Optical power control method and device
A technology of optical power control and power, applied in the field of optical communication, can solve the problems of large fluctuation range of optical power deviation
Inactive Publication Date: 2016-11-16
HISENSE BROADBAND MULTIMEDIA TECH
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[0005] Embodiments of the present invention provide an optical power control method and device to solve the problem in the prior art that the optical power deviation fluctuation range of the EML laser is relatively large
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[0021] In order to make the technical problems, technical solutions and effects solved by the present invention clearer, the preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention. Invention is not intended to limit the present invention. And in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.
[0022] The EML laser mainly consists of a distributed feedback Bragg laser (DFB) and an electroabsorption modulator (EAM). When looking for a solution to the problem of large fluctuations in the optical power deviation of EML lasers within a certain temperature range, the inventors found that when the temperature of the light emitting component changes, the threshold current and slope efficiency will change,...
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The invention discloses an optical power control method and device, and aims to solve the problem of relatively large optical power deviation fluctuation range of an EML (Electro-absorption Modulated Laser) in the prior art. The method comprises the following steps: detecting the temperature of an environment in which a transmitter optical sub-assembly is positioned in an optical module; determining a temperature compensation value which is matched with the temperature of the environment in which the transmitter optical sub-assembly is positioned from a preset temperature compensation table according to the temperature of the environment in which the transmitter optical sub-assembly is positioned; and adjusting the temperature of the transmitter optical sub-assembly according to the temperature compensation value in order that a fluctuation range of output optical power of the transmitter optical sub-assembly conforms to a threshold value fluctuation range, wherein when the temperature of the transmitter optical sub-assembly is lowered, the output optical power of the transmitter optical sub-assembly is increased. The output optical power changes along with the change of the temperature of the transmitter optical sub-assembly, so that the output optical power of the transmitter optical sub-assembly can conform to an expected value through adjustment of the temperature of the transmitter optical sub-assembly at different temperatures of the environment according to the method.
Description
technical field [0001] Embodiments of the present invention relate to the field of optical communication technologies, and in particular, to an optical power control method and device. Background technique [0002] The performance of the EML (Electlro-absorption Modulated Laser) laser is limited by the ambient temperature (high and low temperature). If affected by the ambient temperature, the optical power of the EML laser under the same parameter conditions is not stable enough. Large fluctuation deviation. Due to the effect of thermal expansion and contraction, the coupling position of the internal components of the TOSA (Transmitter Optical Sub-Assembly) will change with the ambient temperature, resulting in differences in the output optical power of the TOSA at high and low temperatures. Generally speaking, the performance is that the optical power becomes smaller in a low-temperature environment, and the optical power becomes larger in a high-temperature environment. ...
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IPC IPC(8): H04B10/564
CPCH04B10/564
Inventor 王二锋
Owner HISENSE BROADBAND MULTIMEDIA TECH