Corporate Office: 864.277.7200
FiberSource
Manufactured Products Services Documentation About FiberSource Distributors Contact Us
 
Adhesives
Adhesives
Manufactured Products
 
Custom Adjusted Refractive Index Adhesives for Optical Path Bonding
(High Tg type/Low Tg type)

Features

Conventional adhesives for optical path bonding of optical communication devices produce adverse effects such as noise, because they have a different refractive index from that of optical fibers or other optical devices, resulting in reflection at bonded interface.

The refractive index of this adhesive can be adjusted between 1.45 and 1.57 ( ) with}0.005 accuracy by altering the fluorine content, which is able to eliminate such adverse effects. Being a single component of low viscosity, the adhesive is mixing-free and quickly cured at room temperature under UV irradiation, thus ensuring fast adhesion. In addition, this bonded area is hardly affected by heat or moisture and is highly durable.


Main properties of Optical Adhesive for bonding optical waveguide
(Custom Adjusted Refractive Index Adhesive, Low Tg type, High Tg type)

Type (Main Components)

Low Tg type (Epoxy)

High Tg type (Epoxy)

 

Custom Adjusted
RI Adhesive,
High Tg Type

GA700 L

Custom Adjusted
RI Adhesive,
Low Tg Type

GA700 H

Conditions

External appearance

transparent

transparent

transparent

transparent

Viscosity (cP) [23]

200~560

250

370~740

252

Curing

Curing Time (min)

10 *1

10 *1

10 *1

10 *1

Shrinkage during curing (%)

4~8

4

3~5

3

Properties after curing

Controllable range of Refractive index (0.005 accuracy)

1.45~1.56
(@)

1.445
(@1550nm)

1.46~1.57
(@)

1.445
(@1550nm)

Optical transmittance (%)
[ = 1.3m, 1mm]

86~90

94

89~90

93

Adhesion Strength (kgf/cm2) [Glass]

200

>200

120~ 180

94

Hardness (Shore D) [25]

23~43

44

78~82

78

Glass Transition Temperature ()

49~67

49

130~137

138

Thermal expansion coefficient
( )

8~11

14

6c9

9


(Note)
*This property data is a measured value on samples instead of the guaranteed value.
**Special tuning of refractive index ; Controllable range by0.001 can be available upon customer's request.
Recommended curing process :

*1 UV irradiation : 10mW/cm2 (365nm) Heat treatment : 60 ~ 100 for 1~2h


Applications:

For bonding light-passing areas such as one optical fiber to another optical fiber, or an optical fiber to an optical device. At present, further applications optical modulation units, PLC optical devices (splitters, couplers) are being studied.

 
RoHS TIA ISO9001 LinkedIn