• Broadband Designs for Tunable Lasers
• λ/10 Transmitted Wavefront Error
• Threaded Barrel Divergence Adjustment to Compensate for Input Beam Divergence

TECHSPEC® DA (Divergence Adjustable) Fixed Broadband Beam Expanders are designed for demanding tunable laser sources. These compact beam expanders are optimized at a wide range of wavelengths, with designs achieving λ/10 transmitted wavefront error and no internally focusing ghost images for compatibility with high power lasers. TECHSPEC DA Fixed Broadband Beam Expanders are easily integrated into prototype and advanced applications, while maintaining quality across the adjustment range. They are ideal for medical laser applications employing highly tunable Thulium and Holmium sources.

Note: To learn more about the difference between high and low power 2 micron beam expanders, along with the different types of fused silica, review our UV vs. IR Grade Fused Silica application note.