Create an Account  |   Log In

View All »Matching Part Numbers


Your Shopping Cart is Empty
         

Premium Hard-Coated Bandpass Filters


  • Peak Transmission >90%
  • Pass Regions Between 4 nm and 40 nm FWHM
  • Ø12.5 mm and Ø25 mm Mounted Filters

FBH520-40

(Ø25 mm)

FLH05532-4

(Ø12.5 mm)

FBH650-40

(Ø25 mm)

FLH633-5

Arrow Points in the Direction of Transmission

Related Items


Please Wait
Comparison of Premium and Standard Bandpass Filters
Click to Enlarge

The plot above shows a comparison between one of our standard filters (Item # FL532-10) and one of our premium bandpass filters (Item # FLH532-10), which both have a CWL of 532 nm and FWHM of 10 nm. The cut on and cut off slopes, transmission, and blocking region optical density are higher for our premium filter.
Cleaning Tutorial

Features

  • Bandpass Filters with >90% Transmission at Center Wavelength
  • Excellent Suppression in Rejection Region (OD > 5)
  • 12.5 and 25 mm Outer Diameters Available
  • Transmission Direction Engraved on Edge
  • Center Wavelengths from 355 nm to 1550 nm
  • Custom Bandpass Filter Sizes are Available by Contacting Tech Support

Thorlabs' premium bandpass filters, which are designed to provide enhanced isolation of key Nd:YAG, HeNe, Ar, and diode laser lines, offer excellent (>5 OD) suppression in the blocking region while providing >90% transmission at the design wavelength. The pass bands of these filters range from 4 to 40 nm FWHM, depending on the center wavelength chosen.

Our premium bandpass filters provide better transmission, steeper cut on and cut off slopes, greater blocking, and increased durability when compared to our standard line of bandpass filters (see the Specs tab for comparison). They are available with 12.5 mm or 25 mm outer diameters. The filters are 3.5 mm thick, which allows the Ø25 mm filters to be used as drop-in replacements for our fluorescence emission filters.

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.

Additional Bandpass Filters
UV/Visible Bandpass Filters
340 - 694.3 nm CWLs
NIR Bandpass Filters
700 - 1650 nm CWLs
MIR Bandpass Filters
1750 - 9500 nm CWLs
Premium Bandpass Filters
355 - 1550 nm CWLs
Bandpass Filter Kits
We also offer custom bandpass filters with other central wavelengths or FWHM. To request a quote, contact Tech Support.
General Specifications
Specification Premium Bandpass Filters Standard Bandpass Filters
(For Comparison Purposes)
Transmission >90% at Center Wavelength >60% at Center Wavelength
Out of Band
Optical Density
(Transmission)
OD > 5
(<0.001%)
OD > 4
(<0.01%)
Angle of Incidence
Housing Diameter 12.5 mm or 25 mm 1/2" or 1"
Clear Aperture Ø10.0 mm for Ø12.5 mm
Ø21.1 mm for Ø25 mm
Ø8.6 mm (Min) for Ø1/2"
Ø21 mm (Min) for Ø1"
Mounted Thickness 3.5 mm <6.3 mm
Surface Quality 60-40 Scratch-Dig 80-50 Scratch-Dig
Coating Hard Coated Immersed Dielectric
Operating
Temperature
-40 to 90°Ca -50 to 80 °C
Edge Treatment Mounted in Black
Anodized Aluminum Ring
Mounted in Black
Anodized Aluminum Ring
Edge Markingsb Item # Item #, CWL-FWHM (UV, VIS, NIR)
Item # (IR)
Substrate(s) UV Fused Silicac Schott Borofloat and Soda Lime
Damage Thresholdd Item # FLH1064-10:
Pulsed, 2 J/cm2
(1064 nm, 10 ns, 10 Hz, Ø1.020 mm)
Not Specified
  • Operating temperature is limited by the epoxy. Please contact Tech Support if your application involves temperatures outside of this range.
  • The engraved arrow points in the direction of light transmission.
  • Click to view detailed substrate specifications.
  • The damage threshold is only specified for the FLH1064-10 filter and is not currently available for other items.
Transmission Comparison
Center
Wavelength
Premium Filtera
Item #
Equivalent Standard Filtera
Item #
Transmission
Comparisonb
355 nm FLH355-10 FL355-10 More Info
400 nm FBH400-40 FB400-40 More Info
405 nm FBH405-10 FB405-10 More Info
450 nm FBH450-10 FB450-10 More Info
520 nm FBH520-10 FB520-10 More Info
532 nm FLH05532-4 (Ø1/2")
FLH532-4 (Ø1")
FL532-3 More Info
532 nm FLH532-10 FL532-10 More Info
633 nm FLH05633-5 (Ø1/2")
FLH633-5 (Ø1")
FL632.8-3 More Info
635 nm FLH635-10 FL635-10 More Info
650 nm FBH650-10 FB650-10 More Info
650 nm FBH650-40 FB650-40 More Info
660 nm FBH660-10 FB660-10 More Info
780 nm FBH780-10 FB780-10 More Info
800 nm FBH800-10 FB800-10 More Info
800 nm FBH800-40 FB800-40 More Info
810 nm FBH810-10 FB810-10 More Info
850 nm FBH850-10 FL850-10 More Info
850 nm FBH850-40 FB850-40 More Info
1064 nm FLH051064-8 (Ø1/2")
FLH1064-8 (Ø1")
FL1064-10 More Info
1064 nm FLH1064-10 FL1064-10 More Info
1030 nm FLH1030-10 N/A N/A
1070 nm FBH1070-10 FB1070-10 More Info
1200 nm FBH1200-10 FB1200-10 More Info
1550 nm FBH1550-12 FB1550-12 More Info
  • Each premium filter is compared with its closest equivalent standard filter. Filter diameters are 25 mm or 1" unless otherwise noted. Please note that the bandpass regions vary slightly between items, and the FLH633-5 filter is compared to a filter with a specified center wavelength of 632.8 nm.
  • Please keep in mind that the data given is typical, and performance may vary from lot to lot.
Damage Threshold Specifications
Item # Damage Threshold
FLH1064-10 Pulsed: 2 J/cm(1064 nm, 10 ns, 10 Hz, Ø1.020 mm)

