Method and procedures for system test and verification of optical networks using noise injection/loading
First Claim
1. A noise injection/loading circuit for use in noise loading an optical network, said noise injection/loading circuit comprising:
- an optical noise injection/loading amplifier for applying noise to the optical network, said noise injection/loading amplifier configured to output at a fixed power level; and
an optical attenuator connected in series with the optical noise injection/loading amplifier for receiving the signals to be applied to the noise injection/loading amplifier and for attenuating the signal to adjust the signal to noise ratio of output from the noise injection/loading amplifier.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention enables system verification and test of high quality optical networks with extremely low BER. The invention allows investigation of optical nonlinear penalty contributions by varying channel power while keeping constant OSNR at the receiver end. The present invention provides a method to measure system performance gains and penalties associated with different dispersion maps. The present invention gives simple automated test procedures which ensures fast test time. The present invention comprises a transmitter for transmitting an optical test signal to the optical network. The present invention includes a first attenuating module for attenuating channel power of the optical test signal. Also, the present invention includes a noise injection module for adding noise to the optical test signal. Further, the present invention includes a second attenuating module for adjusting the channel power of the optical test signal so that the optical test signal can be detected by a receiver, and a test module for calculating the BER based on the optical test signal received at the receiver.
49 Citations
20 Claims
-
1. A noise injection/loading circuit for use in noise loading an optical network, said noise injection/loading circuit comprising:
-
an optical noise injection/loading amplifier for applying noise to the optical network, said noise injection/loading amplifier configured to output at a fixed power level; and
an optical attenuator connected in series with the optical noise injection/loading amplifier for receiving the signals to be applied to the noise injection/loading amplifier and for attenuating the signal to adjust the signal to noise ratio of output from the noise injection/loading amplifier. - View Dependent Claims (2, 3)
-
-
4. In an optical network, a method comprising the steps:
-
transmitting an optical test signal to the optical network;
attenuating channel power of the optical test signal;
adding noise to the optical test signal; and
calculating the BER based on the optical test signal received at the receiver. - View Dependent Claims (5, 6, 7)
-
-
8. A system, comprising:
-
an optical network;
a transmitter for applying a test signal to the optical network for testing the optical network; and
a noise injection/loading circuit, comprising;
an optical noise injection/loading amplifier for applying noise to the optical network, said noise injection/loading amplifier configured to output at a fixed power level; and
an optical attenuator connected in series with the optical noise injection/loading amplifier for receiving the signals to be applied to the noise injection/loading amplifier and for attenuating the signal to adjust the signal to noise ratio of output from the noise injection/loading amplifier. - View Dependent Claims (9, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20)
-
-
15. In an optical network, a method of testing the optical network, comprising:
-
providing a noise injection/loading circuit in the optical network, wherein said noise injection/loading circuit includes an optical noise injection/loading amplifier for adding noise and an optical attenuator for attenuating input signal power of input to the optical noise injection/loading amplifier;
configuring the noise injection/loading optical amplifier to be in constant output power mode;
setting the optical attenuator to a first level of attenuation;
applying a first test signal to the optical network;
calculating a first measurement of a performance metric for the optical network;
setting the optical attenuator to a second level of attenuation; and
calculating a second measurement of a performance metric for the optical network.
-
Specification