Power stability, linewidth, beam quality
TEM-FN-637637 nm red CW laser
637 nmThe TEM-FN-637 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. 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-637
17 specification rows
| Output / average power | 1-180 mW |
|---|---|
| Beam / notes | Series: TEM-FN-637; Beam mode: TEM00 |
| Operating mode | CW |
| Power stability (rms, 4 hours ± 3°C) | <2%, <1%, <0.5% |
| Transverse mode | TEM00 |
| M2 | <1.1 |
| Beam divergence, full angle (mrad) | <1.5 |
| Warm-up time (minutes) | <5 |
| Operating temperature (°C) | 25±3 |
| Power supply (100-240VAC) | PSU-III-FDA/PSU-III-LED |
| Expected lifetime (hours) | >10000 |
| Central wavelength (nm) | 637±5 |
| Ellipticity | >0.95 |
| M² | <1.1 |
| Beam diameter at the aperture (1/e2, mm) | ~1.0 |
| Beam height from base plate (mm) | 27.4 |
| Modulation option | DC-1kHz, 1kHz-10kHz, 10kHz-30kHz optional; TTL and Analog optional |
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Model selection
Nearby series comparison
Compare TEM-FN-637 with the closest available models in the CW Lasers family.
| Selection parameter | TEM-FN-637 (current) | Long Coherence Length | TUN-628~637 |
|---|---|---|---|
| Wavelength | 637 nm | 637 nm | 637 nm |
| Optical power / pulse energy | 1-180 mW | 1-50 mW | Wavelength tunable |
| Operating mode / pulse width | CW | — | — |
| Beam quality | <1.1 | — | — |
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