Damage Threshold Data for Thorlabs' Premium Bandpass Filters

The specifications to the right are measured data for a selection of Thorlabs' premium bandpass filters.

 

Laser Induced Damage Threshold Tutorial

The following is a general overview of how laser induced damage thresholds are measured and how the values may be utilized in determining the appropriateness of an optic for a given application. When choosing optics, it is important to understand the Laser Induced Damage Threshold (LIDT) of the optics being used. The LIDT for an optic greatly depends on the type of laser you are using. Continuous wave (CW) lasers typically cause damage from thermal effects (absorption either in the coating or in the substrate). Pulsed lasers, on the other hand, often strip electrons from the lattice structure of an optic before causing thermal damage. Note that the guideline presented here assumes room temperature operation and optics in new condition (i.e., within scratch-dig spec, surface free of contamination, etc.). Because dust or other particles on the surface of an optic can cause damage at lower thresholds, we recommend keeping surfaces clean and free of debris. For more information on cleaning optics, please see our Optics Cleaning tutorial.

Testing Method

Thorlabs' LIDT testing is done in compliance with ISO/DIS 11254 and ISO 21254 specifications.

First, a low-power/energy beam is directed to the optic under test. The optic is exposed in 10 locations to this laser beam for 30 seconds (CW) or for a number of pulses (pulse repetition frequency specified). After exposure, the optic is examined by a microscope (~100X magnification) for any visible damage. The number of locations that are damaged at a particular power/energy level is recorded. Next, the power/energy is either increased or decreased and the optic is exposed at 10 new locations. This process is repeated until damage is observed. The damage threshold is then assigned to be the highest power/energy that the optic can withstand without causing damage. A histogram such as that below represents the testing of one BB1-E02 mirror.

LIDT metallic mirror
The photograph above is a protected aluminum-coated mirror after LIDT testing. In this particular test, it handled 0.43 J/cm2 (1064 nm, 10 ns pulse, 10 Hz, Ø1.000 mm) before damage.
LIDT BB1-E02
Example Test Data
Fluence # of Tested Locations Locations with Damage Locations Without Damage
1.50 J/cm2 10 0 10
1.75 J/cm2 10 0 10
2.00 J/cm2 10 0 10
2.25 J/cm2 10 1 9
3.00 J/cm2 10 1 9
5.00 J/cm2 10 9 1

According to the test, the damage threshold of the mirror was 2.00 J/cm2 (532 nm, 10 ns pulse, 10 Hz, Ø0.803 mm). Please keep in mind that these tests are performed on clean optics, as dirt and contamination can significantly lower the damage threshold of a component. While the test results are only representative of one coating run, Thorlabs specifies damage threshold values that account for coating variances.

Continuous Wave and Long-Pulse Lasers

When an optic is damaged by a continuous wave (CW) laser, it is usually due to the melting of the surface as a result of absorbing the laser's energy or damage to the optical coating (antireflection) [1]. Pulsed lasers with pulse lengths longer than 1 µs can be treated as CW lasers for LIDT discussions.

When pulse lengths are between 1 ns and 1 µs, laser-induced damage can occur either because of absorption or a dielectric breakdown (therefore, a user must check both CW and pulsed LIDT). Absorption is either due to an intrinsic property of the optic or due to surface irregularities; thus LIDT values are only valid for optics meeting or exceeding the surface quality specifications given by a manufacturer. While many optics can handle high power CW lasers, cemented (e.g., achromatic doublets) or highly absorptive (e.g., ND filters) optics tend to have lower CW damage thresholds. These lower thresholds are due to absorption or scattering in the cement or metal coating.

