Locked-mode fiber laser containing circulation fiber loop

A fiber laser and fiber loop technology, applied in the laser field, can solve problems such as difficulties, output pulse repetition frequency and pulse width without tuning function, and achieve the effects of improving stability, reducing device cost, and reducing system volume

Active Publication Date: 2016-11-23
南京诺派激光技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the principle and characteristics of passive mode-locked fiber lasers, the output pulse repetition frequency and pulse width of direct passive mode-locked fiber lasers generally do not have a tuning function.
Starting from the current existing technology, it is more difficult to realize the function of repetition frequency tuning more conveniently

Method used

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  • Locked-mode fiber laser containing circulation fiber loop
  • Locked-mode fiber laser containing circulation fiber loop

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A mode-locked fiber laser containing a cyclic fiber loop, including a linear cavity saturable absorber 1, a single-mode gain-doped fiber 2, a wavelength division multiplexer 3, a fiber coupler 5, and a second acousto-optic laser The switch 8 and the coated mirror 9 also include a pump source 4 , a fiber coupler 5 , an optical amplifier 6 and a first acousto-optic switch 7 .

[0039] The pumping source 4 is coupled with the pumping light input end of the wavelength division multiplexer 3 through an optical fiber to couple the laser light into the linear laser cavity. The pumping light wavelength of the pumping source 4 is 1550nm.

[0040] One end of the single-mode gain-doped fiber 2 is connected to the saturable absorber 1, and the other end is connected to the output end of the wavelength division multiplexer 3. The single-mode gain-doped fiber 2 generates signal laser gain under the pump laser.

[0041] The signal end of the wavelength division multiplexer 3 is couple...

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PUM

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Abstract

The invention discloses a mode-locked fiber laser with a circulating fiber loop, which can tune the repetition frequency and pulse width of the mode-locked pulse signal. The laser includes a pump source, which sequentially forms a linear cavity-type saturable absorber, a single-mode gain-doped fiber, a wavelength division multiplexer, a fiber coupler, a second acousto-optic switch and a reflection device, and consists of a fiber coupler, an optical A circulating optical fiber loop formed by the amplifier and the first acousto-optic switch. The ground state pulse signal of the system is formed by a saturable absorber, a single-mode gain-doped fiber, a pump source and a coated mirror, and the circulating fiber loop is added to the traveling optical path of the pulse signal through the state transformation of the acousto-optic switch. The time of state transition determines the modulation effect of pulse signal repetition frequency and pulse width. The invention has the advantages of stable mode-locking operation, convenient tuning, low cost and normal temperature operation.

Description

technical field [0001] The invention belongs to the technical field of lasers, and in particular relates to a mode-locked fiber laser with a circulating fiber loop. Background technique [0002] The mode-locked fiber laser is based on the fiber amplifier, adding a mode-locking device, a fiber coupler, and a feedback resonator. Compared with solid-state mode-locked lasers, it has the advantages of small size and simple structure; it does not require spatial alignment and repeated adjustment of the optical path; the pigtails are basically built after welding; because the mode field area in the optical fiber is small, About tens of square microns, it is easy to form a high power density, and the transmission in the optical fiber is not affected by the external environment; it is matched with optical communication devices and the price is low. [0003] There are two options for realizing the mode-locked pulse output of fiber lasers: active mode-locking technology and passive mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/098H01S3/08
Inventor 高延祥曹佳伟
Owner 南京诺派激光技术有限公司
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