Spectrum Analyzers & Performance Monitors
Kinetic spectrometer with nanosecond time resolution
- Broad probe spectral range (170 – 2100nm)
- Probe beam reference for increased signal-to-noise ratio
- Collinear pump-probe orientation
- Small probe focal spot on the sample (~1 mm)
- Supports multi-kHz lasers
- User-friendly data acquisition and processing software
DescriptionPROTEUS Kinetic spectrometer with nanosecond time resolution
PROTEUS is a complete turnkey nanosecond flash photolysis instrument with extensive spectral and temporal coverage. This spectrometer comprises an optical unit, electronics rack, and a laptop PC containing all necessary data acquisition and data analysis software. PROTEUS is designed to work with a variety of lasers, including amplified femtosecond and Q-switched nanosecond lasers to monitor photoinduced absorption and emission changes.
Nanosecond flash photolysis requires a probe light source capable of providing extremely high brightness across a broad wavelength range. Traditionally, multiple lamps (Tungsten/Halogen, Xenon-arc, Deuterium) have been used to cover this broad spectral range. These incoherent sources require large reflectors and lenses to collimate the lamp output and the focal point is necessarily bigger than coherent (laser) and fiber coupled light sources. This, in turn, put a minimum requirement on the excitation laser spot size in the sample – it had to be at least the size of the probe so the probe samples the entire photoexcited region. Therefore in order to excite enough molecules and achieve a sufficient transient absorption signal amplitude researchers had to use millijoule excitation energy laser pulses. This limited the selection of the excitation lasers suitable for this type of experiments to high power low repetition rate Q-switched nanosecond lasers. This high pump power requirement can lead to rapid sample degradation and the low repetition rate necessitates longer averaging times due to the low duty cycle of the experiment.
Ultrafast Systems’ Proteus spectrometer utilizes a new type of a broadband high brightness light source whose output can be focused into a few hundred micron spot. This eliminates the need for high-energy Q-switched lasers. Since the Proteus spectrometer requires only a few microjoules of excitation energy it can be used with a variety of lasers including high repetition rate nanosecond and femtosecond lasers. This leads to faster data collection and minimizes sample degradation caused by a pump laser.
- Cell biology
- Materials science
- Transient spectrometry