Burst optical signal generating circuit and method for generating burst optical signal

Abstract

The invention discloses a burst optical signal producing circuit as well as a method for producing burst optical signals. The burst optical signal producing circuit comprises a programmable error code unit, a plurality of optical decay units as well as a photosynthesis way unit which are connected in sequence; each optical decay unit receives electric signals under the effect of multiple burst enable signals output by the programmable error code unit and converts the electric signals into optical signals to decay; each decayed optical signal is converted into an optical signal by the photosynthesis way unit to output; an electric signal shunt unit is connected between the programmable error code unit and each optical decay unit; the programmable error code unit outputs a burst electric signal separated at a time domain to the electric signal shunt unit; the electric signal shunt unit separates the burst electric signal into multiple paths of identical burst electric signals, and transmits the multiple paths of identical burst electric signals respectively to each optical decay unit. According to the burst optical signal producing circuit disclosed by the invention, the equipment connection can be simplified; moreover, various parameters of the burst optical signals can be adjusted; the application range can be expanded.

Description

technical field [0001] The invention relates to the field of optical burst testing, in particular to a burst optical signal generating circuit and a method for generating burst optical signals used in optical module testing. Background technique [0002] Due to the advantages of large bandwidth and low cost, passive optical networks have been widely deployed in broadband access networks around the world, and the demand has maintained a continuous growth momentum. A passive optical network system generally consists of an optical line terminal (OLT, OpticalLine Terminal), an optical network unit (ONU, Optical Network Unit) and an optical distribution network (ODN, opticalDistribution Network). The downlink signal from the OLT to the ONU through the 1:N optical passive splitter works in a continuous working mode. From ONU to OLT is called the uplink signal, which works in burst mode. [0003] The uplink technology is the core technology of the PON system, how to realize the m...

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Problems solved by technology

[0008] exist figure 2 In the circuit shown, although the usage of the pattern generator and the burst optical transmission module is small, the optical connection is relatively complicated, and the delay time of the optical fiber is fixed, so it is not easy to change the packet length of the burst optical signal. and the width of the packet interval, there are limitations in use

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