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首页> 外文会议>International conference on laser physics 2010 >Photochromic effect and holographic recording in doubly doped LiNbO3 crystals
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Photochromic effect and holographic recording in doubly doped LiNbO3 crystals

机译：LiNbO3双掺杂晶体的光致变色效应和全息记录

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Photochromic effect of lithium nioabate crystal doubly doped with Fe and Cu (LN:Fe:Cu) was investigated for 532 nm wavelength illumination with the aim of nonvolatile holographic recording of 2-dimensional (2D) gratings. The investigation showed that the absorption coefficient of LN:Fe:Cu crystal was increased 1.6 times when the illumination intensity was increased from 12.5 mW/cm2 to 96.8 mW/cm2. LN:Fe:Cu crystal was further used for recording of 2D gratings by counter propagating Bessel beam holographic method using cw 532 nm laser beam with 17 mW radiation power. The holographic recording in phorochromic doubly doped LN crystals allowed the essential decrease of the erasure of the stored grating during readout by weaker probe beam at the recording wavelength. The observation showed that during illumination by weak 2mW probe beam the power of diffracted ring decreased to 12% of its original value after 5500 sec. The entire erasure of the stored grating occurred after 8000 sec illumination.
机译：以二维（2D）光栅的非易失性全息记录为目的，研究了掺有Fe和Cu（LN：Fe：Cu）的铌酸锂晶体的光致变色效应。研究表明，当照明强度从12.5 mW / cm2增加到96.8 mW / cm2时，LN：Fe：Cu晶体的吸收系数增加了1.6倍。通过使用具有17 mW辐射功率的532 nm激光束的反向传播贝塞尔光束全息方法，LN：Fe：Cu晶体进一步用于记录2D光栅。在发色双掺杂的LN晶体中进行全息记录，可以在记录波长下用较弱的探测光束在读出期间显着减少所存储光栅的擦除。观察结果表明，在5500秒后，用2mW弱探测光束照射时，衍射环的功率降低到其原始值的12％。在8000秒的照射后，会完全擦除存储的光栅。

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