uniLDD series

Ultra-stable and high power laser diode drivers with internal TEC controller option

Laser diode drivers, also known as laser diode controllers, for pumping of diode pumped solid state lasers (DPSSL) as well as powering and beam modulation of direct diode lasers for vast variety of industrial, medical, scientific and military applications.

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uniLDD
Overview

Features

  • Current range from 10 A to 1200 A
  • Compliance voltage range from 1 V to 600 V
  • Current stability of 0.1% pk to pk
  • Current ripple of 0.1% pk to pk
  • Output power up to 6 kW
  • Protections:
    • current transient (overload) protection;
    • open circuit shut-down;
    • over temperature shut-down;
    • power voltage brownout (voltage dip) shut-down;
    • interlock shut-down
  • Drivers can function simultaneously as TEC controllers and LDD current sources
  • Can be controlled via analog and digital (CAN, RS232) interfaces.
  • Uniquely customizable modular design ensures drivers can be tailored to precisely meet OEM customer’s needs
  • Fast turnaround times between inquiry, prototyping and high-volume manufacturing stages

Applications

EKSPLA laser diode drivers are optimal for pumping of femtosecond, picosecond, nanosecond and CW solid state lasers based on crystal, fiber or direct-diode technology. Most popular fields of applications are:

  • Industrial lasers
    micromachining, welding and cutting
  • Medical lasers
    ophthalmology, dermatology and surgery
  • Scientific lasers
    fusion research, spectroscopy, and high-energy physics

Description

uniLDD is the product line of laser diode drivers, also known as laser diode controllers, used in diode-pumped solid state lasers (DPSSL). The main purpose of laser diode drivers is to ensure precise current and temperature control of laser diodes. Our laser diode drivers are compatible with a wide range of diodes (single emitters, bars, stacks, VCSELs, LEDs) and support both pulsed (QCW) and continuous (CW) operation modes.

Ekspla’s laser diode controllers can provide currents from 10 A to 1200 A while maintaining 0.1% pk-pk current ripple and amplitude stability. Compliance voltages of our laser diode drivers vary from 1 V to 600 V. In the vast majority of cases we either partially customize or fully tailor our laser diode drivers for an optimal performance at customer’s required regimes. For high-volume OEM customers we also tailor our laser diode controllers by removing excessive components to make sure drivers are optimal parameter, cost and size wise.

Certain uniLDD laser diode driver versions can simultaneously function as current sources for laser diodes and TEC controllers, also known as Peltier element thermocontrollers. Noted laser diode driver versions can contain up to two output channels, which can be utilized as two independent TEC controllers.

Performance

uniLDD models coding scheme.

uniLDD models coding scheme.

