the laser line. The listed beam characteristic (<1.3) also controls focusing and collection geometry.
MSL-R-721: 721 nm emission can be matched to the absorption or excitation band used in Flow cytometry. The stated stability or noise figure (<0.5%) helps keep measured intensity changes attributable to the sample rather than source drift.
System integration
Use these checks to connect MSL-R-721 to the surrounding optical, mechanical and control system. Every value shown is taken from this model's own specification record.
Technical FAQ
Cooled method (water cooled): WCH-580 · Operating temperature (°C): 20-30. Provide the stated cooling method and keep the laser-head base thermally coupled; temperature drift moves wavelength, output power and beam pointing.
M²: <1.3 · Transverse mode: TEM00. Size the downstream optics from the stated beam diameter and divergence rather than from the aperture of the housing, and confirm the polarisation state before specifying isolators or polarising optics.
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 MSL-R-721 with the closest available models in the Single-Frequency Lasers family. Confirm option-dependent values on the final configuration before ordering.
| Selection parameter | MSL-R-721 (current) | 721 | MSL-FN-720 |
|---|---|---|---|
| Wavelength | 721 nm | 721 nm | 720 nm |
| Optical power / pulse energy | 300~1000 mW | 1~300 mW | 1~100 mW |
| Operating mode / pulse width | CW | Confirm for this model | Confirm for this model |
| Beam quality | <1.3 | <1.2 | Confirm for this model |
Compare the MSL-R-721 with nearby single-frequency lasers across the wavelength range.
Choosing a laser
Which specifications decide the experiment, and which ones cost money without changing the result.
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