Fixed / Zoom / Motorized Beam Expander 1064nm / 532nm / 355nm / 266nm

Beam Expander 1064 / 532 / 355 / 266nm

We offer 3 types of beam expanders: fixed beam expanders, zoom beam expanders and motorised beam expanders at various wavelengths of 266nm, 343-355nm, 405nm, 633nm, 515-545nm, 808-980nm, 1030-1090nm, 155nm, 1850-1980nm, 10.6um. Other wavelengths and custom-designed beam expanders are available upon request. For more information, please feel free to contact us.

The specifications of the lenses used in the beam expanders are:

• Material: BK7 fine annealed, fused silica and ZnSe depending on laser wavelength.

• Diameter: -0.1mm

• Thickness: ±0.1mm

• Flatness: lamda/4

• Surface Quality: 60-40 scratch-dig

• Coating: HR dielectric coatings R > 99%

Part number description: BEST-xxx-yy-T-AA

• BEST --- BEST series beam expanders, zoom beam expanders.

• xxxx------- laser wavelength: 10.6 means 10.6um, 532 means 532nm, 633 means 633nm.

• yy -------- expansion ratio (magnification) in times

• T ---------- type: T means adjustable beam expander; none,means fixed beam expander. Here adjustable means that the distance between the inside 2 lenses is a little adjustable. The"adjustable" may change the beam divergence anlge a little.

• AA -------- special purpose.

Example: BEST-10.6-3: 10.6um fixed beam expander, 3x; BEST-10.6-3.5T: 10.6um zoom beam expander, max. 3.5x.

We may use the following abbreviations in the tables: WL=wavelength, MAG=magnification, CA=clear aperture, CA1=input clear aperture, CA2=output clear aperture, D1=input diameter, D2=output diameter, L1=total length of beam expander, M1=connection or mounting thread, D=diameter.

1. 1064nm Beam Expanders

BEH Series 1064nm Beam Expanders

BEH Series 1064nm Fixed Beam Expanders

BEH Series 1064nm Adjustable Beam Expanders

Remark: The input lens is quartz and output lens is optical glass. Optical glass output lens is availableupon request.

BEG Series Beam Expanders

There are 2 types outlines: trumpet (A series) and cylinder (B series). For all trumpets, the outside diameters of input and output ends are 26mm and 36mm respectively. The mount screw on the input is M22x0.75mm but the mount screw of the cylinders is M26x0.75.

Remark: The input lens in BEG-1064-2.5AQ and BEG-1064-3AQ is quartz and others are optical glass.

Remark: The input lens in BEG-1064-2.5BQ and BEG-1064-3BQ is quartz and others are optical glass.

BEST-C Series 1064nm Adjustable Beam Expanders

BEAL Series Beam Expanders (1064/532/355nm)

Our beam expanders are assembled using one perging and one converging lenses. As there is no focal point inside the beam expander, it can be used for high powers. Special treatment of lenses and mechanics is performed for UV application to improve lifetime and LIDT of the expander. Standard magnifications are from 1.1x to 10x. Beam expanders for any wavelengths between 266 - 2000 nm are available upon request.

Features

• Custom magnification and design on request

• Extended lifetime and LIDT for UV applications

• Inpidual reports of beam ellipticity, M2 and pointing stability parameters

• Custom wavelengths are available in the range of 250-3000nm

Standard specifications:

Typical items:

YBE Series Beam Expanders for 1um Lasers

YBE series beam expanders are intended for low power (500W) lasers such as Nd:YAG and Yb doped fiber lasers operating near the 1um wavelength. The beam expanders are of Galilean design and use multi-spectral Zinc Sulphide for the optics which has an absorption at 1um of 0.0005cm-1 (similar to ZnSe at 10.6um). ZnS also has 20 times the thermal conductivity of Fused Silica and a higher refractive index. The refractive index allows a two element design to be used rather than three elements.

2. 532nm Beam Expanders

BEST-C Series 532nm Adjustable Beam Expander

BEH Series 532nmFixed Beam Expanders

BEH Series 532nm Adjustable Beam Expanders

Remark: The input lens is quartz and output lens is optical glass. Optical glass output lens is availableupon request.

BEAL Series Beam Expanders

3. 355nm Beam Expanders

BEST-C Series 355nm Adjustable Beam Expander

BEH Series 355nm Fixed Beam Expanders

BEH Series 355nm Adjustable Beam Expanders

Remark: All the lenses are quartz.

BEAL Series Beam Expanders

BEST-W Series 355nm Adjustable Beam Expanders

4. 266nm Beam Expanders

BEST-W Series 266nm Beam Expanders

5. Beam Expander Mount

The beam expander mounts are used to hold a beam expander, red pilot diode, mirrors with the screw M22x0.75mm. They are 4D adjustable for optics alignment at angles, positions.

• Model: SMH-13-048

• 4D adjustable (4-axil adjustable) (X and Y direction travel ±2mm, X and Z direction tilting ±4 deg)

• Suitable for the beam expander with a screw of M22x0.75mm

• Dimension:60x60x45mm

Custom-made beam expander mounts available upon request.