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Optical path switching device having wavelength selection function

A technology of wavelength selection and optical path, applied in the field of passive optical network, can solve problems such as impact, and achieve the effect of simple structure

Active Publication Date: 2010-09-22
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using a single optical switch for single-point control requires fewer control components and increases the cost of the network. However, the problem is that because multi-wavelength signals are transmitted on the same fiber in the main feeder of WDM-PON, a single switch switching action usually affects all wavelengths. At the same time, it will affect the service of the faulty ONU, and at the same time, the ONU of the normal working wavelength that has not failed will also be affected. In addition, the protection switching of a single optical switch can only guarantee the recovery of a single fiber failure.

Method used

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  • Optical path switching device having wavelength selection function
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  • Optical path switching device having wavelength selection function

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Description of text and symbols in graphics:

[0025]

[0026]

[0027] An optical path switching device with a wavelength selection function, with 1×2 ports on the outside, the single-port port is called 1-port, the dual-port ports are called 2-1 port and 2-2 port respectively, and the input wavelength range of 1 port is λ 1 ~λ m , through the internal connection, it can realize the separate communication between the 1 terminal and the 2-1 terminal and the 2-2 terminal, or the simultaneous communication between the 1 terminal and the 2-1 terminal and the 2-2 terminal. All wavelengths on one channel can pass through, and the other Wavelengths that meet the requirements on a channel can pass through.

[0028] like figure 1 Shown is the basic structure of an optical path switching device with a wavelength selection function, which includes a 1×2 optical c...

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Abstract

The invention discloses an optical path switching device having a wavelength selection function. The outside of the device is provided with a 1*2 port, and the inside of the device comprises a 1*2 optical coupler, a wavelength gating unit and an optical switch unit provided with at least 2*2 ports; a single-port end of the optical path switching device is connected with a single-port end of the optical coupler; one port of a double-port end of the optical coupler is connected with an input port of the wavelength gating unit; the other port of the double-port end of the optical coupler and an output port of the wavelength gating unit are connected with two ports of an input end of the optical switch unit respectively; and two ports of an output end of the optical switch unit are connected with the two ports of the double-port ends of the optical path switching device respectively. The optical path switching device has a simple structure, uses fewer components, and can realize a plurality of types of output combinations of input multi-wavelength optical wave signals. The optical path switching device can be used on optical path switching occasions requiring wavelength selection, such as protection switching of the wavelength selectivity in a wavelength division multiplexing passive optical network and the like.

Description

technical field [0001] The invention relates to a passive optical network, in particular to a protection switching device for a wavelength division multiplexing passive optical network. Background technique [0002] Optical fiber access technology is one of the main technologies to realize the next-generation broadband access network. It has the characteristics of high bandwidth, large capacity, high reliability, and good service quality, and it is convenient to realize multi-network integration of voice, data, and video. [0003] In the passive optical network (hereinafter referred to as PON) technology, there are currently two technologies: wavelength division multiplexing passive optical network (hereinafter referred to as WDM-PON) and time division multiplexing passive optical network (hereinafter referred to as TDM-PON). TDM-PON technology is relatively mature, with high bandwidth utilization rate and relatively low device cost, and has been widely used; while WDM-PON c...

Claims

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Application Information

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IPC IPC(8): H04B10/08H04Q11/00H04J14/02H04B10/032
Inventor 孙小菡樊鹤红
Owner SOUTHEAST UNIV