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Phase-shift binary transmission coder, phase regulator and optical network cell

A phase modulator, binary technology, applied in the field of phase-shifted binary transmission encoder, which can solve the problems of slow triggers and inaccurate delay elements.

Inactive Publication Date: 2006-12-20
ALCATEL LUCENT SAS
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Delay elements are imprecise due to technology variations, triggers are too slow

Method used

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  • Phase-shift binary transmission coder, phase regulator and optical network cell
  • Phase-shift binary transmission coder, phase regulator and optical network cell
  • Phase-shift binary transmission coder, phase regulator and optical network cell

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Embodiment Construction

[0028] Those of ordinary skill in the art will realize that the following description of the present invention is only illustrative and should not constitute a limitation in any respect. Other embodiments of the present invention will easily introduce themselves to those skilled in the art through the disclosed research.

[0029] Figure 4 The circuit according to the invention is shown. The circuit includes an XOR gate and two transparent D flip-flops, an upper transparent D flip-flop L1 and a lower transparent D flip-flop L2. The circuit has an input In, a clock input Clk and an output Out.

[0030] The clock input Clk is connected to the transparent D trigger clock input C of the transparent D flip-flops L1 and L2. The input In is connected to the input D of the lower transparent D flip-flop L2. The lower transparent D flip-flop L2 has a lower transparent D flip-flop output B. The output Out is connected to the input D of the transparent D flip-flop L2. The upper transparent D...

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PUM

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Abstract

The invention relates to a phase shifted binary transmission encoder with data input and data output, where the phase shifted binary transmission encoder includes an exclusive or gate having two inputs and one output, the output of the exclusive or gate being the output of the Phase shifted binary transmission encoder, where one input of the exclusive or gate is connected with the output via a first delaying element and the other input of the exclusive or gate is connected with the data input via a second delay element, both delaying elements being connected with a clock input, wherein the delay elements are transparent D flip-flops. Furthermore the invention relates to a phase modulator and an optical network element for phase shaped binary transmission.

Description

Technical field [0001] The invention relates to a phase modulator with a frequency higher than 10 GHz. Specifically, the present invention relates to a phase-shifted binary transmission encoder including an exclusive OR gate and a flip-flop. Background technique [0002] Optical networks are facing ever-increasing bandwidth requirements and ever-decreasing fiber availability. Based on the optical layer appearing in the transmission network, the optical network can provide more capacity and reduce costs. [0003] As with any new technology, many problems also arise with the use of optical networks. Higher spectral density requires that the frequency spectrum of the modulated signal be narrowed in order to leave room for filtering. Therefore, new modulation formats that combine good transmission characteristics with higher spectral efficiency have been studied. The so-called phase-shifted binary transmission (PSBT) is based on a combination of amplitude modulation and phase modulat...

Claims

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Application Information

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IPC IPC(8): H03M5/04H04B10/04H04B10/50H04L25/497
CPCH04L25/497H04B10/5055
Inventor 汉斯·约阿希姆·赖歇尔特
Owner ALCATEL LUCENT SAS
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