Fiber output, PM options, seed formats
MDL-III-685L685 nm red fiber laser
685 nmThe MDL-III-685L 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. The TTL and analog modulation options control different things: TTL gates the beam on and off, while analog control varies its intensity. Modulation bandwidth sets how quickly the source can follow a changing command.
Specifications
MDL-III-685L
18 specification rows
| Output / average power | 1~50 mW |
|---|---|
| Beam / notes | Fiber output laser High Stability 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 |
| Transverse mode | Near TEM00 |
| M² | <1.5 |
| Beam diameter at the aperture (1/e2, mm) | ~3.5 |
| Polarization ratio | >50:1, (>100:1 optional) Horizontal±5 degree (Vertical optional) |
| Beam height from base plate (mm) | 24.8 |
| Modulation option | DC-1kHz, 1kHz-10kHz, 10kHz-30kHz, 30kHz-100kHz optional; TTL and Analog optional |
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Model selection
Nearby series comparison
Compare MDL-III-685L with the closest available models in the Fiber Lasers family.
| Selection parameter | MDL-III-685L (current) | TEM-F-685 | MDL-III-685-SM |
|---|---|---|---|
| Wavelength | 685 nm | 685 nm | 685 nm |
| Optical power / pulse energy | 1~50 mW | 1~20 mW | 1~20 mW |
| Operating mode / pulse width | CW | CW | — |
| Beam quality | <1.5 | <1.1 | — |
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