Linear Power Density Scaling

LIDT in linear power density vs. pulse length and spot size. For long pulses to CW, linear power density becomes a constant with spot size. This graph was obtained from [1].

Intensity Distribution

Pulsed lasers with high pulse repetition frequencies (PRF) may behave similarly to CW beams. Unfortunately, this is highly dependent on factors such as absorption and thermal diffusivity, so there is no reliable method for determining when a high PRF laser will damage an optic due to thermal effects. For beams with a high PRF both the average and peak powers must be compared to the equivalent CW power. Additionally, for highly transparent materials, there is little to no drop in the LIDT with increasing PRF.

In order to use the specified CW damage threshold of an optic, it is necessary to know the following:

  1. Wavelength of your laser
  2. Beam diameter of your beam (1/e2)
  3. Approximate intensity profile of your beam (e.g., Gaussian)
  4. Linear power density of your beam (total power divided by 1/e2 beam diameter)

Thorlabs expresses LIDT for CW lasers as a linear power density measured in W/cm. In this regime, the LIDT given as a linear power density can be applied to any beam diameter; one does not need to compute an adjusted LIDT to adjust for changes in spot size, as demonstrated by the graph to the right. Average linear power density can be calculated using the equation below. 

The calculation above assumes a uniform beam intensity profile. You must now consider hotspots in the beam or other non-uniform intensity profiles and roughly calculate a maximum power density. For reference, a Gaussian beam typically has a maximum power density that is twice that of the uniform beam (see lower right).

Now compare the maximum power density to that which is specified as the LIDT for the optic. If the optic was tested at a wavelength other than your operating wavelength, the damage threshold must be scaled appropriately. A good rule of thumb is that the damage threshold has a linear relationship with wavelength such that as you move to shorter wavelengths, the damage threshold decreases (i.e., a LIDT of 10 W/cm at 1310 nm scales to 5 W/cm at 655 nm):

CW Wavelength Scaling

While this rule of thumb provides a general trend, it is not a quantitative analysis of LIDT vs wavelength. In CW applications, for instance, damage scales more strongly with absorption in the coating and substrate, which does not necessarily scale well with wavelength. While the above procedure provides a good rule of thumb for LIDT values, please contact Tech Support if your wavelength is different from the specified LIDT wavelength. If your power density is less than the adjusted LIDT of the optic, then the optic should work for your application. 

Please note that we have a buffer built in between the specified damage thresholds online and the tests which we have done, which accommodates variation between batches. Upon request, we can provide individual test information and a testing certificate. The damage analysis will be carried out on a similar optic (customer's optic will not be damaged). Testing may result in additional costs or lead times. Contact Tech Support for more information.

Pulsed Lasers

As previously stated, pulsed lasers typically induce a different type of damage to the optic than CW lasers. Pulsed lasers often do not heat the optic enough to damage it; instead, pulsed lasers produce strong electric fields capable of inducing dielectric breakdown in the material. Unfortunately, it can be very difficult to compare the LIDT specification of an optic to your laser. There are multiple regimes in which a pulsed laser can damage an optic and this is based on the laser's pulse length. The highlighted columns in the table below outline the relevant pulse lengths for our specified LIDT values.

Pulses shorter than 10-9 s cannot be compared to our specified LIDT values with much reliability. In this ultra-short-pulse regime various mechanics, such as multiphoton-avalanche ionization, take over as the predominate damage mechanism [2]. In contrast, pulses between 10-7 s and 10-4 s may cause damage to an optic either because of dielectric breakdown or thermal effects. This means that both CW and pulsed damage thresholds must be compared to the laser beam to determine whether the optic is suitable for your application.

Pulse Duration t < 10-9 s 10-9 < t < 10-7 s 10-7 < t < 10-4 s t > 10-4 s
Damage Mechanism Avalanche Ionization Dielectric Breakdown Dielectric Breakdown or Thermal Thermal
Relevant Damage Specification No Comparison (See Above) Pulsed Pulsed and CW CW

When comparing an LIDT specified for a pulsed laser to your laser, it is essential to know the following:

Energy Density Scaling

LIDT in energy density vs. pulse length and spot size. For short pulses, energy density becomes a constant with spot size. This graph was obtained from [1].

  1. Wavelength of your laser
  2. Energy density of your beam (total energy divided by 1/e2 area)
  3. Pulse length of your laser
  4. Pulse repetition frequency (prf) of your laser
  5. Beam diameter of your laser (1/e2 )
  6. Approximate intensity profile of your beam (e.g., Gaussian)

The energy density of your beam should be calculated in terms of J/cm2. The graph to the right shows why expressing the LIDT as an energy density provides the best metric for short pulse sources. In this regime, the LIDT given as an energy density can be applied to any beam diameter; one does not need to compute an adjusted LIDT to adjust for changes in spot size. This calculation assumes a uniform beam intensity profile. You must now adjust this energy density to account for hotspots or other nonuniform intensity profiles and roughly calculate a maximum energy density. For reference a Gaussian beam typically has a maximum energy density that is twice that of the 1/e2 beam.

