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Arbitrary bias point control system for M-Z modulator

A control system and modulator technology, applied in the field of microwave optoelectronics, can solve the problems of narrow working temperature range and low control precision, and achieve the effects of improved accuracy, high control precision and easy integration

Active Publication Date: 2018-09-21
THE 44TH INST OF CHINA ELECTRONICS TECH GROUP CORP
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AI Technical Summary

Problems solved by technology

[0004] The invention provides an arbitrary bias point control system of an M-Z modulator to solve the problems of narrow working temperature range and low control precision of the current bias point control system

Method used

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  • Arbitrary bias point control system for M-Z modulator
  • Arbitrary bias point control system for M-Z modulator

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Embodiment Construction

[0031] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, and to make the above-mentioned purposes, features and advantages of the embodiments of the present invention more obvious and understandable, the following describes the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings For further detailed explanation.

[0032] In the description of the present invention, unless otherwise specified and limited, it should be noted that the term "connection" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be Directly connected or indirectly connected through an intermediary, those skilled in the art can understand the specific meanings of the above terms according to specific situations.

[0033] see figure 1 , is a ...

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Abstract

The invention provides an arbitrary bias point control system for an M-Z modulator, comprising: an M-Z modulator; an optical coupler; a photoelectric conversion amplifier used for receiving an opticalsignal provided by the optical coupler, and converting the optical signal into an electrical signal for amplification; a first low pass filter used for filtering out a fundamental component of the electrical signal; a band-pass filter used for filtering out a second harmonic component of the electrical signal; a second low pass filter used for filtering out a low-frequency direct current component of the fundamental component; a third low-pass filter used for filtering out a low-frequency direct current component of the second harmonic component; a divider used for performing division operation on the low-frequency direct current components in the fundamental component and the second harmonic component to obtain an offset error correction voltage; and an adder used for adding an offset error correction voltage, a low frequency jitter signal, and a direct current bias voltage to obtain a corrected direct current bias voltage, and supplying the corrected direct current bias voltage to the direct current bias terminal of the M-Z modulator. The invention is capable of achieving accurate control of any bias point of the M-Z modulator in a wide temperature range.

Description

technical field [0001] The invention belongs to the technical field of microwave optoelectronics, and in particular relates to an arbitrary bias point control system of an M-Z (Mach-Zehnder) modulator. Background technique [0002] At present, the optical fiber communication system is developing in the direction of high speed, long distance, and large capacity. Because the M-Z modulator has high modulation rate, stable working performance, small frequency chirp of the modulated signal, low optical loss, and is suitable for various code types And other advantages, are widely used in high-speed optical communication systems, microwave photonics links and other related optical transmission processing systems. The transfer function of the M-Z modulator is a nonlinear function, so when using the M-Z modulator, it needs to be loaded with a DC bias voltage to ensure that its signal modulation can work at the appropriate operating point of its transfer function. However, the M-Z mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/50H04B10/516
CPCH04B10/505H04B10/516
Inventor 谭敬孙力军陈行王克依瞿朋飞徐啸
Owner THE 44TH INST OF CHINA ELECTRONICS TECH GROUP CORP
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