Power stability, linewidth, beam quality
TUN-634~643637 nm red tunable CW laser
637 nmThe TUN-634~643 is a 637 nm continuous-wave direct diode laser. Electrical current creates optical gain in a semiconductor junction, and the diode generates the laser light directly. Optical feedback selects the oscillating modes, while drive current and junction temperature affect output power and wavelength. Continuous-wave operation provides a sustained beam for experiments that need steady illumination.
Specifications
TUN-634~643
20 specification rows
| Wavelength | 637 nm |
|---|---|
| Output / average power | Wavelength tunable |
| Beam / notes | Series: TUN-634~643 |
| Wavelength range of roughly tuning (nm) | 634-643 |
| Operating mode | CW |
| Power stability (rms, 4 hours ± 3°C) | <3%, <2%, <1% |
| Transverse mode | Near TEM00 |
| Spectral line width (nm) | <0.1 |
| Frequency shift (pm) (over ±2°C and 1hrs) | <10 |
| Coarse tuning accuracy (nm) | ~0.1 |
| Fine tuning range (GHz) | >40 (60pm) |
| Fine tuning accuracy (nm) | 0.001 |
| Beam diameter at the aperture (1/e2, mm) | ~3.0 |
| Beam divergence, full angle (mrad) | <1.0 |
| Polarization ratio | >50:1, (>100:1 optional) Horizontal±5 degree |
| Warm-up time (minutes) | <5 |
| Beam height from base plate (mm) | 40 |
| Operating temperature (℃) | 20-30 |
| Power supply (100-240VAC) | PSU-TUN |
| Parameters of customed power supply | Current : 0-270mA |
| Expected lifetime (hours) | >10000 |
What do you need?
Tell us the output power, beam quality and beam delivery you need, and we'll reply with the matching configuration and lead time.
Model selection
Nearby series comparison
Compare TUN-634~643 with the closest available models in the CW Lasers family.
| Selection parameter | TUN-634~643 (current) | Long Coherence Length | TUN-628~637 |
|---|---|---|---|
| Wavelength | 637 nm | 637 nm | 637 nm |
| Optical power / pulse energy | Wavelength tunable | 1-50 mW | Wavelength tunable |
| Operating mode / pulse width | CW | — | — |
| Beam quality | Near TEM00 | — | — |
Related cw lasers
Compare the TUN-634~643 with nearby cw lasers across the wavelength range.
