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WaveSelector 
Features & Benefits
- High channel isolation
- Low insertion loss
- Epoxy-free optical path
- Telcordia? qualification in progress
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Applications
- Add/Drop node
- DWDM multiplexing
- CATV distribution networks
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Product Capabilities and
Value
Long-haul and metro DWDM networks require components that route
signals onto and off of the backbone. Thin-film filters provide a
convenient way to add or drop a single channel with channel spacings of
100 and 200 GHz. The WaveSelector offers high drop and pass channel
isolation, low insertion loss, and an epoxy-free optical path to ensure
reliable performance.
The WaveSelector uses thin-film interference coatings on a
glass substrate mounted between a pair of fiber collimators. This
device is manufactured with an epoxy-free path to avoid power handling
concerns and contamination within the optical path. This component is
inherently bi-directional and can be used either to add or drop
signals. This 3-port filter can be easily cascaded to multiplex or
de-multiplex multiple channels in an all-optical WDM network.
WaveSelector wavelengths are available on the ITU grid at channel
spacings of 100 and 200 GHz.
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Figure 1: Specifications of
Add/Drop Filters
| Parameters |
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| | Channel Spacing | 200 GHz | 100 GHz | | Pass Channel Bandwidth (-0.5dB)
(nm) | + 0.25 | + 0.11 | | Insertion
Loss (dB) | Pass Channel | | >1.2 (1.0 Typ.) |
>1.2 (1.2 Typ.) |
| | Reflect Channel |
>0.6 (0.4 Typ.) |
| Isolation
(dB) | Pass Channel | <10 | | Reflect Channel |
<28 | <25 | | Directivity (db) | >45 | >40 | | Return Loss (db) | >45 | | Polarization
Dependent Loss (db) | <0.1 |
<0.2 | | Thermal
Stability (db/oc) | <0.005 | | Thermal Wavelength Drift (nm/oc) |
<0.003 | <0.001 | | Package
Dimensions (dxl) (mm) | 5.5 x 32 |
5.5 x 32 |
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Figure 2: Spectral
Performance of
Single Channel Add/Drop Filters
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