Optical branching device and passive optical network system
An optical splitter and branch technology, applied in the field of wireless transmission, can solve the problem that the splitting ratio of the optical splitter cannot be adjusted, etc.
Active Publication Date: 2016-05-18
CHINA MOBILE COMM GRP CO LTD
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[0009] The technical problem to be solved by the present invention is to provide an optical splitter and a passive optical network system to solve the problem that the splitting ratio of the optical splitter cannot be adjusted in the prior art
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[0052] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.
[0053] The present invention aims at the problem that the light splitting ratio of the optical splitter in the prior art cannot be adjusted, and provides an optical splitter, such as figure 2 and image 3 shown, including:
[0054] At least one wavelength coupling unit (WDC) 1 that adjusts the splitting ratio according to the input wavelength, the waveguide structure 2 of the wavelength coupling unit 1 includes a power distribution area 3, an optical path difference area 4 and a mode recombination distribution area 5; the incident light P0 passes through the The power distribution area 3 is divided into two optical signals with equal optical power, and after the two optical signals pass through the optical path difference area 4 (the optical path diffe...
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The invention provides an optical branching device and a passive optical network system. The optical branching device comprises at least one wavelength coupling unit for adjusting a splitting ratio according to one input wavelength, and the wave guide structure of the wavelength coupling unit comprises a power distribution area, an optical path difference area and a mode reconstruction distribution area; and incident light is divided into two optical signals with equal optical power via the power distribution area, the two optical signals, after passing through the optical path difference area, are multiplexed at the mode reconstruction distribution area, and a wave guide transmission mode corresponding to the optical path difference of the optical path difference area is formed. According to the scheme provided by the invention, through arrangement of the wavelength coupling unit adjusting the splitting ratio according to the input wavelength, the purpose of correspondingly changing the splitting ratio according to input optical signals with different wavelengths is realized.
Description
technical field [0001] The invention relates to the technical field of wireless transmission, in particular to an optical splitter and a passive optical network system. Background technique [0002] Optical splitters are optical splitters widely used in optical communication systems such as PON (passive optical network) and optical signal monitoring. [0003] The splitting ratio refers to the number of branches of the optical splitter. The split ratio represents the split ratio of each branch. In the prior art, the optical splitter is an optical splitter with a fixed splitting ratio, ranging from 1:2 to 1:128, 2:2 to 2:128, and the internal structure is a multi-stage 1:2 wavelength insensitive coupler Cascade implementations such as figure 1 shown. Among them, the wavelength-insensitive coupler generally adopts the Y bifurcation structure. For input optical signals of different wavelengths, the number of branches and the splitting ratio of the optical splitter remain un...
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IPC IPC(8): H04J14/02G02B6/125
Inventor 张德朝
Owner CHINA MOBILE COMM GRP CO LTD