发明名称 |
Adaptive Compensation Circuitry for Suppression of Distortions Generated by the Dispersion-Slope of Optical Components |
摘要 |
A distortion compensation circuit compensates for the distortions generated by the dispersion-slope of an optical component and the frequency chirp of an optical transmitter. The dispersion compensation circuitry can be utilized in the optical transmitter, the optical receiver and/or at some intermediate point in a fiber-optic network. One embodiment of the compensation circuit utilizes a primary electrical signal path that receives at least a portion of the input signal and a delay line; and a secondary signal path in parallel to the primary path that receives at least a portion of the input signal and including: an amplifier with an electrical current gain that is proportional to the dispersion-slope of the optical component., an optional RF attenuator, an optional delay line, a “squarer” circuit, and a “differentiator” circuit. Another embodiment of the disclosure performs simultaneous, and independent, compensation of second-order distortions generated by both the dispersion-slope of a first optical component and the dispersion of a second optical component. Other embodiments of the disclosure perform adaptive predistortion for compensation of distortions generated by the dispersion-slope of a first optical component and the dispersion of a second optical component to maintain optimum compensation even if the dispersion properties of the optical components change with time. |
申请公布号 |
US2016056895(A1) |
申请公布日期 |
2016.02.25 |
申请号 |
US201514876771 |
申请日期 |
2015.10.06 |
申请人 |
AURORA NETWORKS, INC. |
发明人 |
Mysore Sudhesh |
分类号 |
H04B10/50;H04B10/564;H04B10/40;H04B10/2513 |
主分类号 |
H04B10/50 |
代理机构 |
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代理人 |
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主权项 |
1. An apparatus, comprising a distortion compensation circuit to substantially cancel composite second order distortion generated by at least 1) a dispersion-slope of an optical component and 2) frequency chirp of an optical transmitter, the distortion compensation circuit including
a 1×n electrical coupler; a primary signal path including an RF delay line coupled to the 1×n coupler, the primary signal path receiving a first portion of an input signal; a n×1 electrical coupler coupled to the primary signal path; and a secondary signal path coupled to both i) the 1×n coupler and ii) the n×1 coupler and in parallel to the primary signal path, the secondary signal path receiving a second portion of the input signal and including
an RF delay line,an RF attenuator,an amplifier with electrical current gain proportional to the dispersion-slope of the optical component,a circuit that squares the signal current anda circuit whose output is the derivative of its input signal. |
地址 |
San Jose CA US |