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Contents:
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PDF of the 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.) |
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| 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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