Burst-mode low-jitter optical transceiver module and operation method thereof

Abstract

The invention discloses a burst-mode low-jitter optical transceiver module. The burst-mode low-jitter optical transceiver module comprises an optical transmitting module and an optical receiving module. The input end of a single-ended-to-differential conversion unit of the optical transmitting module is connected with a burst-mode signal input externally, and the output end of the single-ended-to-differential conversion unit is connected with the input end of a laser drive unit. The output end of the laser drive unit is connected with the input end of a light-operated unit. The output end of the light-operated unit is connected with the control end of the laser drive unit through the light-operated unit. The output end of a laser of the optical receiving module is opposite to the input end of a laser detector. The output end of the laser detector is connected with the input end of a pre-amplifying unit. One output end of the pre-amplifying unit is directly connected with one input end of a judging unit, and the other output end of the pre-amplifying unit is connected with the other input end of the judging unit through a peak detection unit. The output end of the judging unit outputs the burst-mode signal. By the adoption of the burst-mode low-jitter optical transceiver module, the burst-mode signal can be directly converted to an optical signal to be transmitted, so that signal transmission jitter is reduced.

Description

technical field [0001] The invention relates to an optical module, in particular to a burst-type low-jitter optical module and an operating method thereof. Background technique [0002] In some specific fields, it is necessary to use optical fiber to transmit burst digital signals with a bandwidth of 0-40Mbps. This kind of signal has uncertain factors, most of the time is low level, and only a few times there will be one or several high levels. This kind of signal does not provide a clock synchronous with the signal. In addition, the signal has relatively high requirements on jitter, and the jitter is required to be less than or equal to 3ns on the rising edge of the pulse. [0003] At present, optical modules are mainly divided into high-speed optical modules and low-speed optical modules. The low-speed optical modules currently on the market are mainly concentrated in the range of 0-2Mbps, and only a few manufacturers can achieve 0-10Mbps. However, for some special field ...

AI Technical Summary

Problems solved by technology

The low-speed optical modules currently on the market are mainly concentrated in the range of 0-2Mbps, and only a few manufacturers can achieve 0-10Mbps. However, for some special field applications, wider transmission bandwidth is required, and these low-speed optical modules cannot meet the requirements.

High-speed optical modules generally need to encode and decode digital signals through 8B / 10B to reduce the DC characteristics of the signal. Since the signal to be transmitted does not provide a synchronous clock, if asynchronous clock sampling is used for 8B / 10B encoding and decoding, it will inevitably increase signal jitter At present, the use of high-speed optical modules on the market to transmit 0-40Mbps signals is an asynchronous sampling method, and its jitter is generally above 8ns, so using high-speed optical modules to transmit 0-40Mbps signals cannot meet the requirements

Images