Thorlabs FBH1550-12 Hard-Coated 1550nm Bandpass Filter Narrow FWHM=12nm, Ø25mm

Thorlabs FBH1550-12 Hard-Coated 1550nm Bandpass Filter Narrow FWHM=12nm, Ø25mm

  • Center Wavelength: 1550 nm
  • FWHM Bandwidth: 12 nm
  • Blocking Regions (Optical Density): 200-1530 nm, 1570-1700 nm (OD > 5)
  • Surface Quality: 60-40 Scratch-Dig
  • Mounted Thickness: 3.5 mm
  • Clear Aperture: 21.1 mm
  • Outer Diameter: 25 mm

Thorlabs' hard-coated bandpass filters, which are designed to provide enhanced isolation of key Yb:YAG, Nd:YLF, Nd:YAG, Tm:YAG, and diode laser lines, offer excellent suppression (ODabs > 4) in the blocking region while providing >90% transmission at the design wavelength. They are available with 12.5 mm or 25 mm outer diameters and are 3.5 mm thick, which allows the Ø25 mm filters to be used as drop-in replacements for our fluorescence emission filters.

The passbands of these filters range from 1 to 70 nm FWHM, depending on the center wavelength chosen, with steep cut-on and cut-off slopes. The center wavelength and passbands for these filters are specified for light normally incident on the surface. For angles of incidence (AOIs) greater than 0°, the band will shift toward a lower center wavelength and the shape of the pass band will change. Filters with passbands that have full width half maxima (FWHM) in the 1 to 5 nm range are particularly susceptible to these shifts. For more information, see the Tutorial tab.

These bandpass filters feature durable, hard-coated dielectric coatings on a UV fused silica substrate. The film construction is essentially a modified quarter-wave stack, using interference effects to isolate spectral bands. The coating is more dense than those on our standard bandpass filters, allowing them to be constructed using a single substrate, and yields a more stable, longer-lasting filter. The coating on these filters can withstand the normal cleaning and handling necessary when using any high-quality optical component.

Each filter is housed in a black anodized aluminum ring that is labeled with an arrow indicating the design propagation direction. The ring makes handling easier and enhances the blocking OD by limiting scattering. These filters can be mounted in our extensive line of filter mounts and wheels. As the mounts are not threaded, retaining rings will be required to mount the filters in one of our internally threaded lens tubes. We do not recommend removing the filter from its mount as the risk of damaging the filter is very high.

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Starlight Photonics Policies

About Us

We are a small company located in the heart of Silicon Valley. We specialize in surplus lasers and photonics and have an optics lab with many instruments such as power meters, laser diode drivers and optical spectrum analyzers. Combined with our considerable expertise, this allows us to test most of the items we sell so you can be confident that they will arrive in good working condition.

FDA Disclaimer for Laser Components This product is sold solely for use as a component (or replacement) in an electronic product; therefore it is not required to, and does not comply with, 21 CFR 1040.10 and 1040.11 which pertain to complete laser products. The manufacturer of the complete system-level electronic product is responsible for complying with 21 CFR 1040.10 and 1040.11 and for providing the user with all necessary safety warnings and information.

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Shipping

Most orders ship within 24 hours of payment. We take pride in our careful packing of delicate items. In the unlikely case that you receive an item which has been damaged in shipping, please hang on to the packing material and contact us. We will file a damage claim with the shipper and start the process of getting you a replacement or a refund.

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Items we sell on eBay do not include any warranty unless otherwise specifically stated in the listing. We do guarantee that the items we sell will be delivered in the condition described in the listing. If you have a problem with your purchase, please get in touch and we'll do our best to resolve it.

Return Policy

Most electronic items we sell may not be returned unless the package is unopened. Please read the listing carefully, do your research and ask us any questions you need to decide if the item is suitable for your use. All returns must include all of the original accessories, paperwork and packaging. Shipping charges are not refundable and opened packages will incur a fee to cover testing and restocking the item. Returns which are not resalable due to missing parts, damage, alteration, etc. will not be refunded.

International Sales

Import duties, taxes, and other charges are not included in the item price or shipping cost. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding or buying. 

Company Information

Starlight Photonics
PO Box 1134
Alviso, CA 95002