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Radio frequency modulation tunable all-fiber laser based on fiber loop mirror

A technology of radio frequency modulation and ring mirror, which is applied in the laser field, can solve the problems of low output power, inconvenient adjustment of grating efficiency, narrow adjustment range, etc., and achieve continuous tuning, compact structure, and good beam quality.

Inactive Publication Date: 2015-03-25
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, in fiber lasers, the common tunable laser technology is mainly based on rotating grating, compound ring resonance, adjusting the angle of intracavity etalon, using acousto-optic filter, electrically adjustable liquid crystal etalon, fiber grating tuning, fiber ring, sampling grating And polarization control and other technologies, either use non-full fiber structure, or the grating used is inconvenient to adjust the efficiency is low, or the adjustment range is relatively narrow, or the output power is too small

Method used

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  • Radio frequency modulation tunable all-fiber laser based on fiber loop mirror
  • Radio frequency modulation tunable all-fiber laser based on fiber loop mirror
  • Radio frequency modulation tunable all-fiber laser based on fiber loop mirror

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Embodiment

[0036] Such as figure 1 As shown, following the above-mentioned technical solution of the present invention, the RF-modulated tunable all-fiber laser based on the fiber loop mirror of this embodiment includes four parts: a resonator, a gain fiber, a pump source and a tunable filter.

[0037] Resonant cavity: the total reflection mirror is a fiber optic loop mirror with a coupling ratio of 50:50, and the output mirror is a 4% non-Nier reflection of the fiber cut end face of the output pigtail 11. Both are wide-spectrum mirrors and can be adapted to any doped Stray fiber and any wavelength.

[0038] Gain fiber: double-clad doped fiber 8 selects thulium-doped double-clad fiber of 6 / 125μm, the cladding absorption rate is 1.4dB / m790nm, that is, the cladding absorption rate at 790nm is 1.4dB / m, the core value The aperture is 0.23, and the fiber length is 10m. Since the thulium-doped fiber has a wider gain spectrum, it can achieve a larger tuning range; for other doped fiber lasers...

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Abstract

The invention discloses a radio frequency modulation tunable all-fiber laser based on a fiber loop mirror. The radio frequency modulation tunable all-fiber laser based on the fiber loop mirror is characterized in that one arm of the fiber loop mirror, a dual-cladding non-doped fiber, a dual-cladding doped fiber, a signal optical channel of a wavelength division multiplexer and an output tail fiber are sequentially connected in a welding mode end-to-end. A pumping source is connected with a pumping source optical channel of the wavelength division multiplexer in a welding mode. A fiber fixing traction support comprises a left lobe and a right lobe. The dual-cladding non-doped fiber is wound in a groove outside the fiber fixing traction support and tightened. A triangular prism support is arranged on piezoelectric ceramic, and cushion blocks are arranged at the bottom of the piezoelectric ceramic. The piezoelectric ceramic is connected with a radio frequency power source. According to radio frequency modulation tunable all-fiber laser based on the fiber loop mirror, by the adoption of the tuned radio frequency mode, ultrasonic vibration is utilized to form a long period fiber grating with an adjustable period, wavelength tuning of the fiber laser is achieved, a full-fiber structure without discrete component is adopted in the fiber laser, and no inserting loss is generated, so that optical quality is good, output power is high, the structure is compact, performance is stable and reliable, and continuous tuning in a wide range can be achieved.

Description

technical field [0001] The invention belongs to the technical field of lasers, and in particular relates to a fiber laser, in particular to a radio-frequency modulation and tunable all-fiber laser based on a fiber loop mirror. Background technique [0002] Fiber lasers are developing rapidly due to their small size, high efficiency, good stability, and good beam quality. At present, in fiber lasers, the common tunable laser technology is mainly based on rotating grating, compound ring resonance, adjusting the angle of intracavity etalon, using acousto-optic filter, electrically adjustable liquid crystal etalon, fiber grating tuning, fiber ring, sampling grating And polarization control and other technologies, either use a non-full fiber structure, or use a grating that is inconvenient to adjust and has low efficiency, or the adjustment range is relatively narrow, or the output power is too small. Contents of the invention [0003] Aiming at the problems existing in the ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067H01S3/10
Inventor 冯选旗冯晓强齐新元张尧白晋涛贺庆丽
Owner NORTHWEST UNIV
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