1550nm CWL, 25mm Dia., OD 4 Ultra Narrow Filter

Ultra Narrow Bandpass Filters

Ultra Narrow Bandpass Filters
Stock #12-514 3-4 days
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Diameter (mm):
Angle of Incidence (°):
Optical Density OD (Average):
Clear Aperture CA (mm):
Center Wavelength CWL (nm):
Full Width-Half Max FWHM (nm):
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Fused Silica (Corning 7980)
Minimum Transmission (%):
Hard Coated
Transmission (%):
Tabs >90% @ 1550.6nm
Bandpass Filter
Blocking Wavelength Range (nm):
900 - 1533, 1569 - 1650
Mounted in Black Anodized Ring
Mount Thickness (mm):
5.00 ±0.05
Filter Design: Multi-Cavity
Substrate Thickness (mm):

Regulatory Compliance

RoHS 2015:
Certificate of Conformance:
Reach 235:

Product Family Description

  • >90% Transmission at Design Wavelength
  • Up to >OD 8 Blocking Across Blocking Range
  • As Narrow as <0.5nm Full Width-Half Max

Ultra Narrow Hard Coated Bandpass Filters are ideal for use as laser line, laser cleanup, or laser excitation filters in demanding medical and laser applications. These hard coated narrowband filters are manufactured with state of the art plasma deposition processes, which ensure high resistance to laser damage and a high level of performance over a long period of time. Depending on the wavelength range and system requirements, these Ultra Narrow Hard Coated Bandpass Filters will provide up to 98% peak transmission, up to OD 10 blocking by design, center wavelength tolerances as tight a 0.05nm, FWHM bandwidths <1nm, and extremely steep edges with an ultra-flat passband profile. Typical applications for these ultra narrowband filters include fluorescence microscopy, flow cytometry, real time DNA sequencing, and polymerase chain reaction (PCR) diagnostic instruments.

Note: These filters are optimized for high spectral performance rather than high Laser Induced Damage Thresholds (LIDT). A typical LIDT for these filters is 1 J/cm2 @ 532nm, 10ns. Please contact us if you require a filter with a higher LIDT value.