High-power laser diode driver UNILDD

The uniLDD series are ultra-stable and high power laser diode drivers with an internal TEC controller option, designed for precise current and temperature control of laser diodes. These drivers are suitable for pumping diode-pumped solid state lasers (DPSSL) and for powering and beam modulation of direct diode lasers, supporting both pulsed (QCW) and continuous (CW) operation modes. Compatible with a wide range of diodes including single emitters, bars, stacks, VCSELs, and LEDs, uniLDD drivers are highly customizable to meet specific OEM requirements and can be tailored for optimal performance, cost, and size. Certain versions can function simultaneously as current sources for laser diodes and as TEC controllers, with up to two independent TEC channels.

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
• Comprehensive protections: current transient (overload) protection, open circuit shut-down, over temperature shut-down, power voltage brownout shut-down, interlock shut-down
• Drivers can function as both TEC controllers and LDD current sources
• Control via analog and digital (CAN, RS232) interfaces; USB, LAN, WLAN available upon request
• Modular, customizable design for OEM needs
• Fast turnaround from inquiry to prototyping and high-volume manufacturing

Applications

• Industrial lasers
  Micromachining, welding, and cutting
• Medical lasers
  Ophthalmology, dermatology, and surgery
• Scientific lasers
  Fusion research, spectroscopy, and high-energy physics

Description
uniLDD laser diode drivers ensure precise current and temperature control, supporting both pulsed and continuous operation. They are compatible with a wide range of diodes and can be customized for optimal performance in various regimes. For high-volume OEM customers, unnecessary components can be removed for cost and size optimization. Some versions can act as both current sources and TEC controllers, with up to two independent TEC channels.

Performance

• Current ripple and amplitude stability: 0.1% pk-pk
• Compliance voltage: 1 V to 600 V (with booster board)
• Current drift: <0.2% over 8 hours after 5 min warm-up

Model Variants and Key Specifications

• Conductively cooled uniLDD-C
  • Operation mode: CW or QCW
  • Compliance voltage: 1–70 V (CW), 1–65 V (QCW)
  • Current range: 10–100 A (CW), up to 160 A (QCW)
  • Max power: 3 kW
  • Power conversion efficiency: 90–98%
  • Current pulse amplitude stability: 0.1% pk to pk
  • Current ripple: 0.1% pk to pk
  • Current drift: <0.2%
  • Duty cycle: ≤20% (QCW)
  • Repetition rate: ≤5 kHz (QCW)
  • Dimensions: 130 x 90 x 30/54 mm
  • Cooling: Conductive
• Forced-air cooled uniLDD-A
  • Operation mode: CW or QCW
  • Compliance voltage: 1–50 V (CW), 1–85 V (QCW)
  • Current range: 10–100 A (CW), up to 360 A (QCW)
  • Max power: 2 kW
  • Power conversion efficiency: 90–98%
  • Current pulse amplitude stability: 0.1% pk to pk
  • Current ripple: 0.1% pk to pk
  • Current drift: <0.2%
  • Duty cycle: ≤20% (QCW)
  • Repetition rate: ≤5 kHz (QCW)
  • Dimensions: 208 x 65 x 103 mm
  • Cooling: Forced-air
• High power Bi/Tri-uniLDD
  • Operation mode: CW or QCW
  • Compliance voltage: 1–50 V (CW), 1–85 V (QCW)
  • Current range: up to 1200 A (Tri-uniLDD-A-QCW)
  • Max power: up to 6 kW
  • Power conversion efficiency: 90–98%
  • Current pulse amplitude stability: 0.1% pk to pk
  • Current ripple: 0.1% pk to pk
  • Current drift: <0.2%
  • Duty cycle: ≤20% (QCW)
  • Repetition rate: ≤5 kHz (QCW)
  • Dimensions: up to 250 x 200 x 98 mm
  • Cooling: Forced-air

Interface

• Analog and digital (CAN, RS232) interfaces by default
• USB, LAN, WLAN available upon request (with communication board)
• Comprehensive analog pinout for enable, interlock, monitoring, and control

Accessories

• CAN-USB adapter (on request, required at evaluation stage)
• Communication board for RS232, USB, LAN, WLAN (on request)
• Voltage booster board (on request, for higher compliance voltage)
• Baseplate (copper or aluminum, included by default or on request)
• Output/input power cables (included upon request, customizable)
• Control cables (included by default)
• External capacitors (on request)

Physical and Operating Requirements

• Operating ambient temperature: ≤40°C
• Operating baseplate temperature: ≤50°C (conductive models)
• Cooling method: Conductive or forced-air depending on model

Characteristics / Technical Specifications

• Current range: 10–1200 A (depending on model)
• Compliance voltage: 1–600 V (with booster board)
• Output power: up to 6 kW
• Current stability: 0.1% pk to pk
• Current ripple: 0.1% pk to pk
• Current drift: <0.2%
• Power conversion efficiency: 90–98%
• Duty cycle: up to 20% (QCW)
• Repetition rate: up to 5 kHz (QCW)
• TEC control: 0, 1, or 2 channels, 1–25 A, 1–36 V, 350 W per channel
• Control interfaces: Analog, CAN, RS232 (default); USB, LAN, WLAN (on request)
• Protections: Overload, open circuit, over temperature, voltage brownout, interlock
• Dimensions: from 130 x 90 x 30 mm up to 250 x 200 x 98 mm depending on model
• Cooling: Conductive or forced-air