ModeluniLDD-C-CWuniLDD-C-QCW
CW mode
uniLDD-C-QCW
QCW mode
Output specifications
Operation modeCW 1)CW 1)QCW 2)
Compliance voltage range, min-max 3)1 – 70 V 4)1 – 70 V1 – 65 V
Current range, min-max10 – 100 A 5)10 – 100 A10 – 160 A
Power, max3 kW 4)3 kW3 kW
Power conversion efficiency90 – 98 %90 – 98 %90 – 98 %
Current pulse amplitude stability0.1 % pk to pk 6)0.1 % pk to pk 6)0.1 % pk to pk 6)
Current ripple0.1 % pk to pk 7)0.1 % pk to pk 7)0.1 % pk to pk 7)
Current drift< 0.2 % 8)< 0.2 % 8)< 0.2 % 8)
Duty cycle≤ 20 %
Repetition rate, max≤ 5 kHz
Current rise time, typical5 – 100 μs 9)
Current pulse duration, typicalup to 100 ms 10)
RMS current, max100 A
Amount of functioning
internal TEC control channels
0, 1 or 2 11)0, 1 or 2 11)0, 1 or 2 11)
TEC control current, min-max per channel1 – 25 A1 – 25 A1 – 25 A
TEC control voltage, min-max per channel1 – 36 V1 – 36 V1 – 36 V
TEC control power, max per channel350 W350 W350 W
Input specifications
Power supply requirements
(power stage), min
UPS in min (V) = ULDD out max + 5
PPS in min (W) = ILDD out max * ULDD out max * duty cyclemax / 100 % * 1.2
UPS in min (V) = ULDD out max + 5
PPS in min (W) = ILDD out max * ULDD out max * duty cyclemax / 100 % * 1.2
UPS in min (V) = ULDD out max + 5
PPS in min (W) = ILDD out max * ULDD out max * duty cyclemax / 100 % * 1.2
Power supply requirements
(control stage)
12 V, 10 W12 V, 10 W12 V, 10 W
Control interfacesanalog, CAN & RS232 by default. USB, LAN & WLAN upon request 12)analog, CAN & RS232 by default. USB, LAN & WLAN upon request 12)analog, CAN & RS232 by default. USB, LAN & WLAN upon request 12)
SoftwareEkspla’s control software 13)Ekspla’s control software 13)Ekspla’s control software 13)
Protectionscurrent transient (overload) protection; open circuit shut-down; over temperature shut-down; power voltage brownout (voltage dip) shut-down; interlock shut-downcurrent transient (overload) protection; open circuit shut-down; over temperature shut-down; power voltage brownout (voltage dip) shut-down; interlock shut-downcurrent transient (overload) protection; open circuit shut-down; over temperature shut-down; power voltage brownout (voltage dip) shut-down; interlock shut-down
Physical characteristics
Dimensions (L x W x H) 14)130 x 90 x 30 mm130 x 90 x 54 mm130 x 90 x 54 mm
Operating requirements
Cooling methodConductiveConductiveConductive
Operating ambient temperature≤ 40 °C≤ 40 °C≤ 40 °C
Operating baseplate temperature≤ 50 °C≤ 50 °C≤ 50 °C
Accessories
CAN-USB adapteron request. Required at evaluation stage 15)on request. Required at evaluation stage 15)on request. Required at evaluation stage 15)
Communication boardon request. For driver control via RS232, USB, LAN, WLAN interfaces 16)on request. For driver control via RS232, USB, LAN, WLAN interfaces 16)on request. For driver control via RS232, USB, LAN, WLAN interfaces 16)
Voltage booster boardon request 4)on request 4)on request 4)
Baseplatecopper, included by defaultcopper, included by defaultcopper, included by default
Output power cablesincluded upon request, custom dia and lengthincluded upon request, custom dia and lengthincluded upon request, custom dia and length
Input power cablesincluded upon request, custom dia and lengthincluded upon request, custom dia and lengthincluded upon request, custom dia and length
Control cablesincluded by defaultincluded by defaultincluded by default
External capacitorson request 17)on request 17)on request 17)
ModeluniLDD-C-CWuniLDD-C-QCW
CW mode
uniLDD-C-QCW
QCW mode
  1. Continuous-wave.
  2. Quasi-continuous-wave (also known as pulsed).
  3. Range between minimum and maximum limits. Not all maximal limits can be reached simultaneously.
  4. Maximum compliance voltage and maximum power can be extended for certain versions by using booster board layout. Ekspla’s booster board which allows to extend output compliance voltage of certain uniLDD versions. In certain cases output compliance voltage can be increased up to 600 V. Can be added at factory upon Ekspla’s recommendations.
  5. Maximum current can be extended for certain versions by connecting drivers in parallel.
  6. In ×0.5…×1 of max current range.
  7. DC…100 kHz bandwidth, in ×0.5…×1 of max current range.
  8. Cold start, 8 h period, after 5 min. warm up.
  9. Factory software tuned upon customer’s request.
  10. Factory software & hardware tuned upon customer’s request.
  11. Amount factory enabled upon customer’s request.
  12. USB, LAN & WLAN control interfaces are available upon customer’s request while using Ekspla’s external communication board.
  13. Ekspla’s control software & protocol description included by default.
  14. External driver dimensions can vary ± 20 mm due to the minor hardware variations like fans and current sensors.
  15. Ekspla’s CAN-USB adapter is required at evaluation stage if communication via CAN interface is needed.
  16. Ekspla’s communication board allows to control driver via RS232, USB, LAN, WLAN interfaces. Can be provided upon request.
  17. Included upon Ekspla’s recommentadion. Custom mounting solutions for external capacitor are available upon request.
ModeluniLDD-A-CWuniLDD-A-QCW
