JOLD-Stacks

The JOLD–Stacks Series offers a highly modular approach for power scaling well into the kW range. The series features compact, lightweight, and robust multimode, free-space laser diode stacks with options for 760-1070 nm, CW & QCW operation, output power up to 2400 W (QCW), no lensing or FAC or FAC/SAC collimation, active or passive cooling, and are completely customizable. JOLD-Stacks achieve optimal beam quality by reducing the stack pitch without compromising cooling capacity, and our proven hard-solder technology and strictly monitored production processes ensure tried & tested reliability in the harshest environments.

Your OEM Laser Diode Solution Awaits!

Many configuration options available:

• Wavelength: Options from 760-1070 nm (multi-wavelength stacks available for “color mixing”)
• Optical output power: number of bars per stack
• Operating mode: CW or QCW/long-pulse
• Cooling: active with DI or tap water or passive/conductive
• Packaging: with or without housing and protective window option
• Lensing: FAC or FAC/SAC lensing available

Passively Cooled Stacks:

QCW- and long-pulse configurations utilize vertical stacks made up of CTE-matched submounts on Direct-Copper-Bonded (DCB) substrates. This type of vertical stack clearly offers several advantages:

• Tap water or passive cooling of the DCB
• Light-weight
• Small footprint
• Compact multi-stack arrangements offering additional power scaling  (multi-stack packages)
• Ideal for Medical applications like laser-based therapy for ophthalmology, dermatology, and esthetics

Passively Cooled QCW Stack Examples

Let us help choose the right configuration for YOU!

Actively Cooled Stacks:

Microchannel-cooled packages (MCCP) which are actively cooled with DI water for CW-operation, utilizing best-known practices regarding microchannel designs, DI-water specification, and cooling circuit maintenance, enabling package-limited lifetimes > 10k hours – relevant for industrial applications:

• DI-water cooling for MCC packages
• Light-weight
• Small footprint
• Compact multi-stack arrangements offering additional power scaling  (multi-stack packages)
• Ideal for Material Processing & DDL applications like welding, soldering, hardening, and annealing

Actively Cooled CW Stack Examples

Other wavelengths, heat sink variants, and configurations upon request. Let us know what you need!

Let us help choose the right configuration for YOU!

Benefits:

• Modular Power Scaling:
  • Vertical stacking of individual sub-mounts within multi-laser-bar packages
  • Highly modular approach for power scaling well into the kW-range
  • Flexibly scale-up a laser stack to the requested power level at a given center wavelength
• Optimized Beam Quality:
  • Beam quality (beam-parameter-product, BPP) optimized with lowest pitches
  • Neighboring stack distance approaching 1.0 mm without compromising on cooling capacity of the submounts
• Proven Reliability:
  • Tried & tested under application-specific conditions ranging from medical, industrial to mission-critical end use
  • Proven hard-solder technology that covers even the harshest environmental conditions
  • Strictly monitored production in clearly defined processes based on certifications
• Customization and Design Flexibility for Comprehensive Solutions:
  • Tailored solutions to meet your unique application requirements
  • Reliable laser solutions, providing you with the specifications you need
  • From wafer to component, module, and beyond – let us know what you need!

Don’t hesitate to ask us anything!

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