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LP980 pump-probe spectrometer

The LP980 from renowned manufacturer Edinburgh Instruments is a modular spectrometer for measuring transient absorption on time scales from nanoseconds to milliseconds. It uses a pump-probe excitation method to study the dynamics of photoinduced processes, with the probe beam source being a broad-spectrum Xe lamp operating in continuous or pulsed mode. This type of pump-probe spectroscopy is referred to as laser flash photolysis.

Key features

All-in-One spectrometer for measurement of transient absorption, laser-induced fluorescence and phosphorescence and time-resolved TA spectra
Dual sample chamber allowing for changing the geometry of the excitation and probe beam (perpendicular, quasi-collinear and diffuse arrangements)
Sensitivity ΔOD 0.002 (kinetic mode with photomultiplier tube) and ΔOD 0.0005 (spectral mode with ICCD)
Powerful monochromator with a focal length of 325 mm
Option to extend the instrument with an InGaAs detector for transient absorption measurements up to 2.55 µm
Probing with a stable 150 W xenon lamp
Single software package for all measurements and analysis of measured data

EDINBURGH INSTRUMENTS

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Spectroscopy

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Parameters

The LP980 can operate in two basic modes:

Kinetic mode - LP980-K records the transient absorption waveform at a selected wavelength, while time-resolved absorption spectra can be obtained by scanning over the selected spectral range (a photomultiplier is used for detection as standard).
Combined (kinetic + spectral) mode - LP980-KS allows direct recording of time-resolved TA spectra in addition to transient absorption lifetime measurements (the detection system includes a photomultiplier and ICCD camera)

In addition to transient absorption (TA) and time-resolved TA spectra, the LP980 can also measure laser-induced fluorescence and phosphorescence.

LP980 - Basic Configuration
Monochromator/Spectrograph	Czerny-Turner design with rotatable head for up to 3 diffraction gratings
	Focal length 325 nm
	Detector selection via computer controlled mirror
	Slits 5 µm to 10 mm (continuously adjustable, motorized)
Compatible excitation laser sources	Q-switched Nd:YAG lasers with output at 1064 nm, 532 nm, 355 nm or 266 nm
	Tunable OPO lasers
Mutual beam position	Perpendicular geometry (standard configuration, suitable for liquid samples)
	Quasi-collinear geometry (preferred for weakly absorbing liquid samples and gases)
	Diffuse reflectance geometry (suitable for powder samples and opaque films)

LP980-K (Kinetic mode)
Grid	Engraved planar grating, 1800 verts/mm, 500 nm blaze
Dispersion	1.66 nm/mm
Spectral Range	200 nm - 870 nm
Spectral resolution	0.1 nm
Sensitivity	ΔOD 0.002 (single shot, PMT)
Detector type	Photomultiplier tube (PMT) with high linearity

LP980-KS (Kinetic & Spectral mode)
Grid	Grating for LP980-K + additional engraved planar grating with 150 vr./mm (500 nm blaze)
Dispersion	19.9 nm/mm
Spectral Interval ICCD	540 nm
Spectral resolution	0.56 nm with ICCD (spectral interval/960 px)
Sensitivity	ΔOD 0.0005 (single shot, ICCD)
Detectors	PMT (LP980-K) + ICCD
Min. gate width	7 ns (FWHM)
Active pixels	960 x 256
Active area	25 mm x 6.7 mm
Cooling	-20°C as standard

LP980 pump-probe spectrometer

Key features

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