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An active q-modulated distributed feedback fiber laser

A fiber laser and distributed feedback technology, which is applied in lasers, laser components, phonon exciters, etc., can solve the problems of reducing laser energy utilization, increasing system complexity and cost, and achieving low threshold effects

Active Publication Date: 2022-07-01
LASER RES INST OF SHANDONG ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

But on the one hand, this increases the complexity and cost of the system, on the other hand, this method reduces the utilization rate of laser energy

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  • An active q-modulated distributed feedback fiber laser
  • An active q-modulated distributed feedback fiber laser

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Embodiment Construction

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0025] Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present invention.

[0026] It should be noted that like numeral...

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Abstract

The present invention is an active Q-switched distributed feedback fiber laser. The single-mode semiconductor pump laser is connected to the pump end of the wavelength division multiplexer, the fiber isolator is connected to the signal end of the wavelength division multiplexer, and the active phase shift fiber The grating is connected to the common end of the wavelength division multiplexer, and the above constitutes a distributed feedback fiber laser; the active phase-shift fiber grating is fixed on the active phase-shift fiber grating fixing device, and the pressure device periodically squeezes the active phase under the control of the driver. By shifting the phase shift point of the fiber grating, the effective phase shift amount of the fiber grating is changed, thereby changing the laser threshold and realizing the active Q-switching laser process. The beneficial effects of the present invention are that the performance advantages of the distributed feedback fiber laser are fully utilized, the device for modulating the laser cavity Q by changing the grating phase shift is simply added, the pulse emission control of the laser is realized, and the narrow line width and pulse operation are achieved. the goal of.

Description

technical field [0001] The invention relates to the technical field of fiber lasers, in particular to an active Q-switched distributed feedback fiber laser. Background technique [0002] In application technologies such as distributed optical fiber sensing and lidar, in order to obtain the measurement quantity and event location information at the same time, the light source is often required to have the performance of narrow linewidth and short pulse. At present, the commonly used technical means is to switch and chop the continuous wave operation of the narrow linewidth light source, such as generating laser pulses through the modulation of an acousto-optic modulator or an electro-optic modulator. But this increases the complexity and cost of the system on the one hand, and reduces the utilization rate of laser energy on the other hand. [0003] Pulsed fiber lasers mainly use mode-locking and Q-switching schemes, while Q-switched fiber lasers generally use active Q-switch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/11H01S3/0933H01S3/094
CPCH01S3/11H01S3/094019H01S3/0933
Inventor 宋志强祁海峰倪家升尚盈王伟涛姜鹏波郭健王昌
Owner LASER RES INST OF SHANDONG ACAD OF SCI
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