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An optical filter applied to twdm-pon adjustable receiving

A technology of TWDM-PON and optical filter, which is applied in the field of optical communication, can solve the problems of unfavorable batch production, high equipment dependence, large line dispersion, etc., and achieve the effects of cost control, good isolation and improved reliability

Active Publication Date: 2016-08-31
GUANGXUN SCI & TECH WUHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The three technologies can effectively solve the bandwidth bottleneck problem in the future market, but each has its own problems that need to be solved urgently. For example, increasing the single-wavelength rate in the first method will inevitably lead to greater line dispersion
This method is not only difficult to master, but also highly dependent on equipment, which is not conducive to mass production and forms an industrial scale

Method used

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  • An optical filter applied to twdm-pon adjustable receiving
  • An optical filter applied to twdm-pon adjustable receiving
  • An optical filter applied to twdm-pon adjustable receiving

Examples

Experimental program
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Effect test

no. 1 example

[0035] Take the 8-channel tunable optical filter as an example, such as figure 1 As shown, it includes a stepping motor 10, a packaging case 1, an incident collimator 2, a TFF filter 3, a linkage 4, a packaged APD chip 5, and a position sensor 6, wherein the linkage 4 is fixed on the stepping motor 10, and can move along the main shaft of the stepping motor 10, and its movement resolution is determined by the thread pitch of the main shaft and the step angle of the motor. The stepper motor 10 is fixed on the packaging shell 1. In this embodiment, 8 TFF filters 3 with different filter wavelengths can be used, and they are fixed on the linkage in sequence from long-wave to short-wave or from short-wave to long-wave in the order of filter wavelengths. 4 on the outer surface. Both the incident collimator 2 and the packaged APD chip 5 are separated from the stepping motor 10, and both the incident collimator 2 and the APD chip 5 are fixed on the packaging shell 1, and both are arr...

no. 2 example

[0039] Such as Figure 5 As shown, the TO-packaged APD chip 5 in the first embodiment is replaced with an output collimator 7, and the rest remains unchanged. In this embodiment, the output signal does not undergo photoelectric conversion, but directly The output in the form of signal also realizes the function of filtering, but the application is more flexible.

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Abstract

The invention relates to an adjustable-reception optical filter applied to a TWDM-PON. The optical filter comprises an optical path device, a transmission device, a position sensor and a packaging shell (1). The optical path device comprises TFF filter bodies (3), an incidence collimator (2) and a light receiver. The transmission device comprises a stepping motor (10) and a linkage device (4), the position sensor is connected with the linkage device (4), the linkage device (4) is installed on the stepping motor (10) in the fixation mode that the linkage device (4) can move along a main shaft of the stepping motor (10), and the stepping motor (10) is fixed to the packaging shell (1). The TFF filter bodies (3) are fixed to the linkage device (4), wherein the number of the TFF filter bodies (3) corresponds to the number of OLT downlink service signal wavelengths in the TWDM-PON; the TFF filter bodies (3) are provided with filter coatings corresponding to the OLT downlink service signal wavelengths; the TFF filter bodies (3) are arranged according to a filtering wavelength order. The incidence collimator (2) is concentric with the light receiver, and the axial connection line between the incidence collimator (2) and the light receiver passes through the centers of the TFF filter bodies (3). The adjustable-reception optical filter applied to the TWDM-PON is compact in structure and low in cost.

Description

technical field [0001] The patent of the invention relates to an optical filter, especially an optical filter for TWDM-PON (Time Wavelength Division Multiplexing-Passive Optical Network) adjustable reception, and the invention belongs to the field of optical communication. Background technique [0002] The demand for bandwidth for information transmission has been growing at an explosive rate. In order to meet the rapid development of network traffic, in the backbone network, 40Gbps and 100Gbps optical networks have begun commercial deployment, and 400Gbps or 1Tbps optical communication systems have also begun research. At the access network level, higher requirements are inevitably placed on network traffic and multi-service support. At present, the access network is mainly based on the passive optical network PON technology with a tree structure, and the passive optical network TDM-PON (time division multiplexing-Passive optical network) based on time division multiplexin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/293
Inventor 薛振峰孙莉萍肖清明白航李建万丹姜晋伟孙明超
Owner GUANGXUN SCI & TECH WUHAN