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rof light receiving module with stable output amplitude

A technology of optical receiving module and output amplitude, applied in the field of optical communication, can solve problems such as inapplicability

Active Publication Date: 2021-05-07
WUHAN HUAGONG GENUINE OPTICS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The purpose of the present invention is to provide a ROF optical receiving module with stable output amplitude, which aims to solve the problem that the existing AGC scheme can only be used in the continuous wave working mode, when the system has both continuous mode transmission and burst pulse The problem that this scheme does not apply when the transmission is

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  • rof light receiving module with stable output amplitude
  • rof light receiving module with stable output amplitude
  • rof light receiving module with stable output amplitude

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Embodiment Construction

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] Such as Figure 4As shown, the embodiment of the present invention provides a ROF optical receiving module with stable output amplitude, including a photodetector 2, a resistor 3, an attenuator 5 and at least one amplifier, the photodetector 2 adopts a photodiode, and the resistor 3 One end is connected to the anode of the photodiode, the other end is grounded, each of the amplifiers and the attenuator 5 are connected in series and the input end of the ...

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Abstract

The invention provides a ROF optical receiving module with stable output amplitude, which includes a mirror current source, a photodetector, a resistor, an attenuator, a filter, a signal conditioning circuit and at least one amplifier, the photodetector adopts a photodiode, and one end of the resistor Connect with the anode of the photodiode, the other end is grounded, each amplifier and the attenuator are connected in series and the input end of the whole series is connected to the anode of the photodiode through a capacitor, and the output end is connected to the radio frequency signal output end; the input end of the mirror current source and The cathode of the photodiode is connected, the output end is connected with the input end of the filter, the output end of the filter is connected with the input end of the signal conditioning circuit, and the output end of the signal conditioning circuit is connected with the attenuator. The invention can compensate the difference of received optical power and the difference of responsivity of each detector caused by the inconsistency of each port of the transmission system, so that the output signal meets the requirement of amplitude consistency.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to an ROF optical receiving module with stable output amplitude. Background technique [0002] Such as optical fiber sensing, optical fiber wireless access, optical fiber radar, etc., optical radio frequency (or microwave) communication ROF (radio-over-fiber) has been widely used, and it also puts forward specific requirements for the performance indicators of optical fiber communication systems. Require. [0003] An existing distributed optical fiber transmission system, its main form is that the radio frequency signal modulates the laser and converts it into an optical signal output, (after optical amplification) is divided into several to thousands of optical signals by the optical splitter, and transmitted through the optical fiber Then enter the optical receiving module respectively, and convert back to the radio frequency signal output. This system requires tha...

Claims

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Application Information

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IPC IPC(8): H04B10/60
CPCH04B10/60
Inventor 王长虹黄文娟张勇罗传能
Owner WUHAN HUAGONG GENUINE OPTICS TECH
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