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.
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[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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