Magnetic force induction long-period fiber Bragg grating Q-switching pulse and continuous dual-purpose fiber laser

Abstract

The invention discloses a magnetic force induction long-period fiber Bragg grating Q-switching pulse and continuous dual-purpose fiber laser. The magnetic force induction long-period fiber Bragg grating Q-switching pulse and continuous dual-purpose fiber laser comprises a pumping source, a total reflection fiber Bragg grating, a double-clad doped fiber, an output fiber Bragg grating and an output tail fiber, wherein the pumping source, the total reflection fiber Bragg grating, the double-clad doped fiber, the output fiber Bragg grating and the output tail fiber are connected end to end. The magnetic force induction long-period fiber Bragg grating Q-switching pulse and continuous dual-purpose fiber laser further comprises a magnetic force induction long-period fiber Bragg grating which comprises a periodic irony component, a coil and an iron core, wherein the coil is wound outside the iron core, the periodic irony component is arranged on the iron core, and the tail end of the double-clad doped fiber is clamped between the periodic irony component and a support. According to the magnetic force induction long-period fiber Bragg grating Q-switching pulse and continuous dual-purpose fiber laser, when the coil is powered on, the double-clad doped fiber is extruded to form the long-period fiber Bragg grating, so that loss inside the double-clad doped fiber is increased, an oscillation threshold value of the laser is increased, and stored energy in fiber cores is increased. When the coil is powered on through periodic square wave currents, the long-period fiber Bragg grating which appears periodically is formed, and accordingly laser Q-switching output with repeatability is formed. When the coil is not powered on, the laser can also be used as a continuous laser.

Description

technical field [0001] The invention belongs to the field of laser technology, in particular to a fiber laser, in particular to a magnetically induced long-period fiber grating Q-switched pulse and continuous dual-purpose fiber laser. Background technique [0002] In the current field of laser technology, fiber lasers are developing rapidly due to their small size, high efficiency, good stability, and good beam quality. Existing Q-switched fiber lasers are the same as ordinary Q-switched lasers. A Q-switched device is inserted in the laser resonator, and the Q-switched laser pulse output is realized by periodically changing the cavity loss. [0003] Currently commonly used Q-switching technologies include acousto-optic Q-switching, electro-optic Q-switching, saturable absorber Q-switching, fiber-optic Michelson interferometer Q-switching, fiber-optic Mach-Zenter interferometer Q-switching, and fiber-optic stimulated Brillouin scattering ( SBS) Q modulation, active and passi...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the introduction of certain losses in different degrees due to the insertion of Q-switching devices in the current existing Q-switching technology, the purpose of the present invention is to provide a magnetically induced long-period grating Q-switched pulse and continuous dual-purpose fiber laser. The laser is online When the ring is energized, the double-clad doped fiber is squeezed to form a long-period fiber grating, which increases the internal loss of the double-clad doped fiber, increases the laser oscillation threshold, and increases the energy storage in the fiber core.

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