Fast Switched Diode Laser - FSL 500

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.

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