Non-Polarizing Beamplitters for DWDM0 pages

™

precision optical solutions

Covering the full spectrum of your photonics needs.

Think REO

High Performance, Non-Polarizing
Beamsplitters for Telecommunications
These cube beamsplitters are specifically intended for demanding
DWDM applications in telecommunications. Optimized for use in
Gires-Tournois interferometer based interleavers and dispersion
compensators, REO non-polarizing beamsplitters deliver broadband,
polarization insensitive operation and exceptional path length matching
for the reflected and transmitted beams. This consistently delivers the
transmission and channel isolation characteristics required by
demanding long-haul and metro network applications.
Traditional non-polarizing beamsplitters are limited by either a narrow
operating band or high internal absorption, however, REO avoids these
drawbacks by employing all dielectric, ion beam sputtered (IBS)
coatings, together with a high index of refraction contrast material set.
The result are telecom C-band (1525 – 1570 nm) and L-band
(1565 – 1620 nm) beamsplitters that deliver a transmission and reflection
ratio of 50% ± 1.5% over their entire operating range, with the s and p
polarization components matched to within 2%. Furthermore, a series
of high precision, proprietary fabrication techniques, together with our unique Activated Covalent Bonding (ACB™),
adhesive-free bonding process, enable REO to consistently produce cubes with an optical path difference between the two
output beams of under 3 µm, together with subarcminute beam deviation accuracy and low wavefront distortion (surface
flatness λ/20 @ 633 nm). These beamsplitters are available in the 3 mm to 12.5 mm size range, and are fabricated from fused
silica substrates.

Typical Specfications
Material

Fused Silica

Wavelength Ranges

C-band (1525 – 1570 nm) or L-band (1565 – 1620 nm)

Transmitted wavefront distortion (@ 632 nm)

λ/20

Transmission

50% ± 1.5% independent of polarization

Reflection

50% ± 1.5% independent of polarization

Polarization

s and p components matched to within 1.5%

Pyramidal error

<1 arc minute

Temperature range

−196 °C to 400 °C

Humidity range

0 to 100%

Size range

3 mm to 12.5 mm

Surface Quality

20-10

Clear Aperture

90%

5 5 0 5 A i r p o r t B l v d . B o u l d e r, C O 8 0 3 0 1 U S A | 3 0 3 . 9 3 8 . 1 9 6 0 | t h i n k r e o . c o m