1064nm laser beam expander is a critical optical component designed specifically for Nd:YAG lasers, fiber lasers, and infrared laser systems. It converts small-diameter laser beams into collimated large-diameter beams, effectively reducing beam divergence, lowering power density, and enhancing far-field focusing performance. This product series is widely utilized in laser processing, medical, and research applications.

Optical Design

1064nm beam expanders primarily employ a Galilean lens configuration consisting of one diverging lens and one converging lens. With no real focal point inside the expander, this design is particularly well-suited for high-power laser applications as it effectively avoids air breakdown risks. For short-pulse or ultrafast laser applications, select high-end models utilize fused silica substrates and air-spaced, cement-free structures to enhance thermal stability and damage resistance.

Key Specifications

The product series offers a wide range of expansion magnifications from 2X to 20X, with custom magnifications available upon request. Transmission rates typically exceed 97%, with high-performance models achieving over 99% transmission. Laser-induced damage threshold (LIDT) varies by design and coating - standard models achieve 4-10 J/cm² (10ns pulse conditions), while high-quality models can reach >25 J/cm² at 1064nm. Many products also feature adjustable divergence compensation, helping to correct collimation differences between various laser sources.

Typical Applications

1064nm beam expanders play an essential role in laser material processing, including cutting, welding, marking, and drilling precision applications. In research contexts, they are widely used in laser interferometry, spectroscopic analysis, and optical system integration.

Mounting and Customization

Standard mounting threads include M30x1, M27x0.5, M34 P1, and other options. Select models feature C-mount or T2-mount (M42x0.75) thread interfaces. Depending on specific processing accuracy requirements and system constraints, customers may choose between fixed-magnification and adjustable-magnification products.