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Optical path switching

A path and light source technology, applied in the direction of optical multiplexing system, optical fiber transmission, multiplexing communication, etc., can solve the problems of difficult implementation and high loss

Active Publication Date: 2013-11-13
贰陆公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, however, the switch still has to support high optical power, again resulting in high losses
This arrangement would also require a depolarization technique for the laser, which is difficult to implement and would require a polarization maintaining (PM) switch

Method used

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Embodiment Construction

[0026] figure 2 is a schematic diagram of an amplifier node 200 with a Raman pump unit 220 having two main lasers 203 , 212 and two auxiliary lasers 204 , 213 . The node 200 includes a switch 205, which may be coupled to an EDFA or other amplifying device 201 as appropriate. The node also includes a main optical fiber 202 and an auxiliary optical fiber 207 . The switch 205 is configured to switch an optical path between the main optical fiber 202 and the auxiliary optical fiber 207 . Optical signal 208 normally travels along main fiber 202 . However, when the main fiber 202 requires maintenance or repair processing, the switch 205 allows the optical signal 208 that was previously entering the amplifier 202 from the main fiber 202 to now pass the optical signal 208 on the auxiliary fiber 207 for delivery to Amplifier 201. Lasers 2013 , 204 , 212 and 213 may provide counter-propagating pump light 210 , 211 into optical fibers 202 , 207 . The main lasers 203 , 212 are arran...

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PUM

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Abstract

A light source package is disclosed for a Raman amplifier node 300 having a primary optical fibre 302 for carrying an optical signal and a secondary optical fibre 307 for carrying the optical signal when the signal is rerouted from the primary optical fibre. The light source package includes a primary light source 315 for emitting light into the primary optical fibre when the optical signal is carried by the primary optical fibre to induce Raman gain of the optical signal, and a secondary light source 316 for emitting light into the secondary optical fibre when the optical signal is carried by the secondary optical fibre to induce Raman gain of the optical signal.

Description

technical field [0001] The present invention relates to optical path switching, especially switching between optical fibers when using distributed Raman amplification. Background technique [0002] In this specification, the term "light" will be used in the sense applied to optical systems, which means not only visible light, but also electromagnetic radiation having wavelengths outside the visible range. [0003] In an optical network, if a fiber in a device or operating span is damaged, the path can be changed to traffic along another path when the damage is repaired. It is also possible to upgrade the devices in the system by using alternative optical transmission paths again without affecting the communication. In some components this has led to optical networks being designed in mesh or in ring topologies. In some networks, there may be auxiliary fibers available next to the main fiber used in normal operating conditions. This auxiliary fiber can be used for example ...

Claims

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Application Information

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IPC IPC(8): H04B10/032
CPCH04B10/032H04Q11/0003H04B10/25H04Q2011/0043H04J14/0287H04B10/038
Inventor P·威格利伊恩·彼得·麦克林
Owner 贰陆公司