2019/09/29 by Mostafa Peysokhan, Peysokhan, Mostafa, Esmaeil Mobini +7
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #FOS: Physical sciences #Optical properties and cooling technologies in crystalline materials #Optics (physics.optics) #Photonic Crystal and Fiber Optics #Solid State Laser Technologies
paper · pdf · doi:10.48550/arxiv.1909.13439
openalex publication_date 2019/09/29 · openalex created_date 2022/09/28 · openalex updated_date 2026/07/28
Recent advances in power scaling of fiber lasers are hindered by the thermal\nissues, which deteriorate the beam quality. Anti-Stokes fluorescence cooling\nhas been suggested as a viable method to balance the heat generated by the\nquantum defect and background absorption. Such radiation-balanced\nconfigurations rely on the availability of cooling-grade rare-earth-doped gain\nmaterials. Herein, we perform a series of tests on a ytterbium-doped ZBLAN\noptical fiber to extract its laser cooling-related parameters and show that it\nis a viable laser cooling medium for radiation-balancing. In particular, a\ndetailed Laser Induced Modulation Spectrum (LITMoS) test is performed to\nhighlight the transition of this fiber to the cooling regime as a function of\nthe pump laser wavelength. Numerical simulations support the feasibility of a\nradiation-balanced laser, but highlight that practical radiation-balanced\ndesigns are more demanding on the fiber material properties, especially on the\nbackground absorption, than are solid-state laser cooling experiments.\n