Power stability, linewidth, beam quality
MSL-DU-639-W639 nm red CW laser
639 nmThe MSL-DU-639-W is a 639 nm continuous-wave laser source. Single-longitudinal-mode operation selects one resonator frequency. Linewidth describes the spread around that frequency, while frequency drift describes how its center moves over time. This distinction matters when matching the source to a narrow resonance or an interferometer.
Specifications
MSL-DU-639-W
23 specification rows
| Output / average power | 1~750 mW |
|---|---|
| Beam / notes | Water cooled, f requency stabilized |
| Operating mode | CW |
| Power stability (rms, 4 hours, ±3°C) | <3%, <2%, <1% |
| Transverse mode | TEM00 |
| Longitudinal mode | Single |
| Spectral line width (MHz) | <1MHz |
| Noise of amplitude (rms, 20Hz-20MHz) | <1%, <0.5% |
| Beam divergence (mrad) | <1.5 |
| Polarization ratio | >100:1, Horizontal (Vertical optional) |
| Pointing stability over temperature (urad/°C) | <8 |
| Warm-up time (minutes) | <30 |
| Cooled method (water cooled) | WCH-580 |
| Operating temperature (°C) | 10-35 |
| Power supply (100-240VAC) | PSU-SR |
| Expected lifetime (hours) | >10000 |
| Wavelength (nm) | 639±1 |
| Coherent length (m) | >40 |
| Frequency shift (MHz) (over ±2°C and 8hrs) (optional) | <±100 MHz (±0.15pm) |
| M² | <1.2 |
| Beam diameter at the aperture (1/e2, mm) | <1.5 |
| Pointing stability (urad) (over 2 hours after warm-up and ±3°C) | <50 |
| Beam height from base plate (mm) | 47.4 |
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Model selection
Nearby series comparison
Compare MSL-DU-639-W with the closest available models in the CW Lasers family.
| Selection parameter | MSL-DU-639-W (current) | MSL-DU-639-W | MSL-FN-639 |
|---|---|---|---|
| Wavelength | 639 nm | 639 nm | 639 nm |
| Optical power / pulse energy | 1~750 mW | 1~750 mW | 1~650 mW |
| Operating mode / pulse width | CW | CW | CW |
| Beam quality | <1.2 | <1.2 | <1.2,<1.1 |
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