CW mode
uniLDD-A-QCW
QCW mode
Output specifications
Operation modeCW 1)CW 1)QCW 2)
Compliance voltage range, min-max 3)1 – 50 V1 – 50 V1 – 85 V
Current range, min-max10 – 100 A10 – 100 A10 – 360 A
Power, max2 kW2 kW2 kW
Power conversion efficiency90 – 98 %90 – 98 %90 – 98 %
Current pulse amplitude stability0.1 % pk to pk 4)0.1 % pk to pk 4)0.1 % pk to pk 4)
Current ripple0.1 % pk to pk 5)0.1 % pk to pk 5)0.1 % pk to pk 5)
Current drift< 0.2 % 6)< 0.2 % 6)< 0.2 % 6)
Duty cycle≤ 20 %
Repetition rate, max≤ 5 kHz
Current rise time, typical5 – 100 μs
Current pulse duration, typicalup to 100 ms
RMS current, max80 A
Amount of functioning
internal TEC control channels
0, 1 or 2 7)0, 1 or 2 7)0, 1 or 2 7)
TEC control current, min-max per channel1 – 25 A1 – 25 A1 – 25 A
TEC control voltage, min-max per channel1 – 36 V1 – 36 V1 – 36 V
TEC control power, max per channel350 W350 W350 W
Input specifications
Power supply requirements
(power stage), min
UPS in min (V) = ULDD out max + 5
PPS in min (W) = ILDD out max * ULDD out max * duty cyclemax / 100 % * 1.2
UPS in min (V) = ULDD out max + 5
PPS in min (W) = ILDD out max * ULDD out max * duty cyclemax / 100 % * 1.2
UPS in min (V) = ULDD out max + 5
PPS in min (W) = ILDD out max * ULDD out max * duty cyclemax / 100 % * 1.2
Power supply requirements
(control stage)
12 V, 10 W12 V, 10 W12 V, 10 W
Control interfacesanalog, CAN & RS232 by default. USB, LAN & WLAN upon request 8)analog, CAN & RS232 by default. USB, LAN & WLAN upon request 8)analog, CAN & RS232 by default. USB, LAN & WLAN upon request 8)
SoftwareEkspla’s control software 9)Ekspla’s control software 9)Ekspla’s control software 9)
Protectionscurrent transient (overload) protection; open circuit shut-down; over temperature shut-down; power voltage brownout (voltage dip) shut-down; interlock shut-downcurrent transient (overload) protection; open circuit shut-down; over temperature shut-down; power voltage brownout (voltage dip) shut-down; interlock shut-downcurrent transient (overload) protection; open circuit shut-down; over temperature shut-down; power voltage brownout (voltage dip) shut-down; interlock shut-down
Physical characteristics
Dimensions (L x W x H) 10)208 x 65 x 103 mm208 x 65 x 103 mm208 x 65 x 103 mm
Operating requirements
Cooling methodForced-airForced-airForced-air
Operating ambient temperature≤ 40 °C≤ 40 °C≤ 40 °C
Accessories
CAN-USB adapteron request. Required at evaluation stage 11)on request. Required at evaluation stage 11)on request. Required at evaluation stage 11)
Communication boardon request. For driver control via RS232, USB, LAN, WLAN interfaces 12)on request. For driver control via RS232, USB, LAN, WLAN interfaces 12)on request. For driver control via RS232, USB, LAN, WLAN interfaces 12)
Voltage booster boardon request 13)on request 13)on request 13)
Baseplatealuminum, included upon requestaluminum, included upon requestaluminum, included upon request
Output power cablesincluded upon request, custom dia and lengthincluded upon request, custom dia and lengthincluded upon request, custom dia and length
Input power cablesincluded upon request, custom dia and lengthincluded upon request, custom dia and lengthincluded upon request, custom dia and length
Control cablesincluded by defaultincluded by defaultincluded by default
External capacitorson request 14)on request 14)on request 14)
ModeluniLDD-A-CWuniLDD-A-QCW
CW mode
uniLDD-A-QCW
QCW mode
  1. Continuous-wave.
  2. Quasi-continuous-wave (also known as pulsed).
  3. Range between minimum and maximum limits. Not all maximal limits can be reached simultaneously.
  4. In ×0.5…×1 of max current range.
  5. DC…100 kHz bandwidth, in ×0.5…×1 of max current range.
  6. Cold start, 8 h period, after 5 min. warm up.
  7. Amount factory enabled upon customer’s request.
  8. USB, LAN & WLAN control interfaces are available upon customer’s request while using Ekspla’s external communication board.
  9. Ekspla’s control software & protocol description included by default.
  10. External driver dimensions can vary ± 20 mm due to the minor hardware variations like fans and current sensors.
  11. Ekspla’s CAN-USB adapter is required at evaluation stage if communication via CAN interface is needed.
  12. Ekspla’s communication board allows to control driver via RS232, USB, LAN, WLAN interfaces. Can be provided upon request.
  13. Maximum compliance voltage and maximum power can be extended for certain versions by using booster board layout. Ekspla’s booster board which allows to extend output compliance voltage of certain uniLDD versions. In certain cases output compliance voltage can be increased up to 600 V. Can be added at factory upon Ekspla’s recommendations.
  14. Included upon Ekspla’s recommentadion. Custom mounting solutions for external capacitor are available upon request.
ModelBi-uniLDD-A-QCW
CW mode
Bi-uniLDD-A-QCW
QCW mode
Tri-uniLDD-A-QCW
CW mode
Tri-uniLDD-A-QCW
QCW mode
Output specifications
Operation modeCW 1)QCW 2)CW 1)QCW 2)
Compliance voltage range, min-max 3)1 – 50 V1 – 85 V1 – 50 V1 – 85 V
Current range, min-max20 – 200 A20 – 800 A30 – 300 A30 – 1200 A
Power, max4 kW4 kW6 kW6 kW
