20X Long-Range Laser Beam Expander/Collimator – 30m/70m Versions

This professional-grade beam expander and collimator is engineered to transform high-power direct-diode laser pump sources into precise, long-range cutting, engraving, or alignment tools. Designed specifically for pump lasers from 10W to 3000W, it dramatically reduces beam divergence, enabling effective working distances of 30m to over 100m. Featuring a fully modular metal construction, multi-thread zoom adjustment, and high-performance AR coatings, it is the ideal optical accessory for industrial, research, and high-power laser system applications requiring extended focal performance.

Key Features

• 20X Beam Expansion: Significantly reduces beam divergence for ultra-long-range projection and improved focus stability.

• Dual-Range Models: Optimized for 30m or 70m+ effective working distances (100m maximum tested range).

• High-Power Compatibility: Supports direct-diode pump sources from 10W up to 3000W.

• Active Thermal Management: Proprietary lens barrel design prevents overheating and thermal lensing, maintaining optical stability.

• Premium Optical Coating: Lenses feature dual-sided anti-reflection (AR) coating optimized for 900-1100nm wavelength range, maximizing transmission and reducing internal reflections.

• Fast, Precise Zoom: Multi-start threaded mechanism allows for quick and smooth focal adjustment.

• Fully Modular & Durable: All-metal lens tube with anodized, sandblasted finish. All components are user-serviceable and replaceable.

• Includes Mounting Base: Comes with a standard base featuring a 6mm center hole (round). Fixed-hole base available upon request.

Technical Specifications

• Model Designation:

  • BE-EXP-20X-30: Optimized for ~30m effective working distance.

  • BE-EXP-20X-70: Optimized for ~70m+ effective working distance (tested to 100m with 500W pump).

• Optical Performance:

  • Expansion Ratio: 20X

  • Wavelength Range: 900 – 1100nm (Peak transmission at 976nm)

  • Input Beam Diameter: Accepts standard direct-diode output (compatible with common fiber collimators).

  • Output Beam Divergence: < 0.5 mrad (typical, dependent on input beam quality)

• Mechanical & Physical:

  • Construction: Full aluminum alloy, anodized sandblasted finish.

  • Focus Mechanism: Multi-start precision threads for smooth zoom adjustment.

  • Mounting Base: Standard 6mm center round hole. Optional fixed-hole pattern.

  • Lens Mount: Threaded, removable lens cells for easy cleaning or replacement.

• Environmental & Durability:

  • Operating Temperature: -10°C to +60°C

  • Coating Durability: Meets MIL-C-675A standards for abrasion and environmental resistance.

Applications

• Long-range laser cutting, welding, and surface treatment.

• High-power laser marking and engraving at extended distances.

• Lidar, sensing, and alignment systems.

• Scientific research and experimental optics requiring low-divergence beams.

• Integration into custom “laser cannon” or directed-energy system prototypes.

Package Contents

• 1 x Beam Expander/Collimator Unit (30m or 70m model)

• 1 x Anodized Aluminum Mounting Base (6mm center hole)

• 1 x Lens Cleaning Cloth and Dust Cap

• 1 x Basic Alignment & User Guide

Ordering Information (SKU Table)

Compatibility Note

This beam expander is designed for use with collimated output from direct-diode laser pump sources. Ensure your laser system outputs a relatively collimated beam before the expander for optimal performance. Custom adapters for specific fiber collimators are available upon inquiry.

Engineered for precision and durability by professional optical designers. Specifications may be refined for continuous improvement.