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Optical comb filter

A filter and optical comb technology, which is applied in the field of optical communication devices, can solve the problems of small channel bandwidth and low bandwidth utilization rate, and achieve the effect of realizing rectangular shape and improving bandwidth utilization rate

Inactive Publication Date: 2015-03-25
O NET COMM (SHENZHEN) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The MGTI-type optical comb filter usually uses a GT cavity structure to achieve flat top, but the channel bandwidth is small and the bandwidth utilization rate is low.

Method used

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  • Optical comb filter

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Embodiment Construction

[0017] The working principle of the optical comb filter with low dispersion of the present invention will be further described below with reference to the accompanying drawings.

[0018] Such as figure 1 As shown, the present invention provides an optical filter, including

[0019] (1) beam splitter 10, described beam splitter 10 adopts quartz or other optical glass as substrate, and is coated with the film of 50:50 splitting ratio on the substrate;

[0020] (2) The first GT resonant cavity 20 includes transparent solid blocks 201, 202 and spacers 211 and 212 for separating the transparent solid blocks 201 and 202, wherein the transparent solid blocks 201, 202 and spacers 211, 212 form a void Cavity 221.

[0021] Wherein, a through hole 202a is provided on the transparent solid block 202, and the through hole 202a communicates with the cavity 221, and the cavity 221 is supplemented or released with gas through the through hole 202a, so as to control the gas pressure of the c...

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Abstract

The invention provides an optical comb filter which comprises an input and output collimator, an output collimator, a beam splitter, a first GT resonant cavity, a second GT resonant cavity and a third GT resonant cavity. The GT resonant cavities comprise transparent solid blocks coated with film layers and interval portions, wherein the transparent solid blocks are each provided with a through hole, and the transparent solid blocks and the interval portions form cavities respectively. By means of the optical comb filter, insertion loss curve rectangularization is achieved, and the bandwidth usage efficiency is high.

Description

technical field [0001] The invention relates to the technical field of optical communication devices, in particular to the improvement of a GT cavity interference filter for filtering optical signals. Background technique [0002] With the rapid development of information communication, the information exchange of voice, image and data is increasing day by day. Especially with the wide application of the Internet, people have put forward higher requirements for broadband communication. In order to meet people's demand for broadband communication with a low-cost, high-quality system in the shortest possible time, Wavelength Division Multiplexing (WDM) technology is widely used. [0003] Another way to increase the transmission capacity of optical fiber is to further reduce the channel spacing. At present, according to the regulations of the International Telecommunication Union (ITU), the channel spacing is 100Hz or 200Hz. If you want to expand the original system at a low ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/293
CPCG02B6/29358G01B9/02008G02B1/11G02B5/284G02B5/288G02B6/293G02B6/29349G02B6/29361G02B6/421G02B6/4215G02B26/001G02B26/004G02F2203/54G02F2203/56H04J14/02G02B6/29335
Inventor 黄曙亮华一敏李连城
Owner O NET COMM (SHENZHEN) LTD
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