Free-Space Laser Diode Bars and Stacks

What are Free-Space Laser Diode Bars and Stacks?

Laser diode bars and stacks with free-space output are powerful light sources that consist of multiple laser diodes, or “emitters,” arranged to make a bar and multiple bars for a stack configuration designed for high power output. The term “free space” refers to the beam delivery method, where the laser beam is transmitted through open air or vacuum instead of being guided through an optical fiber. These laser diodes can be either single-mode or multimode and are typically Fabry-Perot laser diodes.

Have questions?

Filters Reset


Wavelength Selection

Power Selection





JDL Series

Unmounted Laser Diodes Unpackaged Laser Diodes - gold bars laid out on a grid in a black gel pak

The JDL series offers industry-leading high-power unmounted laser diode bars in the 760-1070 nm spectral region. Our unmounted laser diode bars are available in a wide range of emitter configurations, cavity lengths, and CW or QCW operational modes. We offer low fill factor bars suitable for fiber coupling, high-power bars up to 300W for CW or hard-pulse industrial DDL applications, and QCW bars up to 500W for QCW or long-pulse optical pumping and medical applications. With full customization options including custom designed epitaxial wafer structures, you’re sure to get the perfect solution for your needs.

JOLD-Stacks Series

various sleek modern brass and stainless steel laser diode bar stack housings

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.