SLM, narrow linewidth, coherence
MSL-III-660L is a 660 nm Single-Frequency laser. Used for raman spectroscopy, speckle interferometry, bio-instrumentation, metrology. M²: <1.5. Key specifications: output / average power 1~40 mW, spectral linewidth <50 MHz optional, optical noise <0.5%. View specifications, datasheet and enquiry options from Precisometer.
Specifications
20 specification rows
| Output / average power | 1~40 mW |
|---|---|
| Spectral linewidth | <50 MHz optional |
| Optical noise | <0.5% |
| M² | <1.5 |
| Operating mode | CW |
| Power stability (rms, 4 hours ± 3°C) | <2%, <1%, <0.5% |
| Beam divergence, full angle (mrad) | <1.2 |
| Warm-up time (minutes) | <5 |
| Operating temperature (℃) | 10-35 |
| Power supply (100-240VAC) | PSU-III-FDA |
| Expected lifetime (hours) | >10000 |
| Central wavelength (nm) | 660±0.5 |
| Output power (mW) | 1-40 |
| Transverse mode | Near TEM00 |
| Longitudinal mode | Single |
| Coherent length (m) | >2 |
| Noise of amplitude (rms, 20Hz-20MHz) | <1%, <0.5% |
| Beam diameter at the aperture (1/e2, mm) | <3 |
| Polarization ratio | >50:1, (>100:1 optional) Horizontal±5 degree (Vertical optional) |
| Beam height from base plate (mm) | 24.8 |
Application context
Applications named on this model’s datasheet, expanded with the model’s optical specifications.
MSL-III-660L: 660 nm emission sets the excitation and detector-band choice for Raman spectroscopy; linewidth and wavelength stability determine how cleanly weak spectral features can be separated from the laser line. The listed beam characteristic (<1.5) also controls focusing and collection geometry.
MSL-III-660L: Speckle interferometry benefits from a stable, focusable source. 660 nm emission fixes the compatible coatings and detector response, while the listed beam characteristic (<1.5) informs waist size and propagation.
MSL-III-660L: 660 nm emission determines compatible optics, coatings and detectors for Bio-instrumentation. The catalogued beam parameter (<1.5) helps predict how the source will focus and propagate through the instrument.
MSL-III-660L: 660 nm emission determines compatible optics, coatings and detectors for Metrology. The catalogued beam parameter (<1.5) helps predict how the source will focus and propagate through the instrument.
System integration
Use these checks to connect MSL-III-660L to the surrounding optical, mechanical and control system. Every value shown is taken from this model's own specification record.
Technical FAQ
Operating temperature (℃): 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: <1.5 · Beam divergence, full angle (mrad): <1.2. 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-III-660L with the closest available models in the Single-Frequency Lasers family. Confirm option-dependent values on the final configuration before ordering.
Compare the MSL-III-660L 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