Power conversion efficiency90 – 98 %90 – 98 %90 – 98 %90 – 98 %
Current pulse amplitude stability0.1 % pk to pk 4)0.1 % pk to pk 4)0.1 % pk to pk 4)0.1 % pk to pk 4)
Current ripple0.1 % pk to pk 5)0.1 % pk to pk 5)0.1 % pk to pk 5)0.1 % pk to pk 5)
Current drift< 0.2 % 6)< 0.2 % 6)< 0.2 % 6)< 0.2 % 6)
Duty cycle≤ 20 %≤ 20 %
Repetition rate, max≤ 5 kHz≤ 5 kHz
Current rise time, typical5 – 100 μs5 – 100 μs
Current pulse duration, typicalup to 100 msup to 100 ms
RMS current, max160 A240 A
Amount of functioning
internal TEC control channels
0000
Input specifications
Power supply requirements
(power stage), min
UPS in min (V) = ULDD out max + 5
PPS in min (W) = ILDD out max * ULDD out max * duty cyclemax / 100 % * 1.2
UPS in min (V) = ULDD out max + 5
PPS in min (W) = ILDD out max * ULDD out max * duty cyclemax / 100 % * 1.2
UPS in min (V) = ULDD out max + 5
PPS in min (W) = ILDD out max * ULDD out max * duty cyclemax / 100 % * 1.2
UPS in min (V) = ULDD out max + 5
PPS in min (W) = ILDD out max * ULDD out max * duty cyclemax / 100 % * 1.2
Power supply requirements
(control stage)
12 V, 20 W12 V, 20 W12 V, 25 W12 V, 25 W
Control interfacesanalog, CAN & RS232 by default. USB, LAN & WLAN upon request 7)analog, CAN & RS232 by default. USB, LAN & WLAN upon request 7)analog, CAN & RS232 by default. USB, LAN & WLAN upon request 7)analog, CAN & RS232 by default. USB, LAN & WLAN upon request 7)
SoftwareEkspla’s control software 8)Ekspla’s control software 8)Ekspla’s control software 8)Ekspla’s control software 8)
Protectionscurrent transient (overload) protection; open circuit shut-down; over temperature shut-down; power voltage brownout (voltage dip) shut-down; interlock shut-downcurrent transient (overload) protection; open circuit shut-down; over temperature shut-down; power voltage brownout (voltage dip) shut-down; interlock shut-downcurrent transient (overload) protection; open circuit shut-down; over temperature shut-down; power voltage brownout (voltage dip) shut-down; interlock shut-downcurrent transient (overload) protection; open circuit shut-down; over temperature shut-down; power voltage brownout (voltage dip) shut-down; interlock shut-down
Physical characteristics
Dimensions (L x W x H) 9)250 x 146 x 98 mm250 x 146 x 98 mm250 x 200 x 98 mm250 x 200 x 98 mm
Operating requirements
Cooling methodForced-airForced-airForced-airForced-air
Operating ambient temperature≤ 40 °C≤ 40 °C≤ 40 °C≤ 40 °C
Accessories
CAN-USB adapteron request. Required at evaluation stage 10)on request. Required at evaluation stage 10)on request. Required at evaluation stage 10)on request. Required at evaluation stage 10)
Communication boardon request. For driver control via RS232, USB, LAN, WLAN interfaces 11)on request. For driver control via RS232, USB, LAN, WLAN interfaces 11)on request. For driver control via RS232, USB, LAN, WLAN interfaces 11)on request. For driver control via RS232, USB, LAN, WLAN interfaces 11)
Voltage booster boardon request 12)on request 12)on request 12)on request 12)
Baseplatealuminum,
included by default
aluminum,
included by default
aluminum,
included by default
aluminum,
included by default
Output power cablesincluded upon request, custom dia and lengthincluded upon request, custom dia and lengthincluded upon request, custom dia and lengthincluded upon request, custom dia and length
Input power cablesincluded upon request, custom dia and lengthincluded upon request, custom dia and lengthincluded upon request, custom dia and lengthincluded upon request, custom dia and length
Control cablesincluded by defaultincluded by defaultincluded by defaultincluded by default
External capacitorson request 13)on request 13)on request 13)on request 13)
ModelBi-uniLDD-A-QCW
CW mode
Bi-uniLDD-A-QCW
QCW mode
Tri-uniLDD-A-QCW
CW mode
Tri-uniLDD-A-QCW
QCW mode
  1. Continuous-wave.
  2. Quasi-continuous-wave (also known as pulsed).
  3. Range between minimum and maximum limits. Not all maximal limits can be reached simultaneously.
  4. In ×0.5…×1 of max current range.
  5. DC…100 kHz bandwidth, in ×0.5…×1 of max current range.
  6. Cold start, 8 h period, after 5 min. warm up.
  7. USB, LAN & WLAN control interfaces are available upon customer’s request while using Ekspla’s external communication board.
  8. Ekspla’s control software & protocol description included by default.
  9. External driver dimensions can vary ± 20 mm due to the minor hardware variations like fans and current sensors.
  10. Ekspla’s CAN-USB adapter is required at evaluation stage if communication via CAN interface is needed.
  11. Ekspla’s communication board allows to control driver via RS232, USB, LAN, WLAN interfaces. Can be provided upon request.
  12. Maximum compliance voltage and maximum power can be extended for certain versions by using booster board layout. Ekspla’s booster board which allows to extend output compliance voltage of certain uniLDD versions. In certain cases output compliance voltage can be increased up to 600 V. Can be added at factory upon Ekspla’s recommendations.
  13. Included upon Ekspla’s recommentadion. Custom mounting solutions for external capacitor are available upon request.

