本文選題：材料 + 薄膜　； 參考：《中國激光》2017年07期

【摘要】：利用二氧化釩(VO_2)的飽和吸收性質(zhì),通過消逝場吸收的方式對波導(dǎo)激光進(jìn)行調(diào)節(jié),實(shí)現(xiàn)了皮秒脈沖激光輸出;通過控制VO_2的溫度可對輸出激光的脈沖寬度、重復(fù)頻率和能量等進(jìn)行調(diào)控。在VO_2薄膜從絕緣相過渡到金屬相期間,通過測量復(fù)合光波導(dǎo)(摻雜釔鋁石榴石波導(dǎo)表面附著VO_2)的激光輸出,可直接觀察到VO_2的可飽和吸收性質(zhì)。VO_2薄膜與波導(dǎo)模式這兩者之間通過消逝場相互作用,使得VO_2對光的吸收顯著增加。受益于VO_2獨(dú)特的熱驅(qū)動光學(xué)性質(zhì),在1064nm處,波導(dǎo)激光在皮秒脈沖和連續(xù)波機(jī)制間可有效切換。由于VO_2薄膜可飽和吸收的熱滯特征,通過冷卻或加熱處理,在相同的溫度條件下,復(fù)合波導(dǎo)可產(chǎn)生連續(xù)激光和皮秒脈沖激光。這項(xiàng)研究為在芯片級平臺上實(shí)現(xiàn)熱控制有源集成光源提供了一種方法。
[Abstract]:By using the saturated absorption property of vanadium oxide VO _ 2) and adjusting the waveguide laser by evanescent field absorption, the picosecond pulse laser output can be realized, and the pulse width of the output laser can be obtained by controlling the temperature of the VO_2. Repetition rate and energy are regulated. During the transition of VO_2 films from insulating phase to metallic phase, the laser output of composite optical waveguide (VO _ 2 doped with yttrium aluminum garnet waveguide) was measured. It can be observed directly that the saturable absorption of VO_2. The interaction between VO _ 2 thin film and waveguide mode can increase the absorption of light by VO_2 through the evanescent field. Thanks to the unique thermal drive optical properties of VO_2, waveguide lasers can be switched effectively between picosecond pulses and continuous wave mechanisms at 1064nm. Due to the thermal hysteresis characteristic of saturable absorption of VO_2 thin film, continuous laser and picosecond pulse laser can be produced under the same temperature by cooling or heat treatment. This study provides a method for the realization of thermal control active integrated light source on chip-level platform.
【作者單位】： 山東大學(xué)物理學(xué)院;
【基金】：山東大學(xué)青年學(xué)者未來計(jì)劃(2015WLJH20)
【分類號】：TN248

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本文編號：1880912