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ASK-FSK converter and conversion method

A technology of ASK-FSK and conversion method, which is applied in the field of ASK-FSK converter and conversion, can solve the problems that it is difficult to realize ASK-FSK high-speed conversion, and achieve the effect of high-speed ASK-FSK signal conversion

Active Publication Date: 2012-09-05
HUAWEI TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The above-mentioned ASK-FSK conversion scheme needs to convert the ASK optical signal into an electrical signal first, and then convert the electrical signal into an FSK optical signal by using the FSK modulation method, which involves photoelectric conversion and electro-optical conversion. limitation, so it is difficult to achieve high-speed conversion of ASK-FSK

Method used

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  • ASK-FSK converter and conversion method
  • ASK-FSK converter and conversion method

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Embodiment 1

[0038] Such as figure 2 As shown, the ASK-FSK converter provided by the embodiment of the present invention includes:

[0039] The beam splitter 11 receives the ASK optical signal and splits the ASK optical signal into a first ASK optical signal and a second ASK optical signal;

[0040] An optical generator 12, which generates continuous polarized light having a frequency different from that of the ASK optical signal;

[0041] The first optical coupler 13 is connected to an output end of the beam splitter 11 and the optical generator 12, and couples the first ASK optical signal to the continuous polarized light;

[0042] Polarization modulator 14, connected to the first optical coupler 13, when the polarization direction of the first ASK optical signal and the polarization direction of the continuous polarized light form a predetermined angle, use the cross polarization modulation effect to convert the continuous polarization Optically modulated into an optical signal that ...

Embodiment 2

[0046] image 3 As shown, for the embodiment of the present invention, the high-order nonlinear fiber is selected as the cross-polarization modulation medium, that is, the combination of the high-order nonlinear fiber and the polarizer is used as the ASK-FSK converter of the polarization modulator, including: Beamer Coupler1, laser diode LD2, polarization controller PC1, polarization controller PC2, optical coupler Coupler2, high-order nonlinear fiber HNLF, polarization beam splitter PBS, and optical coupler Coupler3; among them, the output of the polarization beam splitter PBS is to be used as a polarizer. In addition, the ASK-FSK converter provided in this embodiment further includes an optical delay device ODL.

[0047] Such as image 3As shown, in this embodiment, another laser diode LD1 is used to generate a high-speed ASK optical signal of 40Gbit / s. The LD1 has an operating wavelength of 1554.4nm and an input power of 20dBm; then the high-speed ASK optical signal is pa...

Embodiment 3

[0055] Figure 7 As shown, the semiconductor optical amplifier selected as the cross polarization modulation medium provided by the embodiment of the present invention, that is, the ASK-FSK converter using the combination of the semiconductor optical amplifier and the polarizer as the polarization modulator, includes: beam splitter Coupler1, External cavity laser ECL2, polarization controller PC1, polarization controller PC2, optical coupler Coupler2, semiconductor optical amplifier SOA, polarization beam splitter PBS, and optical coupler Coupler3; wherein, the output of the polarization beam splitter PBS is used as an analyzer device. In addition, the ASK-FSK converter provided in this embodiment further includes an optical delay device ODL.

[0056] Such as Figure 7 As shown, in this embodiment, another external cavity laser ECL1 is used to generate a 40Gbit / s high-speed ASK optical signal, and the operating wavelength of the ECL1 is 1557.9nm; then the high-speed ASK opti...

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Abstract

The invention discloses an ASK-FSK converter and a conversion method, which relate to the field of optical communication and are invented for solving the problem that fast conversion of an ASK optical signal into an FSK optical signal cannot be realized in the prior art. The embodiment of the invention provides the ASK-FSK converter, which comprises a beam splitter, a light generator, a first optical coupler, a polarization modulator and a second optical coupler. Based on the ASK-FSK converter, the ASK optical signal can be split into two paths, wherein one path of the ASK optical signal interacts with continuous polarized light in the polarization modulator to change the polarization state of the polarized light to convert the polarized light into an optical signal which is logically opposite to the ASK optical signal has a frequency different from that of the ASK optical signal; and then the optical signal which is logically opposite to the ASK optical signal is coupled with the other path of the ASK optical signal to obtain the FSK optical signal. The converter and the method are suitable for fast conversion of the ASK optical signal into the FSK optical signal.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to an ASK-FSK (amplitude shift keying modulation pattern to frequency shift keying modulation pattern) converter and conversion method. Background technique [0002] The Frequency-shift Keying (FSK) modulation format has been confirmed as a better modulation format in long-distance optical transmission. Compared with modulation formats such as Phase-shift Keying (PSK) and Amplitude-shift Keying (ASK), FSK shows the lowest sensitivity to fiber nonlinear damage, and the FSK modulation format Can support quadrature modulation with ASK modulation format. [0003] In the orthogonal ASK / FSK marking scheme of optical marking technology, the payload information in the optical packet switching network adopts FSK modulation. If each terminal signal is modulated by ASK, the code type conversion from ASK to FSK needs to be performed in the edge node router, so as to transmit the load info...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J14/00H04B10/12H04B10/2569H04B10/556
Inventor 迟楠王雪操时宜
Owner HUAWEI TECH CO LTD
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