Now compare the maximum energy density to that which is specified as the LIDT for the optic. If the optic was tested at a wavelength other than your operating wavelength, the damage threshold must be scaled appropriately [3]. A good rule of thumb is that the damage threshold has an inverse square root relationship with wavelength such that as you move to shorter wavelengths, the damage threshold decreases (i.e., a LIDT of 1 J/cm2 at 1064 nm scales to 0.7 J/cm2 at 532 nm):

Pulse Wavelength Scaling

You now have a wavelength-adjusted energy density, which you will use in the following step.

Beam diameter is also important to know when comparing damage thresholds. While the LIDT, when expressed in units of J/cm², scales independently of spot size; large beam sizes are more likely to illuminate a larger number of defects which can lead to greater variances in the LIDT [4]. For data presented here, a <1 mm beam size was used to measure the LIDT. For beams sizes greater than 5 mm, the LIDT (J/cm2) will not scale independently of beam diameter due to the larger size beam exposing more defects.

The pulse length must now be compensated for. The longer the pulse duration, the more energy the optic can handle. For pulse widths between 1 - 100 ns, an approximation is as follows:

Pulse Length Scaling

Use this formula to calculate the Adjusted LIDT for an optic based on your pulse length. If your maximum energy density is less than this adjusted LIDT maximum energy density, then the optic should be suitable for your application. Keep in mind that this calculation is only used for pulses between 10-9 s and 10-7 s. For pulses between 10-7 s and 10-4 s, the CW LIDT must also be checked before deeming the optic appropriate for your application.

Please note that we have a buffer built in between the specified damage thresholds online and the tests which we have done, which accommodates variation between batches. Upon request, we can provide individual test information and a testing certificate. Contact Tech Support for more information.


[1] R. M. Wood, Optics and Laser Tech. 29, 517 (1998).
[2] Roger M. Wood, Laser-Induced Damage of Optical Materials (Institute of Physics Publishing, Philadelphia, PA, 2003).
[3] C. W. Carr et al., Phys. Rev. Lett. 91, 127402 (2003).
[4] N. Bloembergen, Appl. Opt. 12, 661 (1973).

In order to illustrate the process of determining whether a given laser system will damage an optic, a number of example calculations of laser induced damage threshold are given below. For assistance with performing similar calculations, we provide a spreadsheet calculator that can be downloaded by clicking the button to the right. To use the calculator, enter the specified LIDT value of the optic under consideration and the relevant parameters of your laser system in the green boxes. The spreadsheet will then calculate a linear power density for CW and pulsed systems, as well as an energy density value for pulsed systems. These values are used to calculate adjusted, scaled LIDT values for the optics based on accepted scaling laws. This calculator assumes a Gaussian beam profile, so a correction factor must be introduced for other beam shapes (uniform, etc.). The LIDT scaling laws are determined from empirical relationships; their accuracy is not guaranteed. Remember that absorption by optics or coatings can significantly reduce LIDT in some spectral regions. These LIDT values are not valid for ultrashort pulses less than one nanosecond in duration.

Intensity Distribution
A Gaussian beam profile has about twice the maximum intensity of a uniform beam profile.

CW Laser Example
Suppose that a CW laser system at 1319 nm produces a 0.5 W Gaussian beam that has a 1/e2 diameter of 10 mm. A naive calculation of the average linear power density of this beam would yield a value of 0.5 W/cm, given by the total power divided by the beam diameter:

CW Wavelength Scaling

However, the maximum power density of a Gaussian beam is about twice the maximum power density of a uniform beam, as shown in the graph to the right. Therefore, a more accurate determination of the maximum linear power density of the system is 1 W/cm.

An AC127-030-C achromatic doublet lens has a specified CW LIDT of 350 W/cm, as tested at 1550 nm. CW damage threshold values typically scale directly with the wavelength of the laser source, so this yields an adjusted LIDT value:

CW Wavelength Scaling

The adjusted LIDT value of 350 W/cm x (1319 nm / 1550 nm) = 298 W/cm is significantly higher than the calculated maximum linear power density of the laser system, so it would be safe to use this doublet lens for this application.

Pulsed Nanosecond Laser Example: Scaling for Different Pulse Durations
Suppose that a pulsed Nd:YAG laser system is frequency tripled to produce a 10 Hz output, consisting of 2 ns output pulses at 355 nm, each with 1 J of energy, in a Gaussian beam with a 1.9 cm beam diameter (1/e2). The average energy density of each pulse is found by dividing the pulse energy by the beam area:

Pulse Energy Density

As described above, the maximum energy density of a Gaussian beam is about twice the average energy density. So, the maximum energy density of this beam is ~0.7 J/cm2.

