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808 nm RazorEdge® ultrasteep long-pass edge filter

Part Number: LP02-808RU-25

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  • Your filter spectrum may differ slightly from the typical spectrum above, but is certified to meet the optical specifications noted below.
  • Note that the few % dip in transmission at about 1390 nm is a small absorption loss associated with a vibrational overtone of OH bonds in the fused silica substrate of this optical filter.
Semrock Optical Filter: LP02-808RU  LP02  808RU
808 nm RazorEdge® ultrasteep long-pass edge filter
RazorEdge filters allow you to see the weakest signals closer to the laser line, especially for Raman spectroscopy applications. With their deep laser-line blocking, ultrawide and low-ripple passbands, hard-coated reliability, and high laser damage threshold, they offer lasting performance and value.
Part NumberSizePrice1Stock StatusQuantity
LP02-808RU-2525 mm x 3.5 mm$795In StockAdd To Cart
LP02-808RU-5050 mm x 3.5 mm$2,255Ships in 2 daysAdd To Cart

Don’t see a size you need? Create your own custom sized part – available in less than a week.

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Custom Sizing Limits:
Diameter Range: 5mm - 50.8mm
Rectangular Dimensions: 5mm - 50.8mm

Substrate thickness/tolerance as listed on Specifications tab.
Dimensional tolerances are ±0.1mm for unhoused parts.

For sizes outside the limits listed above, please contact customer service at 1-866-SEMROCK



1) US domestic pricing only. If you are ordering from outside the US, please contact your nearest regional distributor for the correct list price.
Optical Specifications
SpecificationValue
Transmission Band 1Tavg > 93% 818.5 – 1822.6 nm
Edge Wavelength 1813.7 nm
Blocking Band 1ODabs > 6 808 nm
Blocking Band 2ODavg > 6 657 – 808 nm (typical)
Transition Width (nm)8.1 nm
Transition Width (cm-1)123 cm-1
Edge Steepness (%)0.5%
Edge Steepness (nm)4.0 nm
Edge Steepness (cm-1)61.6 cm-1

General Filter Specifications
SpecificationValue
Laser Wavelength 1808 nm
Angle of Incidence0 ± 2 degrees
Cone Half-angle5 degrees
Optical Damage Rating0.5 J/cm2 @ 266 nm (10 ns pulse width), 1 J/cm2 @ 532 nm (10 ns pulse width)
Filter Effective Index1.76 Understanding ‘Effective Index of Refraction’ neff

Physical Filter Specifications (applies to standard sized parts; contact us regarding other sizes)
SpecificationValue
Transverse Dimensions (Diameter)25 mm
Transverse Dimensions 2 (Diameter)50 mm
Transverse Tolerance (mounted)+ 0.0 / – 0.1 mm
Filter Thickness (Mounted)3.5 mm
Filter Thickness Tolerance (Mounted)± 0.1 mm
Clear Aperture≥ 22 mm
Clear Aperture 2≥ 45 mm
Scratch-Dig60-40
Substrate TypeFused Silica
Substrate Thickness (unmounted)2.0 mm
Substrate Thickness Tolerance (unmounted)± 0.1 mm
OrientationArrow on ring indicates preferred direction of propagation of light

Laser Clean-up Filters

LL01-808.png

808 nm MaxLine® laser clean-up filter

• Laser Wavelength = 808 nm
• Tabs > 90% 808 nm
• FWHM of 3.1 nm (typical); 5.7 nm (maximum)


Custom sizing available in less than a week (sizing fee applies).
Part # LL01-808-12.5
$305
(Non-US pricing info)


Edge Filters

LP02-808RE.png

808 nm RazorEdge® ultrasteep long-pass edge filter

• Laser Wavelength = 808 nm
• 62 cm-1 transition
• Tavg > 93% 813.3 – 1822.6 nm


Custom sizing available in less than a week (sizing fee applies).
Part # LP02-808RE-25
$1145
(Non-US pricing info)



BLP01-808R.png

808 nm EdgeBasic™ best-value long-pass edge filter

• Filter with 50% edge at 823 nm
• 302 cm-1 transition
• Tavg > 93% from 830.6 – 1600 nm


Custom sizing available in less than a week (sizing fee applies).
Part # BLP01-808R-25
$355
(Non-US pricing info)


[x]
US domestic pricing only. If you are ordering from outside the US, please contact your nearest regional distributor for the correct list price.
Tech Note
TopicDescription
Cleaning Optical FiltersInstructions for cleaning hard coated optical filters
Filter ReliabilityCompares the performance and reliability of hard coated filters to traditional soft-coated filters and provides information about the testing standards for Semrock filters
Measuring Light with Wavelengths & WavenumbersCompares units of wavelength to wavenumbers and provides formulas for calculating wavenumber shift
Laser Damage ThresholdProvides information for calculating laser damage threshold for pulsed and continuous wave lasers
Working with Optical DensityTables to describe the relationship between OD and transmission with tips for quickly calculating OD
Filter Spectra at Non-normal Angles of IncidenceDiscusses how angle tuning affects the spectral response of different types of filters.
Filter Types for Raman Spectroscopy ApplicationsCompares the performance of different combinations of LWP and SWP edge filters, notch and laser line filters for Raman applications
RazorEdge Filter LayoutsDescribes two different filter layouts that are commonly used in Raman applications
Transition Width & Edge SteepnessDescribes how measurements for edge steepness and transition width differ
Journal Article
TopicDescription
Thin-Film Filters for Raman SpectroscopyTuran Erdogan, PhD, and Victor Mizrahi, PhD, Semrock Inc., Spectroscopy, December 2004
Describes the types and functions of filters commonly used in Raman spectroscopy
Application
TopicDescription
Raman SpectroscopyAn overview of Raman spectroscopy, including solutions from Semrock and additional learning resources.

808 RazorEdge Ultrasteep Long pass Long-pass Longpass LWP Long-Wave-Pass U-Grade LP02-808RU 808RU LP02 RU LP02-808RU-25 LP02-808RU-50

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