SLM, narrow linewidth, coherence
MSL-DU-639-W is a 639 nm Single-Frequency laser. Used for optical frequency standards, gravitational wave detection, tests of fundamental physics, atomic clocks. M²: <1.2. Key specifications: output / average power 1~750 mW, spectral linewidth <1 MHz, optical noise <0.5%. View specifications, datasheet and enquiry options from Precisometer.
Specifications
24 specification rows
| Output / average power | 1~750 mW |
|---|---|
| Spectral linewidth | <1 MHz |
| Optical noise | <0.5% |
| M² | <1.2 |
| Operating mode | CW |
| Power stability (rms, 4 hours, ±3°C) | <3%, <2%, <1% |
| Transverse mode | TEM00 |
| Longitudinal mode | Single |
| 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 |
| Output power (mW) | 1-750 |
| Coherent length (m) | >40 |
| Frequency shift (MHz) (over ±2°C and 8hrs) (optional) | <±100 MHz (±0.15pm) |
| Noise of amplitude (rms, 20Hz-20MHz) | <1%, <0.5% |
| 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 |
Application context
Applications named on this model’s datasheet, expanded with the model’s optical specifications.
MSL-DU-639-W: 639 nm emission determines compatible optics, coatings and detectors for Optical frequency standards. The catalogued beam parameter (<1.2) helps predict how the source will focus and propagate through the instrument.
MSL-DU-639-W: 639 nm emission determines compatible optics, coatings and detectors for Gravitational wave detection. The catalogued beam parameter (<1.2) helps predict how the source will focus and propagate through the instrument.
MSL-DU-639-W: Tests of fundamental physics benefits from a stable, focusable source. 639 nm emission fixes the compatible coatings and detector response, while the listed beam characteristic (<1.2) informs waist size and propagation.
MSL-DU-639-W: 639 nm emission determines compatible optics, coatings and detectors for Atomic clocks. The catalogued beam parameter (<1.2) helps predict how the source will focus and propagate through the instrument.
System integration
Use these checks to connect MSL-DU-639-W 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): 10-35. Provide the stated cooling method and keep the laser-head base thermally coupled; temperature drift moves wavelength, output power and beam pointing.
M²: <1.2 · 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-DU-639-W with the closest available models in the Single-Frequency Lasers family. Confirm option-dependent values on the final configuration before ordering.
Compare the MSL-DU-639-W 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.
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
PhotonicsSingle-mode fiber does not preserve polarization. Pin the state, erase it with a scrambler, or maintain it in PM fiber — which one your measurement needs, and the response time and extinction ratio that decide it.
Open guide