Laser optics and optical assemblies includes etalons, cubes, polarizers, waveplates, laser mirrors, micro-optics, bonded high-power laser optics, and IBS coatings.

Precision Photonics

Visible & NIR Optics

BBS broadband beamsplitter plates can be used to either split or combine a laser beam with a broad bandwidth or multiple beams in the same optical path within a specified wavelength range.

A durable all-dielectric multilayer coating design is used for neutral splitting of unpolarized visible or near-infrared light at a convient 90° angle.

• Broadband dielectric 45° beamsplitter
• Reference measurement
• Sensor technology
• 50/50 laser splitting
• Low reflection BBAR coating on back surface (S2)
• For CW and low energy pulsed laser applications
• Runp = 50 ± 15%; other beamsplitting ratios are available, contact BFi OPTiLAS
• Other wavelengths and sizes are available

CVI

Broadband Beamsplitters - BBS

Continuously variable attenuation of linearly polarized light with the ABS or ABSO Continuously Variable Beamsplitter is achieved through the assembly of a rotating half-waveplate with a polarizing beamsplitter cube.

S polarized light is conveniently reflected at 90º while P polarized light is transmitted straight through the assembly. The amount of transmitted light depends on the alignment of the waveplate and can be manually adjusted from 1-95%.

The standard ABS variable laser beamsplitter utilizes a cemented beamsplitter cube (PBS) and multiple order half waveplate (QWPM).
The ABSO high energy variable beamsplitter utilizes a multiple order waveplate (QWPM) and an optically contacted beamsplitter cube (PBSO).

Applications:

• Variable Laser sampling
• Holography
• Interferometry
• Variable ratio beamsplitting

CVI

Continously Variable Laser Beamsplitters - ABS-ABS

LWP Long Wave Pass Dichroic Beamsplitters exhibit high transmission for a long wavelength band, high damage thresholds, and high reflectivity for a shorter band of wavelengths.

Reflectivity bandwidth is limited by coating design, incidence angle and polarization.

For high energy laser applications, specify pulse energy, pulse duration, repetition rate, and beam diameter.

• Fluorescence microscopy, optical parametric generation
• Customer specified reflected and transmitted wavelength bands
• Large variety of substrate diameters and thicknesses

CVI

Dichroic Beamsplitters - LWP

SWPShort Wave Pass Dichroic Beamsplitters exhibit high transmission for a short wavelength band, high damage thresholds, and high reflectivity for a longer band of wavelengths.

Reflectivity bandwidth is limited by coating design, incidence angle and polarization.
For high energy laser applications, specify pulse energy, pulse duration, repetition rate, and beam diameter.

Short Wave Pass Dichroic Beamsplitters can also be used as laser cavity mirrors to pass diode pump energy and reflect the laser energy.

• Fluorescence microscopy, optical parametric generation
• Customer specified reflected and transmitted wavelength bands
• To maximize efficiency, reflect 45° S and transmit 45° P
• High damage threshold, greater than 10J/cm2

CVI

Dichroic Beamsplitters - SWP

PCBS Fixed Ratio Cube Beamsplitters provide a choice of split ratios at a variety of narrowband wavelengths for specific polarization states.
A durable all-dielectric partial reflection coating is used at the internal interface, and all external surfaces are anti-reflection coated for the wavelength specified.

For best spectral performance and transmitted wavefront, fixed ratio cube beamsplitters should be used with collimated or near-collimated input light.
T
he PCBS and other cemented beamsplitter cubes are easy to mount, mechanically durable and ideal for use up to 1J/cm2.
Note that the product code for this product has recently changed from PCB to PCBS.

CVI

Fixe Ratio Cube Beamsplitters - PCB

BS1 high energy beamsplitters are plate windows coated with an all-dielectric coating to separate laser light into your choice of R/T split ratios.
The BS1 high energy plate beamsplitters exhibit almost no absorption and are designed specifically for 45° at the wavelength and polarization of interest.

Standard substrates have an anti-reflection coating on the second surface and a wedge of less than five arc minutes.

However, the beamsplitter coating can be done on any CVI wedged or plane parallel substrate to meet you application requirements.

• Reflectivity tailored to your exact requirements
• Beamsplitters centered at any wavelength, 193-2940nm

CVI

High Energy Beamsplitter - BS1

CVI offers BSR harmonic separator mirrors optimized for all combinations of harmonics. Below are some examples of effective systems built from these components.

