The driver has a fast nanoseconds rise and fall times, variable pulse gate width from 7ns to ns with output voltages up to 9KV. The optimum choice will depend on your application, so give us a call to discuss your needs. Many of the pulse generator manufactured by Kentech are suitable for driving pockels cells. Through terminated systems tend to be faster but require more pulser power. In pulsed systems this effect is simply overcome by increasing the amplitude of the applied pulse to greater than that required for DC induced retardation. For various reasons see below , it is often necessary to pick certain pulses from such a pulse train, i.
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Although pulses in mode locked trains are typically sub ps the gate used for pulse picking is generally nearer the two round trip times.
DQ High Repetition Rate Pockels Cell Driver for Q-Switching | Eksma Optics
This can offer improved extinction ratio without the cost ppockels a second driver. Our technical expertise is by no means limited to this list of products. Pockels cells are used for many applications mainly within laser systems. Through terminated systems tend to be faster but require more pulser power.
HV pulse amplitude up to 4 kV DQ Series high repetition rate Pockels cell driver has been designed for use in mode-locked lasers for cavity dumping or for cavity Q-switching of solid-state nanosecond lasers.
It is suitable for single pulse selection from train of femtosecond or picosecond pulses. Whilst extremely effective devices, there are some applications where transverse field devices are superior choices. Fast rise times systems for Regenerative amplifiers. In this case both pulse trains of cross polarzied beams are required. Transverse driven cells require less drive voltage but exhibit poorer thermal stability and lower extinction ratio.
For example, it may use the signal from a fast photodiodesensing the original pulse train, in order to synchronize the switching with the input pulses. The pulse picker consists of the pockels cell, high voltage driver, synchronization and delay generator.
Choose product Send request for custom product. Ability to operate at high pulse repetition rates makes this driver perfect fit for most of diode-pumped nanosecond lasers. The cell will change the state of polarisation of the laser light and when combined with a polariser will permit the opening or closing of a cavity or cavity dumping or filling. In these cases the driver can simply switch a high voltage to ground or some other level. The peak voltage should be timed to the pulse.
For high repetition rates the driver should be attached to the heatsink with thermal resistance of at least 0. Add items to your cart and request an official quote or order online. For obtaining high pulse energies in ultrashort pulses, it is frequently necessary to reduce the pulse repetition rate. With Intra-cavity chopping the pulse length is set by the difference of cavity round trip time and the length of the gate pulse applied to a pockels cell in the cavity.
Pulse Pickers and Regen Systems. For full-text searches, use our search page. This means that slowly varying uigh pulses can be used and that changes in timing will not greatly affect the transmission of the pulse picker. If the pulse ppockels through the system depletes the gain in the amplifiers it is only necessary to reduce transmission before the pulse.
More complex arrangements may be necessary for regenerative amplifiers where the laser has to be seeded, possibly from a mode locked train so pulse picking may be needed. The voltage required is proportional to the wavelength.
Find more supplier details at the end of the encyclopedia articleor go to our. It combines a pre-aligned quarter wave retardation plate and a thin film Brewster plate polarizer for simple operation. Longitudinally driven cells offer the highest performance but require the highest voltages. Components of a standard pulse picker: This requirement is normally required to stop the build up of Amplified Stimulated Emmision. This system can pick out pulse from pulsed or CW mode-locked lasers, or CW Q-switched mode locked lasers.
Kentech can supply suitable trigger circuits for this purpose. Only one edge of the pulse is important. Extra cavity pulse chopping is not nearly as efficient as intra-cavity pulse shaping or pulse compression by, for example, Brillouin back scatter.