Fast Switched Diode Laser FSL 500 
Features Pulse width adjustable between 3 ns and 100 ns
  Ultra short rise/fall time down to 0.3 ns / 0.8 ns
  User-defined signal patterns via external triggering
  Laser heads for wavelengths from 375 nm to 1550 nm
  Repetition rate from single shot to 12 MHz
  Completely switched off between pulses
  'On' power level adjustable between 30 % and full power
Applications Time-response characterization of opto-electronic devices
  Semiconductor device testing
  Printing industry (computer-to-plate technology CTP)
  Optical data storage
  Direct photo lithography
  Luminescence Excitation
A Brief Description

new Laser heads for the FSL 500 at 470 nm and 485 nm are now available.

The FSL 500 consists of a common control unit and interchangeable laser heads. The control unit contains the power supply, an internal pulse rate generator and a driver stage that allows to control the duration of the laser pulse regardless of the selected amplitude. The driver stage can be operated in three basic modes: internal, slope and level triggered. In both, internal and slope triggered mode the pulse width is controlled by the front panel settings. In the internal mode the driver operates at a base frequency of 12 MHz, which is manually dividable by 2 and 4, and provides an adjustable laser-on duration up to 100 ns. In the slope triggered mode the laser pulse is fired by the falling edge of an external electrical input signal. In the level trigger mode the optical output follows an arbitrary signal pattern of a trigger input, provided that there is an off-time larger than 20 ns between two pulses.
It is possible to select a lower laser pulse amplitude reduced to 30 % of the maximum power. Laser heads are available with wavelengths from 370 nm up to 1550 nm. Since the laser diode is the critical element, the rise-time, fall-time and overshoot are wavelength dependent. The table in the specifications page shows typical values for the available wavelengths.
The laser heads come with collimator optics and peltier cooling and can be fitted to single mode or multi mode optical fibres. 
Specifications: FSL 500 driver specifications
  FSL 500 laser heads
Download the datasheet
Measurement Examples: Low-cost, frequency-domain, fluorescence lifetime confocal microscopy, M.J. Booth., University of Oxford
  Please see our bibliography for many other application examples
  Brochure about all PicoQuant lasers available for download.
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