Power stability, linewidth, beam quality
TEM-FN-642642 nm red CW laser
642 nmThe TEM-FN-642 is a 642 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
TEM-FN-642
18 specification rows
| Output / average power | 1~180 mW |
|---|---|
| Beam / notes | TEM 00 |
| Operating mode | CW |
| Power stability (rms, over 4 hours) | <2%, <1%, <0.5% |
| M2 factor | <1.1 |
| Beam divergence, full angle (mrad) | <1.5 |
| Warm-up time (minutes) | <5 |
| Operating temperature (℃) | 25+/-3 |
| Power supply (85-264VAC) | PSU-III-LED / PSU-III-FDA |
| TTL / Analog modulation | TTL or Analog with 1Hz-1kHz 1kHz-10kHz, 10kHz-30kHz optional |
| Expected lifetime (hours) | 10000 |
| Warranty | 1 year |
| Central wavelength (nm) | 642±10 |
| Transverse mode | TEM00 |
| Ellipticity | >0.95 |
| M² | <1.1 |
| Beam diameter at the aperture (1/e2,mm) | ~1.0 |
| Beam height from base plate (mm) | 25 |
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Model selection
Nearby series comparison
Compare TEM-FN-642 with the closest available models in the CW Lasers family.
| Selection parameter | TEM-FN-642 (current) | MDL-C-642 | TEM-LN-642 |
|---|---|---|---|
| Wavelength | 642 nm | 642 nm | 642 nm |
| Optical power / pulse energy | 1~180 mW | 1~50 mW | 1~100 mW |
| Operating mode / pulse width | CW | — | CW |
| Beam quality | <1.1 | — | <1.1 |
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