Stacks Overview

In a bar, the individual emitting areas (emitters) lie side by side and, together with the non-emitting areas between the emitters, they form the so-called active layer. The number, the width, and the spacing of the emitters are dependent on the manufacturer. The relative value of the emitting areas in the active layer with respect to the bar width is called filling factor (FF). Typical filling factors are 30 – 90%. The center-to-center distance between two adjacent emitters is called emitter pitch. Z is the propagation axis of the laser radiation. The propagation axis Y is called fast axis (FA), the propagation axis X is termed slow axis (SA). This is connected with the beam angle (divergence) in the two planes, XZ and YZ.

Laser diodes bars and multimode laser diode stacks are available in unmounted laser diode bars, or mounted in conductively or actively cooled packages.

Multiple bars can be stacked in the horizontal or vertical direction to increase the output power.

We offer laser diode bar stacks in wavelengths ranging from 635nm-1908nm in several free space and fiber coupled packages.

Contact us today to let one of our knowledgeable Product Managers assist you!

JOLD-Stacks Series

JOLD-450-QAFN-5A: Laser Diode Stack w/ FAC

The JOLD-Stacks Series of high quality high power laser diode bar stacks. They are available with actively (microchannel) cooled or conductively cooled. And in wavelengths from 780nm – 1064nm.

JOLD-FC Series


The JOLD-FC Series of high quality high power fiber coupled laser diode bar products are offered in wavelengths from 780nm – 1064nm and 30W to 400W output power.