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[IEEE 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Munich, Germany (2019.6.23-2019.6.27)] 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Thin Disk Laser Operating in Fundamental Mode up to a Power of 4kW
摘要： Fundamental mode lasers at high power are desirable to accommodate many industrial and scientific applications especially in pulsed mode of operation. Due to its unique properties the thin disk laser (TDL) concept is an ideal platform for the generation of high optical power with excellent beam quality. Reliability, low brightness constraints for the pump source, insensitivity to back reflections, negligible nonlinearities, high scalability are a few inherent properties, and thus TDLs have been widely used in industrial applications. In the past there have been many efforts to reach the maximum output power keeping the beam quality close to the diffraction limit. Here we report on an enhanced system reaching 4 kW output power with a beam quality M2<1.2 over the full power range. The experimental setup consists of a multipass pump chamber which enables 22 passes through the active laser disk, two convex high-reflection (HR) mirrors, a spherically deformable mirror (SDM), an Yb-doped laser disk mounted on a heat sink and an outcoupling (OC) mirror. The OC is shaped such that static aspherical wavefront aberrations originating from the laser disk can be compensated. Using this approach, we demonstrate a 4 kW diffraction limited building block. Further power scaling can be achieved by using conventional combining methods such as polarization beam combining, spatial beam combining or disk multipass amplification.
关键词： high power,beam quality,thin disk laser,fundamental mode,diffraction limit
更新于2025-09-12 10:27:22
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Implications of theoretical analysis to explore the functional core dimension in one-rod core microstructured optical fibers
摘要： A new development in optical fiber technology that has attracted interest for multitude of novel and potential applications is an all-in-silica microstructured optical fibre (MOF) with one-rod core. We aim to estimate the functional core dimension for one-rod core triangular MOF (T-MOF) from its geometrical characteristics by using an alternative analytical field model. Moreover, to scrutinize the validity of the choice of effective core dimension (by adapting V-parameter, i.e., the normalized frequency) for T-MOF, we have explored the rudimentary propagation characteristics of the T-MOF in single mode guidance realm. We made comparisons with those which are based on the experimental and numerical studies. Relative errors are also reported.
关键词： One-rod core,Fundamental mode,Microstructured optical fiber,Effective index,Optimization,Single mode
更新于2025-09-11 14:15:04