A time-division multiplexing device with the same polarization and its manufacturing method

Abstract

The invention relates to the technical field of optical sampling, particularly discloses an identical polarization time division multiplexing device and a manufacturing method, and aims to solve the problems of the prior art. An input optical pulse signal is divided into 2n optical pulse signals which have the same amplitude polarization state and are delayed by equal time intervals through n stages of time division multiplexing modules which are cascaded. The device comprises the n stages of time division multiplexing modules, wherein the n stages of time division multiplexing modules are sequentially cascaded end to end; the output end of the (n-1)th stage of time division multiplexing module is connected with the input end of the nth stage of time division multiplexing module; each time division multiplexing module comprises a three-port circulator, a coupler, a power regulation module and a time delay regulation module; the input ends of the three-port circulators are used as the input ends of the time division multiplexing modules, and the output ends of the three-port circulators are used as the output ends of the time division multiplexing modules.

Description

A time-division multiplexing device with the same polarization and its manufacturing method technical field The invention relates to the field of optical sampling technology, in particular to a time-division multiplexing device with the same polarization and a manufacturing method. Background technique The traditional time-division multiplexing structure is shown in Figure 1. Due to the different transmission paths of the periodic light pulses replicated by this structure, the polarization states of the pulses are different from each other. The optoelectronic modulator is usually set to selectively modulate the TE mode or the TM mode, and the other mode is ignored, so the optoelectronic modulator is usually polarization-sensitive, and pulses with different polarization states and the same amplitude pass through the modulator, and the resulting modulation The results vary from each other. There are two general methods to solve the above problems: one is to make the whole...

AI Technical Summary

Problems solved by technology

The technical problem to be solved by the present invention is: when using the traditional time-division multiplexing structure to replicate pulses, although the same amplitude and the same time interval of the pulses can be guaranteed, the polarization state of the new pulses generated will be different, so that the subsequent optical sampling modulation Difficult to work normally, providing a time-division multiplexing device with the same polarization and a manufacturing method

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