An all-fiber vortex laser based on orbital angular momentum mode resonance
An orbital angular momentum and laser technology, which is used in lasers, laser parts, phonon exciters, etc., can solve the problems of inability to support stable transmission of orbital angular momentum modes, poor stability of vortex beams, and low mode purity. The effect of practicality and reliability, low cost, high pattern purity
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[0027] Such as figure 1 As shown, an all-fiber vortex optical laser based on orbital angular momentum mode resonance in this example includes a narrow linewidth pump laser 1, an optical amplifier 2, an orbital angular momentum mode generator 3, a first polarization controller 4, and an optical fiber Circulator 5 , fiber coupler 6 , second polarization controller 7 and vortex fiber 8 .
[0028] In this embodiment, the narrow-linewidth pump laser 1 is a narrow-linewidth semiconductor laser or a narrow-linewidth fiber laser with tunable C-band power, the linewidth is lower than 1 MHz, and the pigtail is a single-mode fiber.
[0029] The optical amplifier 2 is a high-gain erbium-doped optical fiber amplifier or a 1550nm band semiconductor optical amplifier, and the pigtail is a single-mode optical fiber.
[0030] The orbital angular momentum mode generator 3 is a 2×2 mode selective coupler made by fusion tapering of single-mode fiber and vortex fiber, which can realize the funda...
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