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Wavelength selection switcher

A wavelength selection and switcher technology, applied in the field of wavelength selection switchers, can solve the problems of increased device cost, difficulty in meeting practical benefits, poor structure, etc., and achieves the effect of reducing manufacturing difficulty

Inactive Publication Date: 2008-06-18
BROWAVE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

but Figure 3A In the latch state shown, the signal at the input terminal 301 only passes through the filter plate 342 once, so in the output terminal 302, λ 1 Signal Isolation Ratio Figure 2A and Figure 2B The structure shown is poor, and it is difficult to meet the actual needs. It is necessary to use a special high-isolation filter. Therefore, the cost of the device will inevitably increase and it is difficult to meet the actual benefits.

Method used

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Examples

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no. 1 example

[0045] In order to take into account the requirements of optical performance, structural simplification and component cost, the wavelength selective switcher of the first embodiment of the present invention is as follows Figure 4A and Figure 4B shown.

[0046] The wavelength selective switcher 400 is composed of four dual-fiber collimators 411-414, and each dual-fiber collimator uses an optical fiber to form a signal transmission channel, wherein the dual-fiber collimator 411 includes a channel for transmitting multiple wavelengths. signal lambda 1 , lambda 2 , lambda 3 , lambda 4 The first input channel 401 (input port); the dual-fiber collimator 412 includes the first output channel 402 (output port); the dual-fiber collimator 413 includes a channel for transmitting the first wavelength signal λ 1 'The second input channel 403 (plug-in end); the double-fiber collimator 414 includes the second output channel 404 (take-out end), and as shown in the figure, an optical fi...

no. 2 example

[0055] The wavelength selective switcher 500 of the second embodiment of the present invention is as Figure 5A and Figure 5B shown.

[0056] Similar to the first embodiment, the wavelength selective switcher 500 is composed of four dual-fiber collimators 511-514, which are used to input multi-wavelength signals λ 1 , lambda 2 , lambda 3 , lambda 4 The first input channel 501 (input end) and the second output channel 504 (take-out end) are located in the same double-fiber collimator 511, and the second input channel 503 (insert end) and the first output channel 502 (output end) are located in The same dual-fiber collimator 512, and the two optical fibers of the dual-fiber collimator 513, 514 are respectively fused to form the first connection channel 505 and the second connection channel 506, wherein the first input channel 501 is connected to the second output channel 504 and the second output channel 504 respectively. The first connection channel 505 is coupled, and th...

no. 3 example

[0065] The third embodiment of the present invention further simplifies the basic components of the wavelength selective switcher, such as Figure 6A and Figure 6B As shown, the wavelength selective switcher 600 is composed of two four-fiber collimators 610, 620, and the four-fiber collimator 610 includes 1 , lambda 2 , lambda 3 , lambda 4 The first input channel 601 (input port), the first output channel 602 (output port) and the first connection channel 605 formed by fusion of two optical fibers; the four-fiber collimator 620 includes a channel for transmitting the first wavelength signal λ 1 'The second input channel 603 (plug-in end), the second output channel 604 (take-out end) and the second connection channel 606 formed by fusion of two optical fibers, wherein the first input channel 601 is connected to the second output channel 604 and the second output channel 604 respectively. The first connection channel 605 is coupled, and the second input channel 603 is coupl...

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Abstract

The switcher composed of four collimators includes following parts. Signals of multiple wavelengths can be transferred between first input channel and first output channel. Second input channel can add a signal of first wavelength into the said signals of multiple wavelengths. Second output channel can picks up a signal in specific wavelength. A switching module possessing multiple pieces of filter is located between about said channels. The switching module is movable in stepping mode move to several preset positions. When the switching module is located at first position. Signal of wavelength input from first / second input channel irradiates on first / second filter. Except a specific signal of wavelength is received by second output channel, all other signal of wavelength input from first input channel enters into first connection channel, and forwards to second filter. Then the signal of wavelength together with first signal of wavelength enters into first output channel.

Description

technical field [0001] The invention relates to a wavelength selective switcher for optical communication, in particular to a wavelength selective switcher using a step-type switching component for wavelength selection. Background technique [0002] With the growth of various types of communication, the load traffic of optical fiber network is also increasing. Wavelength Division Multiplexing (WDM) provides a method that can double the amount of data transmitted in the existing optical fiber without having to reinstall it. A method for deploying new fiber optic lines. Using wavelength division multiplexing, we can carry different data streams at different wavelengths in one fiber. If DWDM (Dense Wavelength Division Multiplexing: DWDM) is used, a single optical fiber can even transmit more than 40 times the transmission capacity of the original optical fiber, greatly increasing the ability of the optical fiber network to transmit data. [0003] In the WDM technology, the Wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J14/02H04B10/12H04B10/02G02B6/293
Inventor 黄裕文王志明赵凤强
Owner BROWAVE CORP