Compare Model Drawings, CAD & Specs Availability Price
Nd:YAG Harmonic Beamsplitter, 25.4 mm, 1064 nm Refl., 532 nm Trans.
$232
Nd:YAG Harmonic Beamsplitter, 25.4 mm, 532 nm Refl., 1064 nm Trans.
$232
Nd:YAG Harmonic Beamsplitter, 25.4 mm, 354.7 nm Refl., 1064 nm Trans.
$282
Nd:YAG Harmonic Beamsplitter, 25.4 mm, 354.7 nm Refl., 532 nm Trans.
$282
Nd:YAG Harmonic Beamsplitter, 25.4 mm, 266 nm Refl., 1064 nm Trans.
$282
Nd:YAG Harmonic Beamsplitter, 25.4 mm, 266 nm Refl., 532 nm Trans.
$282

Specifications

  • Diameter
    25.4 mm
  • Material
    UV Grade Fused Silica
  • Antireflection Coating
    V-coat AR, R <0.25% at transmittance band
  • Angle of Incidence
    45°
  • Reflection
    Ravg > 99.5%
  • Transmission
    Tavg>95%
  • Wavefront Distortion
    /4 at 632.8 nm over the clear aperture
  • Damage Threshold
    5.0 MW/cm2 CW, 5.0 J/cm2 with 0.1-100 nsec pulses @ 1064 nm, typical
  • Surface Flatness
    λ/10 at 632.8 nm over the clear aperture
  • Surface Quality
    10-5 scratch-dig
  • Durability
    MIL-C-675C, moderate abrasion million cycles
  • Chamfers
    0.25-0.76 mm face width
  • Chamfers Angle Tolerance
    45° ±15°
  • Cleaning
  • Clear Aperture
    > central 80% of diameter
  • Diameter Tolerance
    +0/-0.25 mm
  • Wedge
    ≤3 arc min
  • Thickness
    6.35 mm
  • Thickness Tolerance
    ±0.5 mm

Features

Nd:YAG Laser Harmonic Beamsplitters

These harmonic beamsplitters are designed to separate harmonic wavelengths of an Nd:YAG laser at 45° angle of incidence. They provide high reflection (>99.5%) and transmission (>95%) at specified wavelengths. A V-coat antireflection coating is applied on the back surface to minimize the loss due to reflection. Harmonic beamsplitters are sometimes called Harmonic Separators or Dichroic Filters.

UV Fused Silica Substrate

UV Grade Fused Silica is synthetic amorphous silicon dioxide of extremely high purity providing maximum transmission from 195 to 2100 nm. This non-crystalline, colorless silica glass combines a very low thermal expansion coefficient with good optical qualities and excellent transmittance in the ultraviolet region. Transmission and homogeneity exceed those of crystalline quartz without the problems of orientation and temperature instability inherent in the crystalline form. It will not fluoresce under UV light and is resistant to radiation. For high-energy applications, the extreme purity of fused silica eliminates microscopic defect sites that could lead to laser damage.

High Damage Threshold

High fluence Nd:YAG lasers may be used safely with these beamsplitters. Extra durable multilayer coatings are used for both the front beamsplitting surface, and the AR-coated back surface. This results in typical damage threshold at 1064 nm of 5 MW/cm2 for CW, 5 J/cm2 for 0.1–100 nsec pulses. Typical damage threshold at 532 nm is 2.5 MW/cm2 for CW, 2.5 J/cm2 for 0.1–100 nsec pulses.

Reflectance Outside the Design Wavelengths

Reflection and transmission at wavelengths other than the specified wavelengths are uncontrolled and can vary significantly from the curve shown. Use of beamsplitters outside the design wavelengths is not recommended.