Bias control device and system for silicon-based Mach-Zehnder modulator based on pilot frequency method

A bias control and modulator technology, applied in instruments, nonlinear optics, optics, etc., can solve problems affecting the accuracy of the overall control system, and achieve simplified generation, improved bias control accuracy, and guaranteed bias control accuracy. Effect

Active Publication Date: 2022-01-07
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the existing bias control scheme based on the pilot method for the LiNbO3 Mach-Zehnder modulator is applied to the silicon-based Mach-Zehnder modulator, the phase shift caused by the pilot signal will produce additional nonlinear distortion, Thus affecting the accuracy of the overall control system

Method used

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  • Bias control device and system for silicon-based Mach-Zehnder modulator based on pilot frequency method
  • Bias control device and system for silicon-based Mach-Zehnder modulator based on pilot frequency method
  • Bias control device and system for silicon-based Mach-Zehnder modulator based on pilot frequency method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Ji Mahe silicon-Zehnder modulator bias control means based on pilot method, such as Figure 4 Shown, comprising: a monitoring module and a bias control circuit;

[0051] Monitoring module whose input terminal is connected to the output terminal of the silicon Ji Mahe Zehnder modulator, the optical signal outputting section for obtaining a silicon Ji Mahe Zehnder modulator, and converted to an electrical signal characterizing the optical power information;

[0052] Bias control circuit comprises: a pilot signal generation module and the bias voltage adjustment module;

[0053] The pilot signal generation module, whose output is connected to the silicon Ji Mahe-Zehnder modulator of the first heat transfer unit, for generating a pilot signal applied to the first heat adjuster;

[0054] Bias voltage regulating module, whose input terminal is connected to the monitoring module output terminal, its output terminal is connected to the silicon-Zehnder modulator Ji Mahe second heat t...

Embodiment 2

[0066] A silicone Ji Mahe Zehnder modulator system, such as Figure 4 and Image 6 It is shown, comprising: a silicon-based pilot Method Ji Mahe Zehnder modulator bias control Zehnder modulator Ji Mahe silicon and provided in the first embodiment apparatus;

[0067] Alternatively, in the present embodiment, the phase modulator silicon Ji Mahe-Zehnder modulator is formed of a silicon material; In some other embodiments of the present invention, the phase modulator silicon Ji Mahe Zehnder LiNbO3 modulator may also be , InP and other materials can be performed heterogeneously integrated with the silicon constituting the platform;

[0068] Alternatively, in this embodiment, Mach-Zehnder modulator and a spectral beam combiner couplers may be 3dB coupler and Y-coupler configuration; In some other embodiments of the present invention, may also be a multimode interference having a spectrophotometric instrument, such as any of a photon of light constituting the combined module;

[0069]In or...

Embodiment 3

[0072] An optical IQ modulator system based on silicon-based Mach Zendel modulator, such as Figure 7 As shown, comprising: an optical IQ modulator based on a silicon-based Mach Zender modulator and a pilot-based silicon-based Mach Zendel modulator bias control device.

[0073] like Figure 7 As shown, based on the optical IQ modulator of the silicon-based Mach Zendel modulator, two silicon-based Mach Zeng Del modulators and additional thermostats (ie Figure 7 The thermostat 1) and the coupler are constituted; one of the silicon-based Mach Zeng Del modulators includes two different thermostats, ie Figure 7 Thermostat 2 and the heat regulator 3; another silicon-based Mah Herd Deller modulator also includes two different thermostats, ie Figure 7 Thermostat 4 and the thermostat 5;

[0074] Similar to the above-described Embodiment 1, in the present embodiment, the bias control device includes: monitoring module and bias control circuit;

[0075] Monitor module, its input is connected t...

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Abstract

The invention discloses a silicon-based Mach-Zehnder modulator bias control device and system based on a pilot frequency method, belonging to the field of integrated photonic system control, including: a monitoring module and a bias control circuit; a monitoring module, the input end of which is connected to a silicon The output terminal of the Kimach-Zehnder modulator, which is used to obtain part of the output optical signal and convert it into an electrical signal representing optical power information; the bias voltage control circuit includes: a pilot signal generation module, whose output terminal is connected to the silicon-based Mach-Zehnder The first thermal regulator of the modulator, which is used to generate a pilot signal and apply it to the first thermal regulator; the bias voltage adjustment module, whose input terminal is connected to the output terminal of the monitoring module, and whose output terminal is connected to the silicon-based Mach Zeng The second thermal regulator of the Del modulator is used to determine the current bias point information according to the electrical signal, and generate a corresponding bias voltage, which is applied to the second thermal regulator to compensate for the drift of the bias point. The invention can improve the bias voltage control precision of the silicon-based Mach-Zehnder modulator.

Description

Technical field [0001] The present invention pertains to an integrated control subsystem, and more particularly, to a method of silicon-based pilot Ji Mahe Zehnder modulator bias control device and system. Background technique [0002] Traditional LiNbO3 Mach-Zehnder modulator as a high-bandwidth, low-power, low-chirp performance electro-optic modulator, having a very wide range of applications in the field of optical communications, microwave photonic, optoelectronic oscillator. However, due to environmental temperature fluctuations, and the uneven distribution of the charge accumulation and other reasons, the bias point of LiNbO3 Mach-Zehnder modulator drift often occurs to some extent, thereby deteriorating transmission characteristics, affect the function of the overall system modulation. To solve this problem, often use closed loop feedback control scheme to shift the bias point of the modulator real-time tracking and accordingly to compensate for drift amount, thereby stabi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/01G02F1/21
CPCG02F1/0123G02F1/21
Inventor 谭旻汪宇航
Owner HUAZHONG UNIV OF SCI & TECH
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