Pulse energy, repetition rate, pulse width
MDL-NS-685685 nm red pulsed laser
685 nmThe MDL-NS-685 is a 685 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
MDL-NS-685
24 specification rows
| Output / average power | 1~20 mW |
|---|---|
| Beam / notes | Nanosecond Pulsed Red Laser |
| Operating mode | CW |
| Power stability (rms, 4 hours ± 3°C) | <2%, <1%, <0.5% |
| M2 | <1.5 |
| Beam divergence, full angle (mrad) | <1.0 |
| Warm-up time (minutes) | <5 |
| Cooled method | Conduction |
| Operating temperature (°C) | 10-35 |
| Power supply (100-240VAC) | PSU-III-FDA/PSU-III-LED/PSU-A-D/PSU-III-OEM |
| Expected lifetime (hours) | >10000 |
| Central wavelength (nm) | 685±5 |
| Peak power (mW) | 1-20 |
| Pulse width (FWHM) | 10ns-10ms |
| Transverse mode | Near TEM00 |
| M² | <1.2 |
| Beam diameter at the aperture (1/e2,mm) | ~1.2 |
| Polarization ratio | >50:1, (>100:1 optional) Horizontal±5 degree (Vertical optional) |
| Rep. rate | DC-20MHz |
| Rise Time (ns) | <4 |
| Fall Time (ns) | <3 |
| Modulation Depth (extinction ratio) | >1000000:1 |
| Beam height from base plate (mm) | 19 |
| Operating voltage (VDC) | 12V/3.34A |
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Model selection
Nearby series comparison
Compare MDL-NS-685 with the closest available models in the Pulsed Lasers family.
| Selection parameter | MDL-NS-685 (current) | PGL-FP-685 | PGL-VI-685 |
|---|---|---|---|
| Wavelength | 685 nm | 685 nm | 685 nm |
| Optical power / pulse energy | 1~20 mW | 1~20 mW | 1~30 mW |
| Operating mode / pulse width | CW | — | CW |
| Beam quality | <1.2 | — | Near TEM00 |
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