Laser safety practices are of paramount importance in dividing the outputs of a high power Nd:YAG laser.

• Isolate Nd:YAG and Nd:YLF harmonics
• 2nd, 3rd, 4th, and 5th harmonic separation
• Characterization of collagen orientation in human dermis by two-dimensional second-harmonic-generation polarimetry
• High damage threshold, all dielectric coating
• To maximize efficiency, reflect 45°S and transmit 45°P
• Other diameters and thicknesses available
• For best polarization purity, use multiple BSRs in a series
• For wavelengths not show, see dichroic beamsplitters

CVI

High Energy Harmonic Separators - BSR

The UT ultra thin plate beamsplitters is an all-dielectric, non-absorbing plate beamsplitter on a fused silica substrate for high energy beamsplitting.
Use this beamsplitter when you need to minimize beam displacement

With greater than 10J/cm2 damage threshold, CVI's ultra thin plate beamsplitters are especially useful for high energy applications where cemented beamsplitter cubes may fail.
Plate beamsplitters are thinner and lighter than cube beamsplitters.
This may be required in some applications where there is not enough room for a cube.

• Minimizes displacement of transmitted beam
• High damage threshold, all dielectric coating
• User specified reflectance from 1 percent to 99.5 percent
• User specified CWL from 244nm to 1550nm
• Standard 1.25" OD ring mount prevents breakage and fits easily into 1.25" lens or ring mount

CVI

High Energy Ultra Thin Beamsplitters - UT

The BSNP nonpolarizing plate beamsplitters is an all-dielectric plate beamsplitter that divides laser energy at 45° while preserving input polarization in reflected and transmitted beams.

Choose from three aperture dimensions and a variety of laser wavelengths.

With 3J/cm2 damage threshold, CVI's nonpolarizing plate beamsplitters are especially useful for high energy applications where cemented beamsplitter cubes may fail.

Plate beamsplitters are thinner and lighter than cube beamsplitters.
This may be required in some applications where there is not enough room for a cube.

• Cement-free beamsplitter
• 50% reflectance
• Damage threshold > 3J/cm2
• |RS - RP|< 5%
• Other reflectivities and wavelengths available upon request

CVI

Non Polarizing Plate Beamsplitters - BSNP

Non-Polarizing Cube Beamsplitters / Spectrally Neutral Cube Beamsplitters

CVI

Non-Polarizing Cube Beamsplitters - NCB-NCBS

Serie OI - OIO: The OIO high energy optical isolator utilizes a muliple order wavelength (QWPM) and an optically contacted beamsplitter cube(PBSO), while the standard OI beamsplitter uses a cemented beamsplitter cube (PBS).

• Substrate material: Crystal Quartz , Calcite, BK7 Glass or fused silica
• Isolation: 20dB or 35dB
• 20dB OI Damage threshold: 1J/cm², 20ns - 20Hz at 1064nm
• 20dB OIO Damage threshold: 5J/cm², 20ns - 20Hz at 1064nm
• 35dB OI Damage threshold: 100mJ/cm², 20ns - 20Hz at 1064nm
• Passive isolation of linearly polarized light
• Custom isolator available for other wavelength UV to NIR

CVI

Optical Isolators

PLB Pellicle beamsplitters are very thin nitrocellulose membranes bonded to lapped aluminum frames.

The problem of ghost images is eliminated by the thinness of the membrane, since the second surface reflection, for all practical purposes, is superimposed on the first surface reflection. These pellicle beamsplitters offer the absolute minimum in absorption, distortion, chromatic aberration, ghosting, and astigmatism due to their extreme thinness.

• 2.0µ thickness eliminates change in optical path length
• No second surface reflections
• No chromatic aberrations in converging beams
• Thickness uniformity 1 /25mm @ 633nm
• Contact BFi OPTiLAS for other wavelengths and beamsplitting ratios

CVI

Pellicle Beamsplitters - PLB

Known as a leaky polarizing beamsplitter, the SBC Sampling Beamsplitter Cube is both a fixed ratio beamsplitter while also maintaining a controlled amount of P polarization to "leak through" into the reflected beam

• Optical disk testing
• Polarization sensitive beamsplitter cubes
• Four standard beamsplitting ratios available

CVI

Sampling Beamsplitter Cubes - SBC