Menu

Vigitek

  • 203.829.5756
  • [javascript protected email address]
Home Diode driving Pulsed diode drivers for Nd:YAG pumping SDC-150A diode controller

SDC-150A diode controller

Applications

  • DPSS Nd:YAG pumping + q-switching

Features

  • The module consists of pulsed current source, TEC controller and Pockels cell driver (DKDP or LiNbO3)
  • Input – 28±7 V DC
  • Output diode current – up to 150 A, 25 V, 300 us, 30 Hz (but 20 W max)
  • Pulse width – 50 – 300 us
  • Repetition rate – up to 30 Hz
  • Rise / fall time – < 50 us
  • Modifications are possible

Description

SDC-150A is a complete solution for powering and controlling a diode-pumped solid-state Nd:YAG laser. Our module includes a pulsed current source to drive pumping diodes, TEC controller for their thermal stabilization and embedded Pockels cell driver for generation of Q-switched pulses. The module requires a 28 V DC (±7 V) power supply.

SDC-150A can be controlled either digitally via RS-232 interface or manually using jumpers and trimpots (stand-alone mode). Base interface is RS-232 (RS-485 is available as an option). Simple PC software is supplied together with the controller.

The module could be synchronized internally, when pulses are generated according to the internal clock, or externally, when pulses with user fixed width are triggered by external synchronization signal.

The cooling, when needed, is performed through the heatsink attached to the bottom surface.

Technical Specifications

Input:

Voltage
28±7 V DC
Current consumption
5 A max

Output 1 (diode driver, pulses to pumping diodes):

Load
Laser diodes (bars and stacks)
Diode compliance voltage (VMAX)1
25 V by default (other on request)
Maximum output current (IMAX)1
150 A by default (other on request)
Output current (I)
10 – 100 % of IMAX adjustable
Pulse width (t)
50 – 300 us adjustable (other on request)
Repetition rate (f)
1 – 30 Hz adjustable (other on request)
Rise / fall time
< 50 us
Accuracy
< 1% of IMAX
Maximum output power (V*I*t*f)
> 20 W by default (maximum parameters cannot be realized at the same time due to the maximum power limitation)
> 40 W on request (with derated operation temperature)
Target regime
150 A, 25 V, 250 us, 20 Hz (< 20 W)

Output 2 (TEC):

Load
Peltiers
Max. current / voltage
< 5 A / 20 V (other on request)
Temperature range
+20 … +60 °C
Accuracy
0.1 °C
Thermistor
NTC 10 kOhm

Output 3 (Pockel cell driver, DKDP version):

Load
DKDP Pockels cell
Load capacitance
5-7 pF
Pulse shape
Triangular (fast rise, relatively slow decay)
Rise time
< 20 ns
Recovery time
5 us typically
Pulse amplitude
1600 … 4000 V adjustable
Bias voltage
No
Other
Adjustable delay relatively to the diode driver

Output 3 (Pockel cell driver, LiNbO3 version):

Load
LiNbO3 Pockels cell
Load capacitance
< 20 pF
Pulse shape
Triangular (fast rise, relatively slow decay)
Rise time
< 30 ns
Recovery time
5 us typically
Pulse amplitude
800 – 2000 V adjustable (other on request)
Bias voltage
On request
Other
Adjustable delay relatively to the diode driver
Cooling
Passive cooling through a cold-plate attached to the driver’s bottom; the customer’s responsibility is to keep the cold-plate temperature below 70ºC (e.g. by attaching cold-plate to a massive heatsink or to system’s chassis)
Protections
• From mismatched load at the output
• From short-circuit at the outputs
• From overheating of internal components
• Interlock door connection
Interfaces (digital)
RS-232 machine interface
Interfaces (analogue)
• IDC
• Fault
• Synchro input
• Synchro output

Environment:

Operating temperature
Driver is designed for –30 … +55 ºC operating temperatures (we do our best to assure good performance in the required range of operating temperatures, though due to the absence of temperature chamber real testing in whole range of ambient temperatures is not performed by us)
Storage temperature
-40 … +85 °C
Humidity
0 … 90%, non-condensing

Other:

Size (LxWxH)
190x110x60 mm
Weight
<1.0 kg

 

1) The maximum peak power (IMAX * VMAX) shouldn’t exceed 10 kW

Options

Many parameters of the SDC-150A can be taylored to your needs. Some of them are listed below:

  • output voltage / current for diodes
  • output voltage (Pockels cell driver)
  • reduced or bursted output power
  • interfaces
  • type and location of connectors

How to Order

Modifications

Model
Description
SDC-150A or
SDC-150A-25V

Base version:

  • • 150 A maximum output current
  • • 25 V maximum output voltage
  • • Maximum output power > 20 W
    (target regime 150 A, 25 V, 250 us, 20 Hz)

 

SDC-110A-85V

Customized version:

  • • 110 A maximum output current
  • • 85 V maximum output voltage
  • • Maximum output power > 20 W
    (target regime 110 A, 85 V, 220 us, 10 Hz)
SDC-110A-85V-HP

Customized version:

  • • 110 A maximum output current
  • • 85 V maximum output voltage
  • • Boosted output power; achieved by the cost of narrowed operating temperature range
  • • Maximum output power > 40 W
    (target regime 110 A, 85 V, 220 us, 20 Hz)
  • • Operating temperature 0 – 40 °C

Downloads

sdc-150a-manual-en
sdc-150a-manual-en.pdf (974 KB)