L waveband bipass erbium-doped optical fiber amplifier enhanced by optical fiber grating

A technology of erbium-doped optical fiber and optical fiber grating, which is applied in the field of optical communication, can solve disadvantages and other problems, and achieve the effects of cost reduction, obvious cost advantages, and low noise index

Inactive Publication Date: 2006-10-11
SHANGHAI JIAOTONG UNIV
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Problems solved by technology

This is very disadvantageous in some applications

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  • L waveband bipass erbium-doped optical fiber amplifier enhanced by optical fiber grating

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Embodiment Construction

[0011] Such as figure 1 As shown, the present invention includes: a tunable laser 1, an optical circulator 2, a fiber Bragg grating 3, a 980 / 1550nm wavelength selective coupler 4, a 980nm pump laser 5, an erbium-doped optical fiber 6, a fiber mirror 7, and a spectrum analyzer 8. The connection method is: the optical circulator 2 and the fiber mirror 7 form a double-pass structure, the output of the tunable laser 1 is connected to the a port of the optical circulator 2, and the b port of the optical circulator 2 is connected to the fiber Bragg grating 3 , the other end of the fiber Bragg grating 3 is connected to the 1550nm port of the 980 / 1550nm wavelength selective coupler 4, and the 980nm port of the 980 / 1550nm wavelength selective coupler 4 is connected to the 980nm pump laser 5; the other end of the wavelength selective coupler 4 is connected to An erbium-doped fiber 6, the other end of the erbium-doped fiber 6 is connected to a fiber reflector 7, and the output of the c p...

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Abstract

The invention includes optical circulator, reflector of optical fiber, fiber Bragg grating, 980nm / 1550nm wavelength selection coupler, erbium adulterated fiber, 980nm pump laser, tunable laser and spectrum analyzer. Parts connections are as following: output of tunable laser connected to a port of optical circulator; b port of optical circulator connected to Bragg grating, and another end of Bragg grating connected to 1550nm port of wavelength selection coupler, and 980nm port of wavelength selection coupler connected to 980nm pump laser etc. In the invention, using lower pump power and shorter erbium adulterated fiber obtains high small signal gain and low noise label. Changing reflected wavelength of Bragg grating and selecting proper reflected wavelength and reflectivity would optimize performances further.

Description

technical field [0001] The invention relates to an erbium-doped fiber amplifier, in particular to an L-band dual-pass erbium-doped fiber amplifier enhanced by a fiber grating. It belongs to the field of optical communication. Background technique [0002] With the rapid growth of Internet data transmission, it becomes more and more important to use L-band (1565nm-1610nm) in the system, and L-band erbium-doped fiber amplifier has inherent gain-flat performance. However, because the operating wavelength of the L-band erbium-doped fiber amplifier is far away from the radiation peak of erbium ions, its pump conversion efficiency is quite low. Although some technologies can effectively improve the signal gain of the L-band at present, they are not very effective in practical applications due to higher costs or poor noise figures. [0003] Find through document retrieval, S.W.Harun, P.Poopalan, and H.Ahmad et al., Department of Physics, University of Malaysia published a paper "...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/39H04B10/12H04B10/291
Inventor 詹黎义理林
Owner SHANGHAI JIAOTONG UNIV
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