Analog interface pinout

PinSignal nameDirectionVoltage levelDescription
1EnableInputTTL (LVTTL)
200 µA pull up to 3.3 V
The Enable function gives permission to operate for TEC driver and consequently for LDD driver.
2Ready To Operate (RTO)Input/Output through 330 Ω resistor2.4 V driver output is active,
< 0.5 V output is clamped
RTO is tied to ‘High’ by the driver when ‘Active RTO ‘ is enabled and the driver is in active state. Alarms clamp RTO low and disable driver output. External device may clamp RTO to GND and disable driver output. RTO allows to join fault circuits of several drivers connected in parallel
3InterlockInput10 kΩ pull up to 3.3 V,
LOW = < 0.4 V
The Interlock function can be connected to external safety or machine protection switches such as door or temperature switches. Open = OFF Connect to GND = RUN
4GND
5Vout monitorOutputVout, driver output voltageThe output voltage monitor.
Vout = Diode compliance voltage + voltage drop on connection wires
6Iout monitorOutput0 – 10 V* = 0 – IoutmaxThe output current monitor
7IprogramInput0 – 10 V* = 0 – IoutmaxOutput current setting or modulating by applying a voltage, CW and Pulse mode
8Pulse controlInputTTL, LVTTL positive pulseIn TriggerIN mode: trigger input. A rising pulse provided to this connector will trigger an output current pulse of a preset width.
In Time-gated mode: input to start/stop the output current.” Connection “Trigger input” performs the same function
9GND
10+5VOutputAuxiliary 200 mA
11+5VOutputAuxiliary 200 mA
12-15VOutputAuxiliary 200 mA
13+15VOutputAuxiliary 200 mA
14+15VOutputAuxiliary 200 mA
15GND
PinSignal nameDirectionVoltage levelDescription

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