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AssigneeLucent Technologies Inc.
InventorsKatherine Theresa Nelson, William Alfred Reed, Kenneth Lee Walker, Ian Arthur White
Estimating the term…
An optical fiber communication system according to the invention comprises an optical fiber filter that can be manufactured at low cost and that can be conveniently incorporated into the system, substantially like a conventional fiber jumper. The filter comprises a length L of axially uniform optical fiber selected to have substantially no loss (e.g., <1 dB) at a wavelength .lambda..sub.1, and to have relatively high loss (e.g., >20 dB) at a wavelength .lambda..sub.2. The length L will typically be less than 100 m. In one embodiment the optical fiber is a single mode optical fiber at .lambda..sub.1 (e.g., 1.3 .mu.m) that does not have a guided mode at .lambda..sub.2 (e.g., 1.55 .mu.m). In another embodiment the fiber contains a dopant that does substantially not absorb radiation of wavelength .lambda..sub.1, but substantially absorbs at .lambda..sub.2. In the second embodiment, .lambda..sub.1 can be greater than .lambda..sub.2. Fiber filters according to the invention can be advantageously used in a variety of communication systems, and exemplary systems are disclosed.
An optical fiber communication system comprising:
Dependencies are inferred from the claim text.