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Externally modulated laser, passive optical communication device and system

A laser, external modulation technology, applied in lasers, laser components, optical multiplexing systems, etc., can solve the problem of increasing the power consumption of laser modules, reduce power consumption, solve high power consumption, and reduce hardware costs Effect

Active Publication Date: 2013-01-30
HUAWEI TECH CO LTD
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Problems solved by technology

[0003] In order to ensure that the electroabsorption modulated laser works within the range of 1575-1580nm specified by the International Standards Organization, a cooler is installed in the DFB laser to keep the DFB laser working at a fixed temperature, and the cooler will additionally increase the power of the laser module. consumption

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Embodiment Construction

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0039] Existing electro-absorption modulated lasers are mainly composed of DFB lasers and electro-absorption modulators. The DFB lasers are used to generate continuous laser light, and the electro-absorption modulators are used to convert high-speed electrical signals into high-speed optical signals.

[0040] Among them, the DFB grating in the DFB...

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Abstract

Embodiments of the invention provide an externally modulated laser, a passive optical communication device and a system. The externally modulated laser comprises a laser, which comprises a partially reflecting mirror, a gain medium and a filter, which form a laser oscillation cavity of the laser. The filter is used to filter lights that are emitted by the gain medium so as to generate light waves with a preset wavelength. The partially reflecting mirror is used to transmit a part of the generated light waves with the preset wavelength to the modulator so as to be modulated and to reflect the other part of the generated light waves with the preset wavelength to the gain medium. The invention solves the problem of great power consumption of conventional externally modulated lasers.

Description

technical field [0001] The invention relates to optical fiber communication technology, in particular to externally modulated lasers, passive optical communication equipment and systems. Background technique [0002] 10Gb / s externally modulated laser (EML: Externally Modulated Laser) is widely used in optical fiber communication technology, among which, electro-absorption modulated laser has become the most typical device due to its small size and fast modulation speed, and it is the key device of the next generation PON in the access network . According to the international standard ITU-TG987.3, the wavelength range of XG-PON is 1575-1580nm. The electro-absorption modulated laser is mainly composed of two parts: a distributed feedback (DFB: Distributed Feedback) laser and an electro-absorption modulator (EAM: Electra-absorption Modulator). The DFB laser is used to generate continuous laser light, and the electro-absorption modulator is used to convert high-speed The elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/106H04B10/155
CPCH01S5/14
Inventor 周小平
Owner HUAWEI TECH CO LTD
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