QDP-DT™ OEM Q-Drive for Flash Lamp Pumped Lasers
A double pulse OEM Pockels cell driver for flashlamp-pumped lasers.
Full Product Description- Fall time:
- 3.5 kV, 6 pF max: < 12 ns
- Rise time:
- 3.5 kV, 6 pF min: 1 µs, 3.5 kV, 6 pF min: 5 µs
- Amplitude:
- Nom: 5 V, Min: 4 V, Max: 6 V
Product description
This driver has a repetition rate from 0–50 Hz, an output voltage of 1.2–4.0 kV, rise times of 300–800 us, a fall time of 10 ns, with pulse widths of 160–300 μs.
This driver is designed for the q-switching of lasers without the need for phase retardation plates. Once triggered, high voltage is applied to inhibit the laser output.
When the second trigger is applied, the Pockels cell is opened by a fast negative pulse to allow laser output, then it returns to high voltage to inhibit additional lasing.
The Q-Drive Double Pulse has been shown to increase Pockels cell life expectancy and laser output power relative to constant voltage-on scenarios often employed.
The compact 127x87x32 mm circuit features an integrated high voltage power supply which includes remote voltage monitoring (1 V/kV) and remote shutdown.
Key features
- 1.2–4.0 kV adjustable output voltage
- 0–50 Hz repetition rate
- 300–800 μs nominal on time (adjustable)
- 5–7 μs wide delayed pulse (separate trigger)
- Fall time (delay pulse) less than 12 ns
Specifications
| Name | Value |
|---|---|
| Pulse repetition rate | 1 Hz, 50 Hz, Same as trigger input |
| Amplitude (V1+V2) adjustable (V2=10% of V1) | Min: 1.2 kV, Max: 4.0 kV |
| Total HV on time (adjustable) | Min: 300 µs, Max: 800 µs |
| Centre pulse width (trigger) | Min: 5 µs, Max: 7 µs |
| Fall time | 3.5 kV, 6 pF max: < 12 ns |
| Rise time | 3.5 kV, 6 pF min: 1 µs, 3.5 kV, 6 pF min: 5 µs |
| Load capacitance | 30 pF (with Pockels cell leads) |
| Input voltage | Min: 15 VDC, Max: 18 VDC, Exceeding 20 VDC will damage driver |
| Input current | 4.0 kV, 50 Hz, 10 pF load max: 250 mA |
| Input impedance | Nom: 100 Ω, Min: 90 Ω, Max: 110 Ω |
| Amplitude | Nom: 5 V, Min: 4 V, Max: 6 V |
| Pulse width | Min: 100 ns, Max: 100 µs, Set by user |
| Propagation delay | 80 ns, 100 ns, After trailing edge of trigger |
| Ambient temperature | 50° C |