Publications by authors named "Fangyuan Zha"

Detecting subsurface defects in optical components has always been challenging. This study utilizes laser scattering and photothermal weak absorption techniques to detect surface and subsurface nano-damage precursors of single-crystal silicon components. Based on laser scattering and photothermal weak absorption techniques, we successfully establish the relationship between damage precursors and laser damage resistance.

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In this Letter, a watt-level laser diode (LD)-pumped ∼2.3-µm (on the H→H quasi-four-level transition) laser is reported based on a 1.5 at.

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Compact diode-pumped continuous wave (CW) and passively Q switched Tm:YAG lasers operating on the H → H transition are demonstrated. Using a 3.5-at.

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We report on the cascade continuous-wave operation of a diode-pumped Tm:YVO laser on the F → H (at ∼2 μm) and H → H (at ∼2.3 μm) Tm transitions. Pumped with a fiber-coupled spatially multimode 794 nm AlGaAs laser diode, the 1.

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In this Letter, the fabrication of large-scale (50.8 mm in diameter) few-layered MoS with physical vapor deposition on sapphire is described. Open-aperture Z-scan technology with a home-made excitation source at 2275 nm was applied to explore its nonlinear saturable absorption properties.

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