The energy density of the beam can be compared to the LIDT values of 1 J/cm2 and 3.5 J/cm2 for a BB1-E01 broadband dielectric mirror and an NB1-K08 Nd:YAG laser line mirror, respectively. Both of these LIDT values, while measured at 355 nm, were determined with a 10 ns pulsed laser at 10 Hz. Therefore, an adjustment must be applied for the shorter pulse duration of the system under consideration. As described on the previous tab, LIDT values in the nanosecond pulse regime scale with the square root of the laser pulse duration:

Pulse Length Scaling

This adjustment factor results in LIDT values of 0.45 J/cm2 for the BB1-E01 broadband mirror and 1.6 J/cm2 for the Nd:YAG laser line mirror, which are to be compared with the 0.7 J/cm2 maximum energy density of the beam. While the broadband mirror would likely be damaged by the laser, the more specialized laser line mirror is appropriate for use with this system.

Pulsed Nanosecond Laser Example: Scaling for Different Wavelengths
Suppose that a pulsed laser system emits 10 ns pulses at 2.5 Hz, each with 100 mJ of energy at 1064 nm in a 16 mm diameter beam (1/e2) that must be attenuated with a neutral density filter. For a Gaussian output, these specifications result in a maximum energy density of 0.1 J/cm2. The damage threshold of an NDUV10A Ø25 mm, OD 1.0, reflective neutral density filter is 0.05 J/cm2 for 10 ns pulses at 355 nm, while the damage threshold of the similar NE10A absorptive filter is 10 J/cm2 for 10 ns pulses at 532 nm. As described on the previous tab, the LIDT value of an optic scales with the square root of the wavelength in the nanosecond pulse regime:

Pulse Wavelength Scaling

This scaling gives adjusted LIDT values of 0.08 J/cm2 for the reflective filter and 14 J/cm2 for the absorptive filter. In this case, the absorptive filter is the best choice in order to avoid optical damage.

Pulsed Microsecond Laser Example
Consider a laser system that produces 1 µs pulses, each containing 150 µJ of energy at a repetition rate of 50 kHz, resulting in a relatively high duty cycle of 5%. This system falls somewhere between the regimes of CW and pulsed laser induced damage, and could potentially damage an optic by mechanisms associated with either regime. As a result, both CW and pulsed LIDT values must be compared to the properties of the laser system to ensure safe operation.

If this relatively long-pulse laser emits a Gaussian 12.7 mm diameter beam (1/e2) at 980 nm, then the resulting output has a linear power density of 5.9 W/cm and an energy density of 1.2 x 10-4 J/cm2 per pulse. This can be compared to the LIDT values for a WPQ10E-980 polymer zero-order quarter-wave plate, which are 5 W/cm for CW radiation at 810 nm and 5 J/cm2 for a 10 ns pulse at 810 nm. As before, the CW LIDT of the optic scales linearly with the laser wavelength, resulting in an adjusted CW value of 6 W/cm at 980 nm. On the other hand, the pulsed LIDT scales with the square root of the laser wavelength and the square root of the pulse duration, resulting in an adjusted value of 55 J/cm2 for a 1 µs pulse at 980 nm. The pulsed LIDT of the optic is significantly greater than the energy density of the laser pulse, so individual pulses will not damage the wave plate. However, the large average linear power density of the laser system may cause thermal damage to the optic, much like a high-power CW beam.


