The ZPU12-RI and ZPU13-RI series are photoactive UV curable
resins based on perfluorinated acrylate. They are applicable
to optical waveguide devices and optical thin film applications.
These coating resins have low optical loss for optical communication
wavelengths, small birefringence and excellent environmental
stability.
To be used for various waveguide structures, precise and continuous
control of the refractive index can be available achieved by
blending technique with standard polymer solutions. To obtain
the best film quality, a nitrogen environment should be is recommended
during the UV exposure time.
Features
Applications
UV curing type
Low optical loss
Environmental stability
Controllable refractive index
Low birefringence
Good adhesion
Optical power splitters
Variable optical attenuators
Optical switches
WDM-related devices
Transceiver waveguide
Hybrid waveguide claddings
Performance Specifications
Exguide™
ZPU13-RI
ZPU12-RI
430
450
460
450
470
480
Liquid
Viscosity (cps
@ 25 ℃)
50 ~ 200
200 ~ 350
Filtration
0.1 ~ 0.2 ㎛ absolute PTFE
filter
UV-exposure
(under N 2 )
> 2500 mJ/cm2
(160 ℃ /30 min, post baking)
Film
Propagation Loss
(measured from slab waveguide)
0.32 dB/cm @1.55 ㎛
0.35 dB/cm @1.55 ㎛
<0.1 dB/cm @1.31 ㎛
<0.1 dB/cm @1.31 ㎛
Refractive Index
@ 1.55 ㎛
1.430
1.450
1.460
1.450
1.470
1.480
Birefringence
(n TE -n TM
)
0.0007 ± 0.0003
0.001 ± 0.0003
Refractive Index
uniformity
< 0.00012
< 0.00012
TO Coefficient
(10 -4 / ℃ , @1.55 ㎛
)
-1.8
-1.7
CTE (ppm/ ℃ ,
by TMA)
300 ~ 400
200 ~ 300
Glass Transition
Temp. (Tg)
Not detectable
Not detectable
Degradation
Temp. (1 wt%)
300 ± 10 ℃
300 ± 10 ℃
Surface Roughness
(AFM)
< 0.35 nm at 8 ㎛
thickness
Film Thickness
< 25
㎛ per coating (multi-coating available)
Reliability
Refer to technical support
*Refractive index is precisely tunable from 1.43 to 1.48 by
request.
Availability and Storage
ZPU12 -RI and ZPU 13-RI resins are available in 100g and
500g quantities . The ZPU12-RI, ZPU1 and 3-RI should be stored
in the original bottle with a tight cap in a dark and cool
place at between 10 ~ 25°C. Moisture should be avoided because
it may affect the product's performance.
The test films were made by spin coating and curing on
the Si wafer after treatment of the adhesion promoter (ZAP1020
).
During the test, all of the films were not peeled off
from the Si wafer substrate and their refractive index were
not changed.
