Figure 1. Time Diagram of DQF-0.2-5 driver
| Model | DQF-0.2-5D | DQF-0.1-8D |
| Maximum high voltage to cell (HV) pulse amplitude (U1+U2) |
5 kV | 7.5 kV |
| U1 value | equal to HV powering voltage | |
| U2 value | equal to 0.25xU1 | equal to 0.3xU1 |
| HV pulse time fall time (a) | < 15 ns | < 12 ns |
| HV pulse rise time, typical (b) | 60 µs | 120 µs |
| HV pulse duration, typical (c) | 300 µs (1200 µs optionally) | 650 µs |
| HV pulse repetition rate | ≤ 250 Hz | ≤ 100 hz |
| HV pulse delay (d) | 40 ns | 25 ns |
| External triggering pulse duration | 100-1200 µs | 120-650 µs |
| External triggering pulse amplitude | 3-5 V (50 Ω) | 3.5-5 V (50 Ω) |
| External triggering pulse rise & fall time | < 20 ns | < 20 ns |
| Board dimensions | 92 x 70 x 22 mm* | 92 x 70 x 27 mm* |
| Mounting holes location for M3 studs | 84 x 62 mm | 84 x 62 mm |
| External powering requirements: | ||
| DC supply | 12-24 V, max 200 mA | 12 V, max 80 mA |
| HV supply | 4 kV, 1 mA | integrated in driver |
* Keep safety distance at least 5 mm from any side of board or any component to surrounding conductive parts.
DQF series drivers are designed for Q-switching of nanosecond flashlamp pumped lasers without use of phase retardation plates. High voltage is applied to Pockels cell in order to inhibit oscillation. Pockels cell is opened by negative polarity pulse allowing laser to radiate.
Driver DFQ-0.2-5D needs an external HV power supply, PS-5 model is recommended.
Driver DFQ-0.1-8D is integrated with 4 kV HV power suppliy. High voltage can be controlled either by onboard trimmer potentiometer or by using CAN interface. We suggest CAN-USB converter with CAN browser software for Windows operating system. CAN browser can be kept disconnected after proper voltage value is set.