Posted Comments:
Genaro Saavedra  (posted 2019-11-08 13:53:22.34)
We will be interested in a quotation for a filter with >90% transmission at central wavelength 565 nm and FWHM<=10 nm
nbayconich  (posted 2019-11-08 02:13:05.0)
Thank you for contacting Thorlabs. I will reach out to you directly to discuss our custom capabilities. For future custom requests please contact Tech Support directly at techsupport@thorlabs.com or select the "Request Quote" option above.
cpinyan  (posted 2019-01-30 15:51:10.907)
I would like one for 375nm he other version has very low transmission
YLohia  (posted 2019-01-31 09:33:56.0)
Hello, thank you for your feedback. We will post this on our internal product engineering forum for further consideration.
awesley  (posted 2018-08-06 03:40:47.033)
I'm looking for a filter that can be used on an F/4 telescope and have good narrowband transmission at 1010nm. The 1030-10 filter might be suitable given the F/4 characteristic will move the CWL but I can also mount the filter at a small tilt if this is needed to maximise the throughput at 1010nm. I need to know some specifics abt the filter, ie refractive index etc to calculate this, can someone plz get in touch. Best regards.
YLohia  (posted 2018-08-06 04:37:22.0)
Hello, thank you for contacting Thorlabs. The substrate for this filter is UV Fused Silica, which has an index of refraction of 1.4503 at 1010nm.
dmitry.busko  (posted 2018-07-06 13:50:01.51)
Is it possible to produce bandpass filter for a deeper UV region with a reasonable transmission (70-100%) ? We are interested in the band-pass for 300nm to clean-up the emission of 300nm LED (M300L4). Thank you.
YLohia  (posted 2018-07-06 10:37:08.0)
Hello, thank you for contacting Thorlabs. I will reach out to you directly regarding the possibility of offering this.
user  (posted 2018-01-10 16:06:25.803)
What's the expected lifetime of this type of filters?
nbayconich  (posted 2018-02-23 10:16:23.0)
Thank you for contacting Thorlabs. We do not have an expected lifetime for these hard coated dielectric filters but we do offer a two year warranty for them. The performance should not deteriorate if used properly in standard laboratory conditions and not in a field environment where the optics could be exposed to harsh elements such as moisture, dramatic temperature change etc. I will reach out to you directly to discuss your application.
user  (posted 2017-10-31 23:20:47.223)
I am looking for a filter which can block 795 nm and pass 780 nm wavelength. Is FBH780-10 will be useful for these purpose? Do these filters have any polarization dependency? If I send a s-polarized 780 nm beam and circular polarized 795 nm beam then is there any leakage of 795 nm beam?
tfrisch  (posted 2017-12-19 04:31:20.0)
Hello, thank you for contacting Thorlabs. FBH780-10 is designed for normal incidence at which there is nothing to discern S from P polarization. Even at small angles, I would not expect a large dependence on polarization state. As for the wavelength performance, blocking regions for FBH780-10 are 200-752nm and 808-1200nm. Though nominally, 795nm is not within this blocking region many production lots still have quite high extinction of the wavelength (see the raw data of the OD plot). You may be able to angle tune the filter increase the extinction. Please reach out to me at TechSupport@Thorlabs.com to discuss this in greater detail.
davidberryrieser  (posted 2016-11-15 16:08:14.827)
I would love to see one of the premium bandpass filters available for use at 671. The FWHM isn't that important. Thanks, David
tfrisch  (posted 2016-11-18 09:21:08.0)
Hello, thank you for contacting Thorlabs. I have reached out to you directly, but I also want to point out that FL670-10 is a soft-coat filter with the nearest CWL.
ludoangot  (posted 2016-07-28 13:00:07.24)
I am looking for a bandpass filter with similar (impressive) specs as your premium line of BP filters but lower down in the UV. Since the substrate you use is fused silica, can you manufacture a BP filter with center wavelength at 385nm with 40nm BW? If this has to be custom made, how much would it cost?
elkeneu  (posted 2015-04-15 16:21:24.89)
Suggestion for a bandpass filter: A new often used emitter system is the so called nitrogen vacancy center in diamond. It is now used in lots of sensing, labeling and imaging applications. It is very hard to find a bandpass filter to transmit its broadband fluorescence between 640 and 770 nm. such a filter would be highly useful in your premium filters line.
besembeson  (posted 2015-04-21 10:48:46.0)
Response from Bweh at Thorlabs USA: Thanks for your interesting suggestion regarding such a filter. It would certainly be a good addition to this product line. Our Optics division will consider if we can develop such an optic. It will probably not be available short-term though.
gedge  (posted 2015-02-03 14:29:48.85)
I am looking for a bandpass filter similar to this one, but with a center wavelength in the range of 767nm-770nm (we are performing atomic physics with Potassium). Is it very expensive to create a 'premium' version of one of your 770nm bandpass filters (FB770-10)? Thanks for your time, Graham Edge Graduate Researcher University of Toronto, Department of Physics
besembeson  (posted 2015-02-12 01:24:48.0)
Response from Bweh at Thorlabs USA: We can provide custom versions of these premium bandpass filters. I will followup with you by email regarding the quoting possibility.
ilovecrazydog  (posted 2013-09-27 08:51:16.023)
How much damage threshold can be expected for premium bandpass filter?
tcohen  (posted 2013-10-03 12:37:00.0)
Response from Tim at Thorlabs: These will have a higher LIDT threshold over our standard immersed dielectric bandpass filters but we do not yet have an experimental data set. As it will vary with the light source and the amount in the pass/rejection band as well as the general operating beam parameters (frequency, pulse duration) we would like to discuss your beam parameters. I see that you haven’t left us any contact information, so please contact us at techsupport@thorlabs.com so we can discuss this in more detail.

