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Recently, the Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, proposed the concept of phosphate all-solid-state photonic crystal optical fiber for the first time in the world and successfully
developed it.
This scheme uses low refractive index glass instead of air pores, avoids the defects caused by the existence of air pores, makes all-fiber lasers possible, and the use of soft glass also significantly improves the pump absorption rate and nonlinear threshold
of optical fibers.
Shanghai Optics Machinery Institute successfully prepared a single-mode output, polarization-maintaining phosphate all-solid-state photonic crystal fiber with a core diameter of 17 microns by using a combination of 6wt% ytterbium doped high-quality phosphate glass, and using a combination of tube rod method and stacking method, which achieved a laser output of 13.
8W in a 40cm optical fiber, and realized the polarization maintaining performance of this kind of fiber by changing the symmetry of the fiber, and the polarization degree reached 80%.
Due to the stable physical and chemical performance, low transmission loss and high softening point of quartz fiber, the current research focus of large-mode field optical fiber mainly focuses on quartz optical fiber
.
However, quartz fiber has low rare earth solubility and low nonlinear threshold, which makes its pump absorption rate very low, and the nonlinear effect is obvious at high power output, which seriously affects the further output
of fiber laser power.
At present, most of the quartz PCF composed of photonic crystal arrangement of low refractive index rods are composed of air, which not only makes the preparation and preservation of this kind of optical fiber complex, high cost, but also due to the poor thermal conductivity of air, so that the optical fiber at high power produces mode instability phenomenon, affecting the stability
of its beam quality.
At the same time, the existence of air holes makes it difficult to weld with traditional pigtail output equipment including pump sources, resulting in the inability of all-fiber lasers
.
The all-solid-state photonic crystal fiber developed by Shanghai Optics Machinery proposes a new structure of large-mode field fiber, which successfully solves the shortcomings
of multi-air optical fiber, such as difficult welding, poor heat dissipation, and difficulty in realizing all-fiber laser.
Recently, the Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, proposed the concept of phosphate all-solid-state photonic crystal optical fiber for the first time in the world and successfully
developed it.
This scheme uses low refractive index glass instead of air pores, avoids the defects caused by the existence of air pores, makes all-fiber lasers possible, and the use of soft glass also significantly improves the pump absorption rate and nonlinear threshold
of optical fibers.
Shanghai Optics Machinery Institute successfully prepared a single-mode output, polarization-maintaining phosphate all-solid-state photonic crystal fiber with a core diameter of 17 microns by using a combination of 6wt% ytterbium doped high-quality phosphate glass, and using a combination of tube rod method and stacking method, which achieved a laser output of 13.
8W in a 40cm optical fiber, and realized the polarization maintaining performance of this kind of fiber by changing the symmetry of the fiber, and the polarization degree reached 80%.
Due to the stable physical and chemical performance, low transmission loss and high softening point of quartz fiber, the current research focus of large-mode field optical fiber mainly focuses on quartz optical fiber
.
However, quartz fiber has low rare earth solubility and low nonlinear threshold, which makes its pump absorption rate very low, and the nonlinear effect is obvious at high power output, which seriously affects the further output
of fiber laser power.
At present, most of the quartz PCF composed of photonic crystal arrangement of low refractive index rods are composed of air, which not only makes the preparation and preservation of this kind of optical fiber complex, high cost, but also due to the poor thermal conductivity of air, so that the optical fiber at high power produces mode instability phenomenon, affecting the stability
of its beam quality.
At the same time, the existence of air holes makes it difficult to weld with traditional pigtail output equipment including pump sources, resulting in the inability of all-fiber lasers
.
The all-solid-state photonic crystal fiber developed by Shanghai Optics Machinery proposes a new structure of large-mode field fiber, which successfully solves the shortcomings
of multi-air optical fiber, such as difficult welding, poor heat dissipation, and difficulty in realizing all-fiber laser.
