Reflection-type optical attenuator and method for attenuating power of optical waves
An optical attenuator and reflective technology, which is applied in the coupling of optical waveguide, light guide, optics, etc., can solve the problems of deteriorating PDL and coating difficulty, and achieve effective compensation, reduce WDL index, and increase coating difficulty.
Inactive Publication Date: 2014-02-26
SOLOREIN TECH
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Problems solved by technology
However, the above measures will bring difficulties to the coating (the glass slope used to increase the dispersion is coated with an anti-reflection coating) and deteriorate the PDL (Polarize Dependent Loss, polarization dependent loss) index
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[0028] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0029] In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.
[0030] Secondly, the present invention is described in detail in combination with schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross-sectional view showing the device structure will not be partially enlarged according to the gener...
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The invention provides a reflection-type optical attenuator. The reflection-type optical attenuator comprises an input optical fiber, a lens, a reflecting mirror and an output optical fiber, and further comprises a diaphragm arranged between the lens and the reflecting mirror, the diaphragm is used for partially covering optical waves, the covered energy of the optical waves with large wave lengths is more than that of the optical waves with small wave lengths so that the aim of reducing the WDL of the optical attenuator can be achieved. The diaphragm is arranged between the lens and the reflecting mirror of the optical attenuator, the diaphragm is used for covering part of the optical waves, the covered energy of the long waves is more than that of the short waves, and therefore the coupling efficiency of the long waves and the coupling efficiency of the short waves are close or equal, and the WDL is effectively compensated. In addition, due to the fact the method of adding chromatic dispersion is prevented from being adopted, the caused problems of film plating difficulty and PDL increasing are avoided, and therefore on the premise of not increasing the film plating difficulty and not deteriorating PDL indexes, the WDL indexes in the optical power attenuation process are reduced.
Description
technical field [0001] The invention relates to the technical field of optical fiber communication, more specifically, to a reflective optical attenuator and a method for attenuating the power of light waves. Background technique [0002] In the optical fiber communication system, there are many scenarios that need to reduce the power of the optical signal, such as: the optical receiver is very sensitive to the overload of the optical power, the input power must be controlled within the input range of the optical receiver to prevent its saturation; the front of the optical amplifier The balance between the input power of different channels can prevent the input power of one or some channels from being too large and the gain saturation of the optical amplifier. [0003] The optical attenuator can attenuate the expected power of the optical signal according to the user's requirements. Optical attenuators include mechanical optical attenuators, magneto-optical attenuators, MEM...
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IPC IPC(8): G02B6/26
CPCG02B6/266
Inventor 陈定康李朝阳
Owner SOLOREIN TECH