Double-ring feedback gain flattening erbium-doped optical fiber amplifier

An erbium-doped fiber and feedback gain technology, which is applied in the field of erbium-doped fiber amplifiers, can solve problems such as damage to equipment and error signals, and achieve the effects of cost saving, fast response, and flat gain

Inactive Publication Date: 2016-06-08
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And when the output stability of EDFA is too low, it will have an irreversible impact on the next-level system, not only will generate error signals, but may even damage the equipment

Method used

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  • Double-ring feedback gain flattening erbium-doped optical fiber amplifier
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  • Double-ring feedback gain flattening erbium-doped optical fiber amplifier

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Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1 Overall structure of the present invention

[0023] Such as figure 1 As shown, the structure of the present invention has a signal source 1, a first optical isolator 2, a first coupler 3, a first wavelength division multiplexer 4, a first erbium-doped optical fiber 5, a second wavelength division multiplexer 6, The basic amplifying optical path that the second optical isolator 7, gain flattening filter 8, the second coupler 9, the second erbium-doped optical fiber 10, the third optical isolator 11, the first optical splitter 12 and the pumping module 22 constitute; The basic amplifying optical path and the three-port first circulator 13, the fiber optic loop mirror 14, the three-port second circulator 15, the grating 16, the fourth optical isolator 17, and the optical attenuator 18 together form a gain flat feedback loop; the basic amplifying optical path It forms a power control feedback loop with the photoelectric converter 19, the PID control circuit 20...

Embodiment 2

[0025] Embodiment 2 Basic amplifying optical path of the present invention

[0026] The basic amplifying optical path of the present invention is similar to the traditional erbium-doped fiber amplifier, and the structure is that the signal source 1 is connected with the input end of the first optical isolator 2, and the output end of the first optical isolator 2 is connected with the first coupler 3 of the first optical isolator. The two input terminals are connected, the output terminal of the first coupler 3 is connected with the 1550nm signal input terminal of the first wavelength division multiplexer 4, and the optical output terminal of the pump module 22 is connected with the 980nm pumping terminal of the first wavelength division multiplexer 4. The input end is connected, and the output end of the first wavelength division multiplexer 4 is connected with the input end of the second wavelength division multiplexer 6 through the first erbium-doped optical fiber 5, and the ...

Embodiment 3

[0029] Embodiment 3 Gain flat feedback loop of the present invention

[0030] exist figure 1 Among them, the basic amplifying optical path and the three-port first circulator 13, the fiber optic loop mirror 14, the three-port second circulator 15, the grating 16, the fourth optical isolator 17 and the optical attenuator 18 together form a gain flattening feedback loop.

[0031] The signal light amplified by the basic amplification optical path enters the ① end of the three-port first circulator 13 through the 99% output end of the first optical splitter 12, enters the fiber optic loop mirror 14 through the ② end of the three-port first circulator 13, The signal light of the fiber optic loop mirror 14 has two parts: reflected light and transmitted light: the transmitted light part enters the three-port second circulator 15 from the ① end, and the ② port of the three-port second circulator 15 is connected to the fiber grating 16, and the fiber grating 16 The reflected light ent...

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Abstract

The invention relates to a double-ring feedback gain flattening erbium-doped optical fiber amplifier and belongs to the technical field of optical fiber amplifiers. The double-ring feedback gain flattening erbium-doped optical fiber amplifier structurally comprises a basic amplification optical path, a first three-port circulator (13), an optical fiber loop mirror (14), a second three-port circulator (15), a grating (16), a fourth optoisolator (17), an optical attenuator (18), a photoelectric converter (19), a PID control circuit (20) and a voltage-controlled current source (21), wherein the basic amplification optical path is composed of a signal source (1), a first optoisolator (2), a first coupler (3), a first wavelength division multiplexer (4), a first erbium-doped optical fiber (5), a second wavelength division multiplexer (6), a second optoisolator (7), a gain flattening filter (8), a second coupler (9), a second erbium-doped optical fiber (10), a third optoisolator (11), a first optical splitter (12) and a pumping module (22). The double-ring feedback gain flattening erbium-doped optical fiber amplifier has the advantages of being flat in gain, high in responding speed, controllable in output power and the like.

Description

technical field [0001] The invention belongs to the technical field of optical fiber amplifiers, in particular to an erbium-doped optical fiber amplifier with flat gain and controllable output power based on an optical fiber loop mirror. Background technique [0002] Today, with the wind of "Internet +" blowing all over the land of China, the development trend of optical communication technology has become inevitable. Policy measures such as "Broadband China", "speed increase and fee reduction", and "one belt and one road" have opened up broad prospects for optical communications. There has been a chasing and being chased war between bandwidth requirements and fiber optic networks. The rapid development of value-added services and the surge in data traffic mean that the demand for fiber optic cables is broader and more complex, and the requirements for optical communication equipment are smarter and stricter. . As an important device in optical communication systems, the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/294H01S3/067
CPCH04B10/294H01S3/06758H04B10/2941
Inventor 高博安明田小建高福斌吴戈汝玉星单江东刘大恺梁雪马春阳李尚
Owner JILIN UNIV
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