Optical label and payload separator based on quantum dot semiconductor optical amplifier (QDSOA)

Abstract

The invention discloses an optical label and payload separator based on a quantum dot semiconductor optical amplifier (QDSOA). On one hand, by means of high pass characteristics of saturated QDSOA, a low-frequency optical label in an optical packet is filtered (repressed) to obtain a payload signal that is to say erasing the optical label; on the other hand, by means of cross gain modulation of the QDSOA, continuous fill-in light with wave length of lambda 2 is input, and the continuous fill-in light is modulated to an inversion signal of the optical packet to obtain an optical label signal of which payload is repressed; finally, demultiplexing is performed through wavelength division multiplexers to separate the optical label and the payload. An experiment shows that the separation of the optical label from the payload is correctly achieved by the optical label and payload separator, the suppression ratio of the separated label and payload is high, and the eye pattern opening degree is good. According to the optical label and payload separator based on the QDSOA, the structure uses the QDSOA as the center, one semiconductor laser and two wavelength division multiplexers are added to finish separation, the structure is simple, meanwhile, the separation is based on modulation frequency of the optical label and the payload, and thereby, influence of time sequence accuracy on separation can be avoided.

Description

technical field [0001] The invention belongs to the technical field of optical packet switching in optical fiber communication, and more specifically relates to a QDSOA-based optical label and payload separator. Background technique [0002] Among the three optical switching forms of optical wavelength switching, optical burst switching and optical packet switching, optical packet switching has the smallest switching granularity and the highest statistical multiplexing rate, and is an ideal optical switching form. [0003] Usually, an optical packet consists of two parts: an optical label and a payload. When the optical packet arrives at the switching node, the packet processing module first separates the optical label from the payload, wherein the optical label is sent to the label processing module, and the payload is sent to the switching module for switching. The label processing module recognizes the optical label, extracts the routing information, and then performs ro...

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Problems solved by technology

However, the above solutions all have the disadvantages that the separation of optical tags and p

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