|
| This product, which metal-ion doped optical fiber are utilized,
is a soat of passive optical devices which adjust optical to
desired levels. |
Features
The following features can be obtained, using by metal-ion doped
optical fibers.
„Simple structure
„High return loss(55dB/65dB)
„Superior durability (250mW)
„Bellcore Std. (GR-910-CORE) conformed
„Less Polarization dependence
„Less Wevelength dependence |
| Items |
SHOWA's
Product |
Other's Product |
| Structure |
 |
 |
| Principle |
Absorption
by metal-ion doped fiber |
Absorption by metal
coating mirror |
| Polishing |
2
surfaces to be polished |
4 surfaces to be
polished |
| Material |
Metal-ion
doped optical fiber with one ferrule |
Optical fiber-metal
coating mirror with 2 fibers |
| Durability |
More
than 250mW |
Less than 50mW |
| Connector
Type |
Attenuation
(dB) |
Return
Loss
(dB) |
Optical
Fiber |
Wavelength |
FC
Type
„
SC Type
„
ST Type |
1 |
AdPC †40dB
UPC †50dB
@@†55dB
(except 1,2,3,4dB)
APC †60dB
@@@†65dB
(FC/SC Type) |
|
SM |
1310
&
1550 |
| 2 |
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 8 |
| 9 |
| 10 |
| 15 |
| 20 |
| 25 |
DSM
|
1550 |
| 30 |
Features
These are optical fiber terminators witch are newly designed
utilizing metal-ion doping method as well as fixed optical
attenuators.
„Superior durability (100mW over)
„High return loss
„Low price by simple structure |
| Items |
SHOWA's Product |
Other's Product |
| Structure |
 |
 |
| Principle |
Passing beam and
Reflected beam are absorbed by metal-ion doped fiber |
Reflected bean is excepted from
optical fiber by using Angled polishing |
| Polishing |
One surface to be
polishing |
2 surface to be polishing |
| Material |
Metal-ion doped
fiber with one usual ferrule |
Optical fiber with one special
ferrule |
| Connector
Type |
Optical
Fiber |
Wavelength(nm) |
Return
Loss(dB) |
FC Type
E
SC Type
E
MU Type
|
SM |
1310
&
1550 |
AdPC†40
UPC†50 |
|
