SLM, narrow linewidth, coherence
TUN-841~856845 nm near-infrared tunable single-frequency laser
845 nmThe TUN-841~856 is a 845 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-841~856
20 specification rows
| Wavelength | 845 nm |
|---|---|
| Output / average power | 1~40 mW |
| Beam / notes | Narrow Linewidth Infrared Laser |
| Operating mode | CW |
| Power stability (rms, 4 hours ± 3°C) | <3%, <2%, <1% |
| Transverse mode | Near TEM00 |
| Beam divergence, full angle (mrad) | <1.0 |
| Warm-up time (minutes) | <5 |
| Operating temperature (℃) | 20-30 |
| Power supply (100-240VAC) | PSU-TUN |
| Parameters of customed power supply | TEC: 7-12kΩ |
| Expected lifetime (hours) | >10000 |
| Wavelength range of roughly tuning (nm) | 841-856 |
| 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) | >30 (75pm) |
| Fine tuning accuracy (nm) | 0.001 |
| Beam diameter at the aperture (1/e2, mm) | ~3.0 |
| Polarization ratio | >50:1, (>100:1 optional) Horizontal±5 degree |
| Beam height from base plate (mm) | 40 |
What do you need?
Tell us the output power, linewidth and beam delivery you need, and we'll reply with the matching configuration and lead time.
Model selection
Nearby series comparison
Compare TUN-841~856 with the closest available models in the Single-Frequency Lasers family.
| Selection parameter | TUN-841~856 (current) | MDL-III-845L | 852 |
|---|---|---|---|
| Wavelength | 845 nm | 845 nm | 852 nm |
| Optical power / pulse energy | 1~40 mW | 1-30 | 1~120 mW |
| Operating mode / pulse width | CW | CW | — |
| Beam quality | Near TEM00 | <1.5 | <1.5 |
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