FOTEC A400 Variable Fiber Optic Attenuators
Description
he ATT100 series variable attenuators are identical to the old FOTEC A400 series variable attenuators. The ATT100 series are ideal for simulating cable loss for lab testing of link power margin or reducing power in links where receivers are being overloaded. The ATT100 variable attenuators are of the gap-loss type. The loss is induced by pulling the connector endfaces apart. Since the light exits in an expanding cone, the receiving fiber will capture less light as the gap gets larger. Air gap attenuators are ideal for use with any LED systems and many laser systems. Some laser systems, especially high speed digital links (over 1 GB/s) or analog CATV systems may not operate well with these attenuators due to back reflections. If you are using these attenuators in those types of systems, you should use the ATT120 with a FC/APC connector, which have very low return loss even when unmated. The ATT100 variable attenuators mate to cables with the connector types listed. If you need to use them with other connector types, use hybrid cables, with one connector matching the attenuator and the other connector mating to the network connector. The fiber type used should also match the network fiber type, with one exception: if in a singlemode network your receiver uses a multimode "bucket" fiber, you can use a matching multimode fiber on the receiver side of the attenuator.
FOTEC A400 Variable Fiber Optic Attenuators
Specifications |
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|---|---|
| Number Of Channels: | Multi Channel |
| Operating Wavelength Range: | 1310-1550nm |
| Dynamic Attenuation Range (max): | 30 dB |
| Insertion Loss (max): | 70 dB |
| Return Loss (min): | 70 dB |
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Frequently Asked Questions
The ATT100 series variable attenuators are ideal for simulating cable loss for lab testing of link power margin or reducing power in links where receivers are being overloaded.
If you are using these attenuators in those types of systems, you should use the ATT120 with a FC/APC connector, which have very low return loss even when unmated.
If you need to use them with other connector types, use hybrid cables, with one connector matching the attenuator and the other connector mating to the network connector.
The ATT100 variable attenuators are of the gap-loss type.
Some laser systems, especially high speed digital links (over 1 GB/s) or analog CATV systems may not operate well with these attenuators due to back reflections.