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Light top adjusting device

An optical modulation and modulator technology, applied in the field of optical communication, can solve the problem of high cost of channel monitoring solutions, achieve the effects of protecting the life of the detector, improving the extinction ratio, and reducing the cost of operation and maintenance

Active Publication Date: 2022-02-11
金雷
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the embodiment of the present invention provides an optical ceiling adjustment device to solve the problem of the relatively high cost of the channel monitoring solution in the semi-active technology in the prior art technical issues

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Embodiment Construction

[0023] As mentioned in the background art, both internal modulation and external modulation schemes face the problem of high cost. Among them, the internal modulation is to combine the laser light source and the modulator into one; the external modulation is to use the coupling of the laser and the external modulator to realize the transmission of the optical signal.

[0024] In the internal modulation scheme, semiconductor lasers are usually used, and the output rate of semiconductor lasers is inversely proportional to the length of the cavity; if a higher frequency is used, it is difficult to further increase the optical power output. Generally, 1-3% of the modulation amplitude of the optical modulation is used, and when the modulation amplitude of 3% is used, the pressure on the transmitting end is huge, and the quality of the optical eye diagram at the transmitting end of the color light module is deteriorated, such as the margin of the optical eye diagram template becomes ...

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Abstract

The invention discloses a light top adjusting device, and the device comprises a laser, a light top adjusting circuit, a Mach-Zehnder modulator and a Mach-Zehnder driver. The light top adjusting circuit receives an externally input modulation signal and performs pulse width modulation to obtain a light top adjusting signal driving current; the laser outputs a light beam with a light top adjusting signal according to the light top adjusting signal driving current and the driving current; and the Mach-Zehnder modulator modulates the light beam with the light modulation signal according to the voltage modulation signal of the Mach-Zehnder driver to obtain a main signal with the light modulation signal. According to the invention, the modulation signal is subjected to pulse width modulation by using the light top modulation circuit to obtain the light top modulation signal driving current, so that the controllable linear output modulation of the light top modulation signal is realized; meanwhile, the Mach-Zehnder modulator can directly modulate the light beam with the light modulation signal according to the voltage modulation signal, so the stable output of the main signal is realized.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to an optical ceiling adjustment device. Background technique [0002] With the advent of the 5G era, in order to seize market opportunities, major operators have vigorously promoted the construction of 5G networks, and various networking methods for 5G fronthaul have been continuously optimized and evolved. Based on cost and fiber resource considerations, the 5G fronthaul solution is evolving from the traditional fiber direct drive solution to the wavelength division multiplexing solution. WDM schemes can be divided into three types: passive WDM, semi-active WDM, and active WDM. Among the three solutions, the cost of passive WDM is the lowest, and the application deployment is the fastest. However, during the deployment process, it cannot be effectively monitored, and its shortcomings of poor maintainability are gradually exposed. In order to solve this problem, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/50H04B10/54
CPCH04B10/5051H04B10/541
Inventor 金雷
Owner 金雷
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