Ø12.5 mm Hard-Coated Bandpass Filters

Item #a Center Wavelength
(Transmission > 90%)
Bandwidth
(FWHM)
Blocking Regions
(OD > 5)
Transmission
Datab
TWEc Mounted
Thickness
Clear
Aperture
Surface
Quality
FLH05532-4 532 nm 4 nm 200 - 512 nm, 552 -1200 nm info λ/4 3.5 mm Ø10 mm 60-40
Scratch-Dig
FLH05633-5 633 nm 5 nm 200 - 613 nm, 653 - 1200 nm info
FLH051064-8 1064 nm 8 nm 200 - 1039 nm, 1089 - 1200 nm info
  • All specifications are valid for AOI = 0°.
  • Click on More Info Icon for a plot and downloadable data. Please note that transmission is only guaranteed for the specified center wavelength and that the data in the plots is typical. Performance may vary from lot to lot.
  • Transmitted Wavefront Error (RMS) @ 632.8 nm Over the Clear Aperture
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
FLH05532-4 Support Documentation
FLH05532-4Premium Bandpass Filter, Ø12.5 mm, CWL = 532 nm, FWHM = 4 nm
$143.92
Today
FLH05633-5 Support Documentation
FLH05633-5Premium Bandpass Filter, Ø12.5 mm, CWL = 633 nm, FWHM = 5 nm
$143.92
Today
FLH051064-8 Support Documentation
FLH051064-8Premium Bandpass Filter, Ø12.5 mm, CWL = 1064 nm, FWHM = 8 nm
$143.92
Today

