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The effect of write-beam wavelength on the grating formation in Eu~3+-doped alkali silicate glasses

机译：写入光束波长对掺Eu〜3 +的碱金属硅酸盐玻璃光栅形成的影响

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摘要

We demonstrate that strong, persistent refractive index gratings can be formed and erased using off-resonance ex- citation in Eu~3+-doped alkali silicate glass. The signal build-up time and the erasing results show that the grating growth and decay are faster for the smaller laser wavelengths. Fluorescence results indicate that Eu~3+ ions excited by the various off-resonance excitations occupy sites that differ from one another in local symmetry. Results from Raman scattering measurements show that the coupling between the electronic states of the excited Eu~3+ and the high-energy phonons become weaker as the laser wavelength increases.
机译：我们证明了在Eu〜3 +掺杂的碱金属硅酸盐玻璃中使用非共振激发可以形成和消除强而持久的折射率光栅。信号建立时间和擦除结果表明，对于较小的激光波长，光栅的生长和衰减更快。荧光结果表明，由各种非共振激发激发的Eu〜3 +离子占据的位置在局部对称性上彼此不同。拉曼散射测量的结果表明，随着激光波长的增加，激发的Eu〜3 +电子态与高能声子之间的耦合变弱。

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