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Directly modulated laser driving circuit and directly modulated laser system

A driving circuit and laser technology, applied in the field of optical communication, can solve problems such as poor eye pattern quality, low jitter performance, and insufficient bandwidth

Active Publication Date: 2020-07-07
ALUKSEN OPTOELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the embodiment of the present application provides a direct modulation laser drive circuit and a direct modulation laser system, aiming to solve the problems of insufficient bandwidth, poor eye diagram quality and low jitter performance in traditional technical solutions

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  • Directly modulated laser driving circuit and directly modulated laser system
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Embodiment Construction

[0033] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0034] see figure 1 , a schematic structural diagram of a direct modulation laser drive circuit provided by one of the embodiments of the present application. For the convenience of description, only the parts related to this embodiment are shown, and the details are as follows:

[0035]The directly modulated laser drive circuit in this embodiment is externally connected with the first input signal Input signal-1 and the second input signal Input signal-2, and the directly modulated laser drive circuit is connected to the power supply VCC through the first anti-interferenc...

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Abstract

The invention discloses a directly modulated laser driving circuit, which is externally connected with a first input signal and a second input signal. The directly modulated laser driving circuit is connected with a power supply and a laser diode. The directly modulated laser driving circuit comprises a current modulation module, a neutralizing module, a first anti-interference module and a secondanti-interference module, wherein the neutralizing module is provided with a neutralizing capacitor with parameters capable of being independently set. The directly modulated laser driving circuit adopts a separate optimization mode, different parameters are set for the capacitor in the neutralizing module for adjustment to eliminate the asymmetric bias caused by the laser diode load and the driving circuit, so that the bandwidth of the system is improved, the quality of an eye pattern obtained by system testing is improved, the jitter of the system is inhibited, and the problems of insufficient bandwidth, poor eye pattern quality and low jitter performance in the traditional technical scheme are solved.

Description

technical field [0001] The present application belongs to the technical field of optical communication, and in particular relates to a direct modulation laser drive circuit and a direct modulation laser system. Background technique [0002] At present, the traditional DC-coupled DML (Directly Modulated Laser) system needs to provide DC bias current to the laser, and the asymmetry of the anode and cathode drive circuits of the laser diode will lead to asymmetric bias. Due to the relatively low impedance of the laser diode, when the current changes rapidly, the parasitic inductance caused by the bonding wire will cause a higher impedance than the laser diode itself, resulting in severe transient peak waveforms in the time domain, seriously affecting the system The bandwidth, eye diagram and jitter performance obtained by system testing. [0003] Therefore, there are problems of insufficient bandwidth, poor eye diagram quality and low jitter performance in the traditional tech...

Claims

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Application Information

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IPC IPC(8): H01S5/042
CPCH01S5/042H01S5/0425H01S5/0427
Inventor 王昕向涛劳之豪袁亚兴商松泉刘德昂
Owner ALUKSEN OPTOELECTRONICS CO LTD