Programmable polarized optical pulse delay unit and electric pulse delay unit

Abstract

The invention provides a programmable polarized optical pulse delay unit and an electric pulse delay unit. The programmable polarized optical pulse delay unit comprises a first four-port polarized beam splitter / combiner (1), a second four-port polarized beam splitter / combiner (2) and a phase modulator (3), wherein the phase modulator (3) is used for applying modulation voltage to change the phases of the passing optical pulses, thus changing the final polarization state. The optical pulse delay unit has simple structure, is convenient to integrate and can be used for polarized optical pulse delay of all optical fibers and free space. As all the devices are the standard optical fiber devices in optical communication, the devices can be integrated in a small package by the optical integration technology. The programmable optical pulse delay unit is simple and convenient in control and programmable optical delay output can be realized by applying modulation voltage on the phase modulator. The programmable optical pulse delay unit combines electro-optical conversion and optical-electro conversion and can utilize optical delay to expand the range of electric delay.

Description

technical field [0001] The present invention relates to the technical field of optical delay, and more specifically, the present invention relates to a programmable polarized light pulse delayer and an electric pulse delayer. Background technique [0002] In the field of optical communication and optical signal processing, it is often necessary to delay the optical pulse signal. For example, for an interferometer, the time difference of the two optical pulses is often required to be within the coherence time, but in practice, it is difficult to keep the optical paths of the two optical paths completely equal. At this time, an optical delayer can be used to delay one of the optical pulses, and by adjusting the delay, the two beams of light are within the coherence time and coherence length during interference, thereby achieving stable interference. In the switching system and access system of the optical packet switching network, the problem of packet competition often occur...

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the defects of complex structure, poor integration and practicability of the existing polarized light pulse delayer, the present invention proposes a programmable polarized light pulse delayer and an electric pulse delayer

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