29 citations · 77 across the 11 of their papers we have counts for
11 papers · 1 filter
Tailored Speckle Illumination Microscopy with Enhanced Sectioning and Image Quality
SeungYun Han, KyeoReh Lee, Young Seo Kim +6
Optical speckle patterns have been widely used for illumination in computational imaging, optical sectioning microscopy, and super-resolution imaging. However, commonly used speckl…
Modeling Light Propagation and Amplification Efficiency in Highly Multimode, Yb-doped Fiber Amplifiers
D. L. Smith, K. Wisal, B. Huang +5
Multimode fibers have been proposed for mitigating nonlinear effects in high-power fiber amplifiers, allowing for significant power scaling. Most previous studies on light propagat…
Wavefront shaping enables high-power multimode fiber amplifier with output control
Stefan Rothe, Chun-Wei CHen, Peyman Ahmadi +6
Over the past two decades there have been tremendous advances in high-power fiber lasers, which have provided a powerful tool for science, engineering and defense. A major roadbloc…
Output beam shaping of a multimode fiber amplifier
Stefan Rothe, Kabish Wisal, Chun-Wei Chen +4
Multimode fibers provide a promising platform for realizing high-power laser amplifiers with suppressed nonlinearities and instabilities. The potential degradation of optical beam…
Optimal input excitations for suppressing nonlinear instabilities in multimode fibers
Kabish Wisal, Chun-Wei Chen, Zeyu Kuang +3
Wavefront shaping has become a powerful tool for manipulating light propagation in various complex media undergoing linear scattering. Controlling nonlinear optical interactions wi…
Exploiting spacetime symmetry in dissipative nonlinear multimode amplifiers for output control
Chun-Wei Chen, Kabish Wisal, Mathias Fink +2
Time-reversal symmetry enables shaping input waves to control output waves in many linear and nonlinear systems; however energy dissipation violates such symmetry. We consider a sa…
Theory of Transverse Mode Instability in Fiber Amplifiers with Multimode Excitations
Kabish Wisal, Chun-Wei Chen, Hui Cao +1
Transverse Mode Instability (TMI) which results from dynamic nonlinear thermo-optical scattering is the primary limitation to power scaling in high-power fiber lasers and amplifier…
Mitigating stimulated Brillouin scattering in multimode fibers with focused output via wavefront shaping
Chun-Wei Chen, Linh V. Nguyen, Kabish Wisal +9
The key challenge for high-power delivery through optical fibers is overcoming nonlinear optical effects. To keep a smooth output beam, most techniques for mitigating optical nonli…
Theory of Stimulated Brillouin Scattering in Fibers for Highly Multimode Excitations
Kabish Wisal, Stephen C. Warren-Smith, Chun-Wei Chen +2
Stimulated Brillouin scattering (SBS) is an important nonlinear optical effect which can both enable and impede optical processes in guided wave systems. Highly multi-mode excitati…
Suppressing transverse mode instability through multimode excitation in a fiber amplifier
Chun-Wei Chen, Kabish Wisal, Yaniv Eliezer +2
High-power fiber laser amplifiers have enabled an increasing range of applications in industry, medicine and defense. The power scaling for narrow-band amplifiers is currently limi…
Reflectionless excitation of arbitrary photonic structures: A general theory
A. Douglas Stone, William R. Sweeney, Chia Wei Hsu +2
We outline a recently developed theory of impedance-matching, or reflectionless excitation of arbitrary finite photonic structures in any dimension. It describes the necessary and…