Pulse fiber amplifier and optical signal power amplification method
An optical fiber amplifier and pulse technology, which is applied in the field of optical signal power amplification, can solve the problems of large overall size and power consumption of the pulse amplifier, complicated circuit and control design, and high cost, and achieves simple structure, low power consumption, and reduced production. cost effect
Active Publication Date: 2022-07-15
GUANGXUN SCI & TECH WUHAN
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Problems solved by technology
[0006] Although the multi-stage structure of the conventional pulsed fiber amplifier has obvious advantages, there are also problems such as too many pumps and types, complex circuit and control design, large overall size and power consumption of the pulse amplifier, and the cost remains high.
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[0038] The essence of the technical solutions of the embodiments of the present application will be explained in detail below with reference to the accompanying drawings.
[0039] In the embodiment of this application, the preamplifier stage structure in the conventional pulsed fiber amplifier is changed from single-mode pumping and single-mode active fiber to multi-mode pumping and double-cladding active fiber. The modified pulsed fiber amplifier may not Restricted by insufficient single-mode pump power and low core-pumped active fiber pump injection power, it can greatly improve the pulse peak power output by the preamplifier stage of the pulsed fiber amplifier, while ensuring a certain output optical signal noise. Compare.
[0040] The multi-mode pump laser has the characteristics of small size and high output power. The embodiments of the present application make full use of this feature of the multi-mode pump laser, and pass a multi-mode pump laser with a large output pow...
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The embodiment of the present application discloses a pulsed fiber amplifier, comprising: an input-side photoelectric detection unit, a pre-amplifier stage amplification unit, at least one power amplifier-stage amplification unit, and an output-side photoelectric detection unit; an input-side photoelectric detection unit and a pre-amplifier stage amplification unit They are connected by double-clad erbium-ytterbium co-doped fiber; the pre-amplifier stage amplification unit and the first-stage power amplifier stage amplification unit are connected by double-clad erbium-ytterbium co-doped fiber, and the final-stage power amplifier stage amplification unit is connected to the output side The photodetection units are connected by an optical path; the multi-mode pump laser, the output end of the multi-mode pump laser is connected with the input end of the multi-mode pump beam splitter; the multi-mode pump beam splitter pumps the multi-mode pump The pump light of the laser is split into at least two paths; one path of the split pump light is output to the pre-amplifier stage amplifying unit, and the remaining pump light in the split pump light is output to each power amplifier stage amplifying unit respectively. The embodiment of the present application also discloses an optical signal power amplification method.
Description
technical field [0001] The embodiments of the present application relate to a pulsed fiber amplifier based on a multi-mode pump and a multi-mode pump beam splitter, and an optical signal power amplification method. Background technique [0002] In order to improve the output pulse peak power and ensure a certain output signal-to-noise ratio, the current conventional pulsed fiber amplifier generally adopts a two-stage or multi-stage structure, mainly including a preamplifier composed of a single-mode pump laser and a single-mode active fiber. The power amplifier stage is composed of multi-mode pump and double-clad active fiber. Sometimes, in order to amplify the pulse peak power higher, it will contain a multi-stage power amplifier stage to obtain higher pulse peak power. [0003] The pre-amplification of conventional pulsed fiber amplifiers generally uses a single-mode fiber doped with erbium ions in the core as the active fiber, so it can only be pumped by a single-mode pum...
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IPC IPC(8): H01S3/067H01S3/094H01S3/10
CPCH01S3/06758H01S3/094069H01S3/10023
Inventor 王锟陈俊卜勤练刘鹏
Owner GUANGXUN SCI & TECH WUHAN