

HELIOS IR — Mid-IR Femtosecond Transient Absorption Spectrometer
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HELIOS IR is a broadband mid-infrared pump-probe femtosecond Transient Absorption Spectrometer. A complete turnkey system, it can measure photoinduced absorbance changes across a broad (2-13 µm) spectral range with femtosecond time resolution over an 8 ns time window. With an EOS IR add-on, the HELIOS IR time window can be extended to sub-milliseconds at any time.
Key Features
- Automated alignment of the optical delay line.
- Supports computer-controlled translating sample holder.
- Supports pump beam shutter.
- Supports motorized filter wheel for automated pump intensity control.
- Saves every individual kinetic scan, so if the experiment is aborted (due to laser fluctuations, power outages, etc.) all previous scans are not lost.
- Threshold adjusted automatic probe intensity spike rejection – an advanced setting that collects data points again if the probe is not stable.
- Support for multiple choppers to facilitate customized experiments.
- API (Application Programming Interface) for EOS IR is provided for further experiment customization and integration with external applications.
| Models | Specification |
|---|---|
| Type | Mid-IR femtosecond transient absorption spectrometer |
| Time window | 8 ns |
| Resolution | 2.8 fs |
| Max. speed | >10 ns/s |
| Acceleration | > 260 ns/s 2 |
| Automated alignment time | 3-5 min |
| Beam pointing drift | <10 µm over 8 ns delay range |
Source: Ultrafast Systems manufacturer datasheet. Download the brochure (PDF) from the Documents tab for full details.
Product Family: Transient Absorption Spectrometers (4 variants)
| Product | SKU | Size | Clear Aperture | Operating Wavelength | |
|---|---|---|---|---|---|
| KRONOS — Educational Microsecond Flash Photolysis Spectrometer |
| — | — | — | Contact |
| HELIOS IR — Mid-IR Femtosecond Transient Absorption Spectrometer Current |
| — | — | — | |
| EOS — Nanosecond Transient Absorption Spectrometer |
| — | — | — | Contact |
| HELIOS — Femtosecond Transient Absorption Spectrometer |
| — | — | — | Contact |

