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Optical transmitter and optical module

A technology of optical transmitter and laser, which is applied in the field of optical communication, can solve the problems of the time influence of DBR laser on and off, affecting the stability of DBR laser laser wavelength, affecting the stability of ONU wavelength, etc., to achieve the effect of wavelength stability

Active Publication Date: 2018-04-06
HISENSE BROADBAND MULTIMEDIA TECH
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Problems solved by technology

[0005] The present invention provides an optical transmitter and an optical module to solve the problem of further affecting the stability of the laser wavelength emitted by the DBR laser and seriously affecting the wavelength stability of the ONU due to the large impact on the turn-on and turn-off time of the DBR laser.

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  • Optical transmitter and optical module
  • Optical transmitter and optical module
  • Optical transmitter and optical module

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Embodiment Construction

[0022] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the drawings in the embodiments of this application. Obviously, the described The embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work should fall within the protection scope of this application.

[0023] With the development of optical communication technology, in order to meet users' greater bandwidth requirements and reduce the cost of large-scale deployment of extremely fast broadband, operators have gradually applied TWDM (Time Wavelength Division Mutiplexing) technology to ONUs. TWDM technology, as its name implies, is a new technology that ...

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Abstract

The invention discloses an optical transmitter and an optical module. The optical transmitter comprises a laser driver and a DBR laser, wherein the input end of the laser driver is used for receivinga burst control signal; the first output end of the laser driver is grounded, and the second output end is electrically connected with the anode of the DBR laser; the first differential switching endof the laser driver is electrically connected with a first working power supply and the anode of the laser. The first output end is grounded and the second output end is electrically connected with the anode of the laser, so that the laser driver can suck the bias current of the anode of the laser only through the second output end, is connected to the anode of the DBR laser through the first differential switching end to realize rapid turn-on and turn-off of the laser, satisfies the emission of laser with a specific wavelength through the control on the second output end, and effectively improves the wavelength stability of an ONU.

Description

Technical field [0001] The present invention relates to the field of optical communication technology, in particular to an optical transmitter and an optical module. Background technique [0002] With the development of optical communication technology, PON (Positive Optical Network, passive optical network) systems are widely used as optical access systems. The PON system generally includes ONT (Optical Network Terminal, optical network terminal) equipment and multiple ONUs (Optical Network Unit, optical network unit). Each ONU is usually equipped with an optical module, which is connected to the ONT equipment and receives downstream via optical fiber. For optical signals or transmit upstream optical signals, the lasers of multiple ONU optical modules share the same upstream optical channel. Take the optical module that emits upstream optical signals as an example. The ONU mainly includes a laser and a laser driver. The laser driver is used to receive the PON-MAC (Passive Optic...

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Application Information

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IPC IPC(8): H04B10/50H04B10/572
CPCH04B10/503H04B10/572
Inventor 李明薛登山王力赵其圣
Owner HISENSE BROADBAND MULTIMEDIA TECH
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