HELIOS is an automatic femtosecond transient absorption spectrometer produced by Ultrafast Systes in the United States. It can be matched with various amplified femtosecond lasers, including high-energy titanium sapphire amplifiers and high repetition rate ytterbium amplifiers. The design of HELIOS differs from traditional manual pump detection systems, greatly enhancing the experimental experience for researchers.
System features:
● Wider detection spectral range
Spectral resolution optimized for transient absorption
● 8ns time window, expandable to ms
The nanosecond window is achieved through the use of direct drive high-speed optical delay lines. The delay line optical device adopts a custom designed bracket to improve the reproducibility and overall reliability of beam alignment. This type of delay line has the characteristics of high resolution and high speed. High speed scanning is crucial as it allows for pseudo-random stepping without significantly increasing experimental time. This type of stepping is very useful for minimizing the effects of laser instability and sample degradation.
Using EOS add ons, the standard 8 ns time window can be extended to milliseconds.
● Optical delay line parameters:
● Time window of 8ns
Resolution: 14fs
Minimum step size: 2.8fs
Maximum speed: 10ns/s
● Automatic calibration time: 3-5 minutes
● Light drift:< 10um
The biggest feature of HELIOS is its level of automation, which ensures the stability of system signals and reduces the annoyance of frequent signal loss for users.
● Can achieve automated optical delay line correction
● Automatically switch spectral range (UV/VIS/NIR/SWIR)
● Automatic pump light calibration
Helios' linear array detectors are coupled with spectrometers using optical fibers
