optical fiber的多光子吸收激发上转换发光
Multiphoton absorption excited upconversion luminescence in optical fiber
摘要：
实验证明了光纤中一种新的非线性效应：由飞秒红外脉冲的多光子吸收激发的上转换发光。通过改变泵浦源的波长，我们直接估计了上转换过程中所涉及的光子的平均数。我们强调的作用，非桥接氧空穴中心和缺氧中心缺陷，并直接比较脉冲传播的数值模拟的侧面散射发光的强度。
英文摘要：
We experimentally demonstrate a novel nonlinear effect in optical fibers: upconversion luminescence generation excited by multiphoton absorption of femtosecond infrared pulses. We directly estimate the average number of photons involved in the up-conversion process, by varying the wavelength of the pump source. We highlight the role of non-bridging oxygen hole centers and oxygen deficient center defects, and directly compare the intensity of side-scattered luminescence with numerical simulations of pulse propagation.
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