Bias voltage control device and bias voltage control method based on dual-polarization IQ modulator
An IQ modulator and bias control technology, applied in the field of optical communication, which can solve the problems of unstable bias state and affecting system performance, etc.
Active Publication Date: 2020-10-23
GUANGXUN SCI & TECH WUHAN
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This may cause its bias state to be unstable, affecting system performance
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[0054] The exemplary embodiments will be described in detail here, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present invention. Rather, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.
[0055] The present disclosure provides a bias control device based on a dual polarization IQ modulator. figure 1 It is a schematic structural diagram of a bias control device based on a dual-polarization IQ modulator according to an exemplary embodiment. Such as figure 1 As shown, the bias control device includes a dual-polarization IQ modulator, a controller, and a voltage-controlled constant ...
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The invention relates to a bias control device and a bias control method based on a dual-polarization IQ modulator. The bias control device comprises a dual-polarization IQ modulator which is used forcarrying out coherent modulation on an optical carrier wave emitted by a light source; a controller which is electrically connected with the dual-polarization IQ modulator and is used for acquiring the optical power of the optical carrier modulated by the dual-polarization IQ modulator and adjusting a bias voltage value in a preset bias voltage range according to the minimum value or the median value of the optical power; and a voltage-controlled constant current circuit, wherein the input end is connected with the controller, the output end is connected with the dual-polarization IQ modulator; the voltage-controlled constant current circuit is used for outputting a bias signal for coherent modulation to the dual-polarization IQ modulator based on the bias value output by the controller,so that under the condition that the bias value is frequently adjusted, the linear characteristic between an input signal and an output signal of the voltage-controlled constant current circuit can beutilized to realize the coherent modulation of the dual-polarization IQ modulator. The operation is simple, and the use is convenient.
Description
Technical field [0001] The present disclosure relates to the field of optical communication technology, and in particular to a bias control device and a bias control method based on a dual-polarization IQ modulator. Background technique [0002] At present, optical communication technology is continuously developing in the direction of higher speed and greater capacity. In high-speed optical transmitters, the modulation of optical signals usually requires dual-polarization IQ modulators. However, when dual-polarization IQ modulators are used, they are susceptible to environmental factors, including temperature. This may cause its bias state to be unstable and affect system performance. In particular, when performing optical carrier modulation on the light source, in order to ensure the optical carrier modulation effect, it is necessary to control the bias state of the modulator. Summary of the invention [0003] In one aspect, the present disclosure provides a bias control devi...
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Login to View More IPC IPC(8): H04B10/556H04B10/54H04B10/548G02F1/03G02F1/035
CPCG02F1/03G02F1/035H04B10/541H04B10/548H04B10/5561
Inventor 陈晓曼陈胜郑科佳
Owner GUANGXUN SCI & TECH WUHAN