L-band high-power fiber laser based on gain competition and same-band pumping

A technology of fiber lasers and pump lasers, which is applied to lasers, laser components, phonon exciters, etc., can solve the problems that the wavelength range and power of spontaneous emission cannot be effectively controlled, not considered, power and efficiency limitations, etc.

Pending Publication Date: 2019-01-22
SOUTH CHINA UNIV OF TECH +1
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Problems solved by technology

However, the above-mentioned patents all absorb spontaneous radiation in the gain fiber, and cannot effectively control the wavelength range and power of the spontaneous radiation; and do not consider the use of erbium-ytterbium co-doped double-clad gain fiber, so the power and efficiency are affected by the gain fiber or pump way restrictions

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  • L-band high-power fiber laser based on gain competition and same-band pumping

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Embodiment Construction

[0020] In the following, the present invention will be further described through specific implementation examples in conjunction with the accompanying drawings. It should be noted that the protection scope of the present invention is not limited to the scope expressed in the embodiments.

[0021] like figure 1 , the high-efficiency L-band high-power fiber laser based on gain competition and pumping in the same band provided by the present invention includes an L-band laser seed source 1, a first pre-amplification level fiber amplifier 2, a first optical isolator 3, and a first optical isolator 3. Second pre-amplification level fiber amplifier 4, second optical isolator 5, auxiliary pump laser 6, wavelength division multiplexer 7, power amplifier level fiber amplifier 8 and fiber collimator 9. The structural relationship of each component is: the L-band laser seed source 1, the first pre-amplification optical fiber amplifier 2, the first optical isolator 3, the second pre-ampli...

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Abstract

The invention provides an L-band high-power fiber laser based on gain competition and same-band pumping. The described laser structure includes: a L-band laser seed source, a preamplifier stage fiberamplifier, an optical isolator, a power amplifier stage fiber amplifier, a wavelength division multiplexer, an auxiliary pump laser and a fiber collimator. The invention utilizes the gain competitionrelationship between the C (S) band laser and the L band laser in the doped gain optical fiber to realize the power amplification of the C (S) band laser firstly. When the C (S)-band laser power reaches a certain value in the doped gain fiber, the energy transfer from C (S)-band to L-band laser is realized by the same-band pump. When the gain fiber length is appropriate, most of the C (S) band laser energy will be absorbed, and ultimately achieve high conversion efficiency, high power L-band fiber laser output.

Description

technical field [0001] The invention belongs to the technical field of fiber lasers, and in particular relates to a high-conversion-efficiency, L-band, high-power fiber laser based on gain competition and same-band pumping. Background technique [0002] L-band fiber lasers have important application value in wind lidar, differential absorption lidar, space optical communication, and optical parametric oscillator pumping source. On the other hand, the L-band fiber laser is often used as the pump source of the 2.0μm-band laser resonator. Through the same-band pumping method, the resonator can directly output high-power 2.0μm-band laser. [0003] In order to achieve high power output of fiber lasers, the common method is the main oscillation power amplification technology solution (MOPA), that is, through the cascade connection of multi-stage pre-amplification level fiber amplifiers and power amplifier level fiber amplifiers, the signal light output power is continuously increa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067
CPCH01S3/06716H01S3/06754H01S3/0677
Inventor 徐善辉关先朝杨昌盛杨中民赵齐来冯洲明
Owner SOUTH CHINA UNIV OF TECH
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