C H A P T E R 1
Product Overview
The Cisco ONS 15501 is a low-noise, gain-flattened C-band optical EDFA (erbium-doped fiber amplifier). This guide describes how to install and operate the Cisco ONS 15501.
The Cisco ONS 15501 complements high-performance digital transmitters in topologies requiring amplification of 1550-nm optical signals.
This chapter includes the following sections:
•Product Description, page 1-1
•Optical Specifications, page 1-2
•Key Features, page 1-3
•Cisco ONS 15501 Applications, page 1-5
•Cisco ONS 15501 Front Panel, page 1-7
Product Description
The Cisco ONS 15501 contains an erbium-doped optical fiber, optical couplers, and one or more pump lasers and isolators. An optical signal (within a range of 1530 to 1563 nm) arrives at the input connector. The 1550- nm signal travels through a length of erbium-doped fiber cable. Inside the amplifier, light from a laser at a wavelength of 980 nm (called the pump laser) is used to amplify the signal at 1550 nm. The amplified signal is coupled to the output cable for transmission to a node. In longer cable runs, up to six Cisco ONS 15501 EDFAs can be connected in tandem.
The Cisco ONS 15501 uses 980-nm pump lasers that are built to meet Bellcore TR-NWT-000468 and MIL-883D standards. With a noise figure approaching the theoretical minimum, the amplifier achieves results superior to that obtained from a 1480-nm pump laser. The 980-nm pump laser has a long lifetime, exceeding one million hours. Use of a small number of high-quality components makes the
Cisco ONS 15501 a highly reliable product.
The Cisco ONS 15501 is polarization, modulation, and frequency independent, and operates in gain-controlled mode. It is optimized for different input and output powers, and can be used as a preamplifier, inline amplifier, or booster. The unit provides excellent gain flatness for the cascading of amplifiers in DWDM applications.
The Cisco ONS 15501 is physically designed to fit into a 19-inch, 23-inch, or ETSI equipment rack, with front, middle, or rear mounting capability. It is equipped with connectors for optional monitoring either locally or remotely.
| | Cisco ONS 15501 User Guide | | | |
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| 78-14134-02, Release 2.0 | | | 1-1 | |
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