Optical signal processing method and device for an optical network
A processing method and technology of a processing device, which are applied in optical fiber transmission, elimination of distortion/chromatic dispersion, transmission monitoring/testing/fault measurement system, etc., can solve the problem of signal distortion, large fluctuation of optical power in wavelength channels, physical damage of receiving optical modules, etc. question
Active Publication Date: 2016-09-07
ZTE CORP
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In the end, the optical power of the uplink signal of each wavelength channel in the TWDM-PON system will vary greatly
The current WDM-PON system, in order to achieve large-capacity and wide-area coverage services, must meet the requirements of long-distance transmission and large splitting ratio network deployment, which requires an increase in system power budget, and the need for optical amplification media in the middle of the network (such as EDFA Amplifier) to amplify the optical signal, so the difference in the optical power of each wavelength channel will be amplified by the optical amplification medium, resulting in large fluctuations in the optical power of each wavelength channel on the OLT receiver side, which will physically damage the receiving optical module of the OLT or signal distortion
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[0041] In the WDM-PON system, how to well transmit the multi-wavelength mixed optical signal of burst signal light and continuous signal light in the TDM-PON system has become an important issue restricting the development of the WDM-PON system. The WDM-PON system inherits the technical characteristics of the wavelength division system, and it is necessary to ensure the balance of the optical power of different wavelength channels, so that after optical amplification (even multi-stage optical amplification), the optical receiving optical power of all wavelength channels is at the level of the optical receiver. The best index range ensures the largest channel power margin and the signal-to-noise ratio requirements of the system's received signals. In addition, when the multi-channel light is burst signal light, the common optical amplifier (optical amplification medium) may generate a surge or the optical amplifier is turned on too slowly, resulting in distortion of the transmit...
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The present invention provides an optical signal processing method and device for an optical network. The method includes: when detecting that the signal light includes burst signal light, dividing the burst signal light into the first The burst signal light and the second burst signal light transmitted on the second optical fiber; delay processing is performed on the first burst signal light, the idle time slot of the second burst signal light is detected in real time, and when the second burst signal light is detected, When the idle time slot of the signal light is sent, the filling light that can fill the idle time slot of the second burst signal light is emitted; the first burst signal light after the delay processing is coupled with the optical signal on the second optical fiber, A quasi-continuous optical signal is formed. The above solution avoids the phenomenon of signal distortion caused by unbalanced power of each wavelength channel when the burst signal enters the optical amplification medium sometimes without it.
Description
technical field [0001] The invention relates to the field of optical access network communication, in particular to a burst signal optical processing method and device of a WDM-PON system. Background technique [0002] Wavelength Division Multiplexing-Passive Optical Network (WDM-PON) is a new passive optical network system based on multi-wavelength single-fiber transmission recently proposed. Its working principle is: each end user One wavelength channel is occupied separately, and multiple wavelength channels are transmitted in the same trunk fiber through wavelength division multiplexing. Its characteristic is that each end user exclusively enjoys a wavelength bandwidth resource. This not only greatly improves the bandwidth provided to individual users, but also makes full use of the wavelength bandwidth resources of the optical fiber, greatly expanding the total bandwidth of the passive optical network. [0003] Since TDM-PON has been applied on a large scale, the WDM-...
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IPC IPC(8): H04B10/2507H04B10/07
Inventor 张海明何子安黄新刚李长垒杨波马壮
Owner ZTE CORP