Passive optical network system and device thereof
A passive optical network and optical network unit technology, applied in the field of passive optical network and its devices, can solve the problems of low output optical power of EML, increased manufacturing cost, unstable optical power, etc., to reduce dispersion effect and realize cost Effect of low and good temperature performance
Active Publication Date: 2017-01-18
ALCATEL LUCENT SHANGHAI BELL CO LTD
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Problems solved by technology
However, since this modulation method is based on electroabsorption, the output optical power of EML will be quite low
In order to compensate the on-chip loss and fiber coupling loss, it is usually necessary to integrate an optical amplifier to work together, which will significantly increase the manufacturing cost
In addition, due to the temperature-sensitive characteristics of electro-absorption modulation, it causes system instability during wavelength tuning and even affects transmission characteristics, such as optical power instability, low extinction ratio, and limited transmission distance.
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[0035] In the following detailed description of the preferred embodiment, reference is made to the accompanying drawings which form a part hereof. The accompanying drawings show, by way of example, specific embodiments in which the invention can be practiced. The illustrated embodiments are not intended to be exhaustive of all embodiments in accordance with the invention. It should be noted that although the steps of the relevant methods in the present invention are described in a specific order herein, this does not require or imply that these operations must be performed in this specific order, or that all shown operations must be performed to achieve the desired As a result, instead, the steps described herein may be performed in a different order. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step for execution, and / or one step may be decomposed into multiple steps for execution.
[0036] figure 1It is a design diag...
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The invention provides an optical network unit in a passive optical network system and an uplink wavelength generation method of the optical network unit. The optical network unit comprises a semiconductor laser and a semiconductor optical amplifier, and is characterized in that the semiconductor laser is used for selecting and locking a specific wavelength from a plurality of wavelengths of external injection light and transmitting a single-mode coherent light source of the specific wavelength; and the semiconductor optical amplifier is used for generating and amplifying a wide-spectrum light source and modulating uplink data to the single-mode coherent light source of the specific wavelength, wherein the semiconductor optical amplifier is a quantum dot semiconductor optical amplifier; and the semiconductor laser can adopt an FP laser to select and lock a specific wavelength from the plurality of wavelengths of the external injection light through bias tuning. The plurality of wavelengths of the external injection light form a plurality of reflection wavelengths via a remote node through reflection. The method provided by the invention is low in implementation cost, conducive to commercial implementation and high in output power, and meets high-speed uplink data modulation requirements and colorless performance of the PON (Passive Optical Network) system.
Description
technical field [0001] The present invention relates to the technical field of communication, in particular to a passive optical network in an access network system and a device thereof. Background technique [0002] With the rapid increase of Internet traffic, NGPON2 (Next Generation Passive Optical Network) is currently being widely explored. Among them, TWDM-PON (Time Division and Wavelength Division Multiplexing Passive Optical Network) has been selected as the solution of NGPON2 basic technology. It requires the downlink aggregation rate to reach at least 40Gb / s; the uplink aggregation rate to reach at least 10Gb / s, and to support at least 20km of passive transmission and at least a splitting ratio of 1:64. However, as new applications continue to emerge, such as online video chat / conference, online games, high-definition IPTV, digital cinema, etc., each user's demand for uplink bandwidth will continue to increase. In addition, another major application of NGPON2 is t...
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IPC IPC(8): H04B10/50
Inventor 孙晓
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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