Slow light caching shaper for adjustable loop consisting of N paths of optical signals

An optical circulator and optical signal technology, which is applied in the field of optical communication, can solve problems such as high insertion loss and polarization dependence, difficulty in connecting photonic crystals and single-mode optical fibers for communication, and high cost, so as to reduce network construction costs and solve The effect of network congestion and low cost

Inactive Publication Date: 2014-03-12
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For slowing down the speed of light, the most effective method is the electromagnetically induced transparency (EIT) technology based on the quantum coherence effect, but because it needs to be carried out at ultra-low temperature (close to absolute zero), the experimental system is too complicated and expensive
In addition, there are methods to slow down the speed of light by using high-dispersion two-dimensional waveguide photonic crystals, such as [Lu Peixiang, Yang Zhenyu, Chen Wei, etc., "An all-optical buffer based on photonic crystal fiber", National Invention Patent, 200810047325.X ], but it is difficult to connect photonic crystals to single-mode optical fibers for communication, which have high insertion loss and polarization dependence
In addition, some people have recently proposed the use of broadband stimulated Brillouin scattering, stimulated Raman amplification or nonlinear Bragg grating to slow down the speed of light, but these schemes are still in the stage of theoretical analysis and are far from being practical. Degree

Method used

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  • Slow light caching shaper for adjustable loop consisting of N paths of optical signals
  • Slow light caching shaper for adjustable loop consisting of N paths of optical signals
  • Slow light caching shaper for adjustable loop consisting of N paths of optical signals

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Embodiment approach 1

[0020] N-channel optical signal adjustable loop slow optical buffer shaper, N is the structure of an integer ≥ 2, such as figure 1 , the slow light buffer shaper includes: optical signal 1, first to Nth pump light sources 21, 22, ..., 2N, first to Nth adjustable optical attenuators 31, 32, ..., 3N, the first One, the second erbium-doped fiber amplifier 41, 42, N × 1 optical coupler 5, the first and second optical circulators 61, 62, 2 × 2 optical switch 7, single-mode fiber 8, optical isolator 9 and optical filter device 10.

[0021] The connection of each device is as follows:

[0022] The optical signal 1 is connected to the first interface 611 of the first optical circulator 61 through the first erbium-doped fiber amplifier 41 .

[0023] The first to Nth pump light sources 21, 22, ..., 2N sequentially pass through the first to Nth adjustable optical attenuators 31, 32, ..., 3N and the N number of N×1 optical couplers 5 The bifurcated ports are connected, and the one-word...

Embodiment approach 2

[0027] N-channel optical signal adjustable loop slow optical buffer shaper, N=1 structure, such as figure 2 , the slow light buffer shaper includes: optical signal 1, the first pump light source 21, the first adjustable optical attenuator 31, the first and second erbium-doped fiber amplifiers 41, 42, the first and second optical circulators 61, 62, 2×2 optical switch 7, single-mode optical fiber 8, optical isolator 9 and optical filter 10.

[0028] The connection of each device is as follows:

[0029] The optical signal 1 is connected to the first interface 611 of the first optical circulator 61 through the first erbium-doped fiber amplifier 41 .

[0030] The first pumping light source 21 is connected to the first interface 621 of the second optical circulator 62 via the first adjustable optical attenuator 31 and the second erbium-doped fiber amplifier 42 .

[0031] The second interface 612 of the first optical circulator 61 is connected to the first port 71 of the 2×2 opti...

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Abstract

The invention relates to a slow light caching shaper for an adjustable loop consisting of N paths of optical signals, which is suitable for storing, controlling and processing high-speed optical signals. A first interface of a first optical circulator (61) is connected with an optical signal (1) via a first erbium doped fiber amplifier (41); N bifurcated ports of an N*1 optical coupler (5) are successively connected with first to Nth pumping light sources (21, 22...2N) through first to Nth adjustable optical attenuators (31, 32...3N), and an in-line port of the N*1 optical coupler (5) is connected with a first interface of a second optical circulator (62) via a second erbium doped fiber amplifier (42); second interfaces of the first and second optical circulators (61, 62) are respectively connected with first and second ports of the a 2*2 optical switch (7), and third interfaces of the first and second optical circulators (61, 62) are respectively connected with an optical isolator (9) and an optical filter (10); and third and fourth ports of the 2*2 optical switch (7) are connected via a single-mode fiber (8).

Description

technical field [0001] The invention belongs to the technical field of optical communication, is suitable for storing, controlling and processing high-speed optical signals, and in particular relates to an adjustable loop slow optical buffer shaper for N-channel optical signals. Background technique [0002] The information network is composed of transmission and exchange. At present, the transmission part has completed the revolution from electricity to light. However, it obviously does not match the ultra-large-capacity optical transmission. The processing of information still uses electronic devices, which are limited by photoelectric conversion and electronic devices. The speed of data processing can easily cause congestion of the information network. In order to effectively improve the throughput of all-optical network nodes and avoid network competition among different users, an optical buffer device that can effectively delay or buffer optical signals is urgently need...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/25G02B6/26G02F1/365
Inventor 董小伟王志军刘文楷
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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