Ø25 mm Hard-Coated Bandpass Filters

Item #a Center Wavelength
(Transmission > 90%)
Bandwidth
(FWHM)
Blocking Regions
(OD > 5)
Transmission
Datab
TWEc Mounted
Thickness
Clear
Aperture
Surface
Quality
FLH355-10 355 nm 10 nm 200 - 355 nm, 375 - 1200 nm info λ/4d 3.5 mm Ø21.1 mm 60-40
Scratch-Dig
FBH400-40 400 nm 40 nm 200 - 368 nm, 433 - 1200 nm info λ/2
FBH405-10 405 nm 10 nm 200 - 388 nm, 422 - 1200 nm info λ/2
FBH450-10 450 nm 10 nm 200 - 430 nm, 470 - 1200 nm info λ/4d
FBH520-10 520 nm 10 nm 200 - 500 nm, 540 - 1200 nm info λ/4d
FBH520-40 520 nm 40 nm 200 - 485 nm, 556 - 1200 nm info λ/2
FLH532-4 532 nm 4 nm 200 - 512 nm, 552 - 1200 nm info λ/4
FLH532-10 532 nm 10 nm 200 - 512 nm, 552 - 1200 nm info λ/4d
FLH633-5 633 nm 5 nm 200 - 613 nm, 653 - 1200 nm info λ/4
FLH635-10 635 nm 10 nm 200 - 615 nm, 655 - 1200 nm info λ/4d
FBH650-10 650 nm 10 nm 200 - 630 nm, 670 - 1200 nm info λ/4d
FBH650-40 650 nm 40 nm 200 - 611 nm, 690 - 1200 nm info λ/2
FBH660-10 660 nm 10 nm 200 - 648 nm, 672 - 1200 nm info λ/2
FBH780-10 780 nm 10 nm 200 - 752 nm, 808 - 1200 nm info λ/2
FBH800-10 800 nm 10 nm 200 - 771 nm, 829 - 1200 nm info λ/2
FBH800-40 800 nm 40 nm 200 - 757 nm, 845 - 1200 nm info λ/2
FBH810-10 810 nm 10 nm 200 - 781 nm, 839 - 1200 nm info λ/2
FBH850-10 850 nm 10 nm 200 - 830 nm, 870 - 1200 nm info λ/4d
FBH850-40 850 nm 40 nm 200 - 805 nm, 896 - 1200 nm info λ/2
FLH1030-10 1030 nm 10 nm 200 - 1010 nm, 1050 - 1200 nm info λ/4d
FLH1064-8 1064 nm 8 nm 200 - 1039 nm, 1089 - 1200 nm info λ/4
FLH1064-10e 1064 nm 10 nm 200 - 1044 nm, 1084 - 1200 nm info λ/4d
FBH1070-10 1070 nm 10 nm 200 - 1050 nm, 1090 - 1200 nm info λ/4
FBH1200-10 1200 nm 10 nm 200 - 1180 nm, 1220 - 1700 nm info λ/4d
FBH1550-12 1550 nm 12 nm 200 - 1530 nm, 1570 - 1700 nm info λ/4d
  • All specifications are valid for AOI = 0°.
  • Click on More Info Icon for a plot and downloadable data. Please note that transmission is only guaranteed for the specified center wavelength and that the data in the plots is typical. Performance may vary from lot to lot.
  • Transmitted Wavefront Error (RMS). Specified at 632.8 nm over the clear aperture unless otherwise noted.
  • Specified at the CWL over the clear aperture.
  • Damage Threshold: 2 J/cm2 (1064 nm, 10 ns, 10 Hz, Ø1.020 mm)
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
FLH355-10 Support Documentation
FLH355-10Customer Inspired! Premium Bandpass Filter, Ø25 mm, CWL = 355 nm, FWHM = 10 nm
$177.47
Today
FBH400-40 Support Documentation
FBH400-40Customer Inspired! Premium Bandpass Filter, Ø25 mm, CWL = 400 nm, FWHM = 40 nm
$177.47
Today
FBH405-10 Support Documentation
FBH405-10Customer Inspired! Premium Bandpass Filter, Ø25 mm, CWL = 405 nm, FWHM = 10 nm
$177.47
Today
FBH450-10 Support Documentation
FBH450-10Customer Inspired! Premium Bandpass Filter, Ø25 mm, CWL = 450 nm, FWHM = 10 nm
$177.47
Today
FBH520-10 Support Documentation
FBH520-10Customer Inspired! Premium Bandpass Filter, Ø25 mm, CWL = 520 nm, FWHM = 10 nm
$177.47
Today
FBH520-40 Support Documentation
FBH520-40Customer Inspired! Premium Bandpass Filter, Ø25 mm, CWL = 520 nm, FWHM = 40 nm
$177.47
Today
FLH532-4 Support Documentation
FLH532-4Premium Bandpass Filter, Ø25 mm, CWL = 532 nm, FWHM = 4 nm
$177.47
Today
FLH532-10 Support Documentation
FLH532-10Customer Inspired! Premium Bandpass Filter, Ø25 mm, CWL = 532 nm, FWHM = 10 nm
$177.47
Today
FLH633-5 Support Documentation
FLH633-5Premium Bandpass Filter, Ø25 mm, CWL = 633 nm, FWHM = 5 nm
$177.47
Today
FLH635-10 Support Documentation
FLH635-10Customer Inspired! Premium Bandpass Filter, Ø25 mm, CWL = 635 nm, FWHM = 10 nm
$177.47
Today
FBH650-10 Support Documentation
FBH650-10Customer Inspired! Premium Bandpass Filter, Ø25 mm, CWL = 650 nm, FWHM = 10 nm
$177.47
Today
FBH650-40 Support Documentation
FBH650-40Customer Inspired! Premium Bandpass Filter, Ø25 mm, CWL = 650 nm, FWHM = 40 nm
$177.47
Today
FBH660-10 Support Documentation
FBH660-10Customer Inspired! Premium Bandpass Filter, Ø25 mm, CWL = 660 nm, FWHM = 10 nm
$177.47
Today
FBH780-10 Support Documentation
FBH780-10Customer Inspired! Premium Bandpass Filter, Ø25 mm, CWL = 780 nm, FWHM = 10 nm
$177.47
Today
FBH800-10 Support Documentation
FBH800-10Customer Inspired! Premium Bandpass Filter, Ø25 mm, CWL = 800 nm, FWHM = 10 nm
$177.47
Today
FBH800-40 Support Documentation
FBH800-40Customer Inspired! Premium Bandpass Filter, Ø25 mm, CWL = 800 nm, FWHM = 40 nm
$177.47
Today
FBH810-10 Support Documentation
FBH810-10Customer Inspired! Premium Bandpass Filter, Ø25 mm, CWL = 810 nm, FWHM = 10 nm
$177.47
Today
FBH850-10 Support Documentation
FBH850-10Customer Inspired! Premium Bandpass Filter, Ø25 mm, CWL = 850 nm, FWHM = 10 nm
$177.47
Today
FBH850-40 Support Documentation
FBH850-40Customer Inspired! Premium Bandpass Filter, Ø25 mm, CWL = 850 nm, FWHM = 40 nm
$177.47
Today
FLH1030-10 Support Documentation
FLH1030-10Customer Inspired! Premium Bandpass Filter, Ø25 mm, CWL = 1030 nm, FWHM = 10 nm
$177.47
Today
FLH1064-8 Support Documentation
FLH1064-8Premium Bandpass Filter, Ø25 mm, CWL = 1064 nm, FWHM = 8 nm
$177.47
Today
FLH1064-10 Support Documentation
FLH1064-10Customer Inspired! Premium Bandpass Filter, Ø25 mm, CWL = 1064 nm, FWHM = 10 nm
$177.47
Today
FBH1070-10 Support Documentation
FBH1070-10Customer Inspired! Premium Bandpass Filter, Ø25 mm, CWL = 1070 nm, FWHM = 10 nm
$177.47
Today
FBH1200-10 Support Documentation
FBH1200-10Customer Inspired! Premium Bandpass Filter, Ø25 mm, CWL = 1200 nm, FWHM = 10 nm
$177.47
Today
FBH1550-12 Support Documentation
FBH1550-12Customer Inspired! Premium Bandpass Filter, Ø25 mm, CWL = 1550 nm, FWHM = 12 nm
$177.47
Today
Log In  |   My Account  |   Contact Us  |   Careers  |   Privacy Policy  |   Home  |   FAQ  |   Site Index
Regional Websites: West Coast US | Europe | Asia | China | Japan
Copyright 1999-2019 Thorlabs, Inc.
Sales: 1-973-300-3000
Technical Support: 1-973-300-3000


High Quality Thorlabs Logo 1000px:Save this Image

Last Edited: Sep 05, 2013 Author: Tony Gorges