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Ultrafast Beamsplitters
Substrate: Fused Silica
Diameter Tolerance (mm): +0.00/-0.10
Thickness (mm): 3.00 ±0.10
Clear Aperture (%): 80
Surface Quality: 10-5
Transmitted Wavefront Distortion @ 632.8nm: λ/8
Parallelism (arcmin): <10
Angle of Incidence (°): 45
• Designs for Ti:sapphire and Yb:doped Fiber Lasers
• 90:10, 70:30, and 50:50 (R:T) Split Ratios
• Controlled Reflection and Transmission GDD
TECHSPEC® Ultrafast Beamsplitters are designed for use with femtosecond pulsed Ti:sapphire and Yb:doped
fiber lasers. Their front surface features a 90:10, 70:30, or 50:50 (R:T) non-polarizing beamsplitter coating while
their back surface features an anti-reflective coating to minimize losses due to reflection. Each coating has
controlled dispersion to allow for predictable group delay dispersion (GDD) of the transmitted or reflected
pulses. TECHSPEC® Ultrafast Beamsplitters are available in standard imperial sizes for easy integration into
optical systems. Please contact us if your application requires an Ultrafast Beamsplitter with a custom size or
coating specifications. Note: The arrow on the edge of these optics points towards the beamsplitter coating.
TECHSPEC® Ultrafast Beamsplitters
Wavelength
Nd:YAG Harmonic Separators
Ultrafast Harmonic Separators
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Range
(nm)
Reflection/
Transmission
Ratio (R/T)
Group Delay Dispersion (GDD) 12.7mm Diameter 25.4mm Diameter
Transmission Reflectivity Stock No. Price Stock No. Price
650 - 1050 50/50 ±15 fs2 @
650 - 1100nm
±15 fs2 @
650 - 1100nm #13-833 £161.50 #13-834 £187.00
680 - 1020 70/30 ±15 fs2 @
700 - 1080nm
±20 fs2 @
700 - 1080nm #13-831 £161.50 #13-832 £187.00
715 - 980 90/10 ±65 fs2 @
715 - 980nm
±75 fs2 @
715 - 980nm #13-829 £178.50 #13-830 £204.00
• Used to Separate Nd:YAG Harmonic Wavelengths
• Beamsplitter Coating Features >95% Transmission
• λ/10 Fused Silica Substrate
TECHSPEC® Nd:YAG Harmonic Separators are used to separate the common harmonic wavelengths of an
Nd:YAG laser. A beamsplitter coating on the first surface reflects at least one wavelength and transmits another.
The second surface of the beamsplitter features an anti-reflective coating to minimize the loss due to reflection.
TECHSPEC Nd:YAG Harmonic Separators are designed for integration at 45° angle of incidence.
• Separates Ultrafast Harmonic Wavelengths
• Ultrafast Beamsplitter Coating with Low GDD
• <λ/10 Wavefront Distortion
TECHSPEC® Ultrafast Harmonic Separators, also known as Ultrafast Harmonic Beamsplitters, are used to reflect
the second or third harmonic of femtosecond lasers while transmitting the fundamental pulse. The reflective
surface is designed to have high reflectivity and a low Group Delay Dispersion (GDD) of ±20fs2 to minimize
pulse dispersion. The back surface is coated with an anti-reflection coating to enhance the transmission of the
fundamental light. TECHSPEC® Ultrafast Harmonic Separators provide low wavefront distortion and feature
high quality, thin UV fused silica substrates with 10-5 surface quality. Designs for separating the harmonics of
800nm and 1030nm (Ti:sapphire and Yb:doped fiber) lasers are available. Please contact us if your application
requires an Ultrafast Harmonic Separator designed for custom wavelengths.
Substrate: Fused Silica
Surface Quality: 10-5
Clear Aperture (%): >85
Parallelism (arcmin): <3
Surface Flatness (P-V): λ/10
Diameter Tolerance (mm): +0.00/-0.10
Thickness (mm): 6.35 ±0.20
Angle of Incidence (°): 45
Substrate: Fused Silica
Diameter Tolerance (mm): +0.00/-0.10
Thickness Tolerance (mm): ± 0.10
Parallelism (arcmin): <3
Group Delay Dispersion
(GDD) (fs2): 0 ±20 @ Reflection Wavelength
Surface Quality: 10-5
Surface Flatness: λ/8
Angle of Incidence (°): 45
Clear Aperture (%): 80
TECHSPEC® Nd:YAG Harmonic Separators
Reflected
Transmitted
DWL (nm)
DWL (nm)
Beamsplitter Coating 12.7mm Diameter 25.4mm Diameter
Rabs Tabs Stock No. Price Stock No. Price
266 355 >99% >95% #37-722 £191.25 #37-721 £256.70
266 532 and 1064 >95% >98% #11-545 £191.25 #11-546 £256.70
355 532 >99% >95% #37-720 £181.90 #37-719 £238.00
355 532 and 1064 >99% >95% #38-779 £181.90 #38-778 £238.00
532 355 >99% >95% #37-718 £181.90 #37-717 £238.00
532 1064 >99% >95% #37-716 £181.90 #37-715 £238.00
532 and 1064 266 >99% >70% #11-547 £191.25 #11-548 £256.70
532 and 1064 355 >99% >90% #38-781 £181.90 #38-780 £238.00
1064 532 >99% >95% #37-714 £181.90 #37-698 £238.00
TECHSPEC® Ultrafast Harmonic Separators
Reflection
Wavelength
(nm)
Transmission
Wavelength
(nm)
Diameter
(mm)
Thickness
(mm)
Coating Specification Stock
No.
Price
Front Surface Back Surface 1-3 4+
266 800 25.4 3.0 Ravg >98% @ 258 - 272nm
Tavg >98% @ 700 - 900nm
Ravg <1% @
700 - 900nm #12-662 £204.00
Call
343 1030 25.4 3.0 Ravg >99% @ 323 - 354nm
Tavg >98% @ 1000 - 1090nm
Ravg <0.8% @
1000 - 1090nm #12-664 £204.00
400 800 25.4 3.0 Ravg >99% @ 376 - 425nm
Tavg >98% @ 700 - 900nm
Ravg <1% @
700 - 900nm #12-661 £204.00
515 1030 25.4 3.0 Ravg >99.5% @ 505 - 535nm
Tavg >98% @ 1000 - 1090nm
Ravg <0.8% @
1000 - 1090nm #12-663 £204.00
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