A bias voltage control device of a modulator and system thereof
A bias voltage and control device technology, applied in electromagnetic wave transmission systems, transmission systems, electrical components, etc., can solve the problems of large interference, easy distortion of the signal to be transmitted, inaccurate control of the modulator bias voltage, etc., to improve reliability. The effect of sex and precision
Active Publication Date: 2022-08-09
BEIJING UNIV OF POSTS & TELECOMM
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[0003] In view of this, the purpose of this disclosure is to propose a modulator bias voltage control device based on a phase-locked loop and its system, to at least solve the above-mentioned inaccurate control of the modulator bias voltage and large interference, which cause the signal to be transmitted to be easily transmitted. One of the problems of distortion and low precision
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[0034] In order to make the objectives, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below with reference to the specific embodiments and the accompanying drawings.
[0035] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should have the usual meanings understood by those with ordinary skill in the art to which the present disclosure belongs. "First", "second" and similar words used in the embodiments of the present disclosure do not denote any order, quantity or importance, but are only used to distinguish different components. "Comprises" or "comprising" and similar words mean that the elements or things appearing before the word encompass the elements or things recited after the word and their equivalents, but do not exclude other elements or things. Words like "connected" or "connected" are not limi...
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The present disclosure provides a bias voltage control device for a modulator and a system thereof. The device includes: a detection device, connected to the output end of the modulator, for receiving at least part of the optical signal output by the modulator, and The at least part of the optical signal is converted into a feedback electrical signal; the phase locking device is connected to the output end of the detection device and the output end of the electrical signal generating device, and is used for converting the feedback electrical signal and the electrical signal generated by the electrical signal generating device. Mixing the electrical signal to be modulated to obtain a mixed signal, and obtaining a bias voltage signal based on the DC component in the mixed signal; and outputting the bias voltage signal to the modulator, so that the modulation The device works at the orthogonal point. According to the present disclosure, the distortion of the modulation signal of the modulator can be reduced, and the reliability and accuracy of the modulation signal can be improved.
Description
technical field [0001] The present disclosure relates to the technical field of modulators, and in particular, to bias voltage control of modulators. Background technique [0002] With the development of science and technology, optical fiber communication has become the mainstream of modern network transmission. As one of the core components, the modulator can modulate the electrical signal to be transmitted to continuous light of a certain frequency, and then enter the backbone network. With optical fiber delivered to thousands of households. In order to make the modulator work at the optimum bias point, the pilot frequency method and the optical power detection method are usually used to control the bias voltage of the modulator. However, since the pilot frequency method is added with a pilot frequency signal, it is a kind of interference to the signal to be transmitted, which affects the stability of the signal and is not suitable for high-precision occasions; the optica...
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IPC IPC(8): H04B10/516
CPCH04B10/516
Inventor 郭弘赵卓泽喻松乔耀军林平卫罗斌
Owner BEIJING UNIV OF POSTS & TELECOMM