Optoelectronic modulator and optoelectronic interconnection interface

Abstract

The invention provides a photoelectric modulator and a photoelectric interconnection interface. The photoelectric modulator comprises an optical beam splitter, an optical beam combiner and two opticalmodulation branches connected in parallel. The light beam splitter is provided with two output ends, one output end is connected with the input end of one light modulation branch, and the other output end is connected with the input end of the other light modulation branch; the light beam combiner is provided with two input ends, one input end is connected with the output end of one light modulation branch, and the other input end is connected with the output end of the other light modulation branch; and each light modulation branch comprises a plurality of Mach-Zehnder modulators which are connected in series. According to the invention, the requirement on the driving capability of the electric driver is reduced, so that the electric signal (driving signal) does not need to be remotely transmitted, the complexity of signal integrity analysis is reduced, and the propagation loss of the electric signal (driving signal) is reduced.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to an optoelectronic modulator and an optoelectronic interconnection interface. Background technique [0002] With the development of high-performance computing and big data, the requirements for communication bandwidth in modern society are increasing day by day. As an emerging interface technology, optoelectronic interconnection technology, with its excellent high-speed signal transmission capability and ultra-high system Data storage and other aspects have been widely used. Optoelectronic interconnection technology includes optical modulators and electrical drivers. For optical modulators, the most mature technology is Mach-Zehnder Modulator (MZM) design technology. One MZM divides the light into two groups, and modulates by applying an anti-phase high-speed signal on each group of optical paths through an electric driver, so that the two groups of optical signals ...

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Problems solved by technology

[0003] However, the traditional MZM contains two sets of long-distance transmission lines and PN junctions. The high-speed signal of the electric driver is transmitted in the transmission line, and the optical speed matching is realized by controlling the impedance of the transmission line. Both quality and signal integrity place high demands on

First of all, for traditional MZM, the electric driver not only needs to drive the phase shifter in the optical modulator, but also drives two long-distance metal wires and terminal matching loads. Therefore, the electric driver must not only have a high signal gain to To meet the requirements of the phase shifter in MZM, it must also have a strong enough drive capability; secondly, when high-speed electrical signals are transmitted in the transmission line, it is inevitable to encounter interference from external noise and uncontrollable process disturbances. With the extension of the transmission line distance , these external interferences are cumulative, and the impact on the signal will gradually increase; moreover, in order to control the photoelectric delay matching, the transmission line needs to be precisely designed according to the material and thickness of the metal, including its transmission impedance and load matching network, transmission line The longer the length, the more difficult it is to control its signal integrity, which will cause more serious problems such as electrical signal loss and reflection, and the worse the modulation effect; finally, using the gold wire bonding process to connect the electric driver and the MZM will introduce bonding wires and keys. The large parasitic effect of the joint pin affects high-speed signal transmission. On the other hand, an additional impedance matching chip is added, which increases the hardware overhead and integration complexity of the system.

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