Time-resolved fluorescence measurements require a source of repetitive optical pulses to excite the sample under investigation. The pulse characteristics required (for example wavelength, pulse duration and pulse energy) depend on the sample and also on the method of data acquisition. In general the following characteristics are desirable -
- Good temporal stability (minimal drift).
- Multiple output wavelengths, easily selectable.
- Clean, reproducible pulse shape - performance should always be compared using logarithmic data.
- Good intensity stability (especially important for depolarization measurements).
- Easy synchronization.
- Low radio frequency (RF) emission.
HORIBA Jobin Yvon IBH is the only company manufacturing pulsed sources based on laser diodes, LEDs, and flashlamps.
A novel range of interchangeable sources based on LEDs and laser diodes producing pulse durations of 50ps to 2ns between 370nm and 660nm.
Visually identical to our award-winning NanoLEDs, and available at the same wavelengths, SpectraLEDs emit longer pulse (µs to seconds) and are ideal for phosphorescence measurements.
The original and highly successful coaxial nanosecond flashlamp. This workhorse produces nanosecond pulses from the vacuum-UV to the NIR and is now in its fourth generation.
A sub-microsecond xenon flashlamp featuring optical synchronization, low noise operation, and a 300Hz repetition rate. Ideal as an excitation source for phosphorescence lifetime measurements.
