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Insensitivity of Speckle Multiplexing to Multi-longitudinal Modes of Laser in Volume Holographic Storage |
| WANG Jin-Nan;HE Shu-Rong;HE Qing-Sheng;HUANG Dong;JIN Guo-Fan |
| Department of Precision Instrument, Tsinghua University, Beijing 100084 |
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| Cite this article: |
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WANG Jin-Nan, HE Shu-Rong, HE Qing-Sheng et al 2003 Chin. Phys. Lett. 20 1047-1050 |
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Abstract If a diode pumped solid state laser is used in a holographic storage system, its multi longitudinal modes may damage the angular selectivity of the hologram and introduce more cross talk in the system. By theoretical analysis, we found that with adopting the speckle multiplexing scheme, holographic systems are no longer sensitive to the multi longitudinal modes of the laser source, and consequently the damage described above could be well suppressed. Moreover, the following high density storage experimental results also express strong advocacy of this conclusion. This result may greatly prompt the miniaturization of a holographic storage system.
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| Keywords:
42.40.Ht
42.30.Ms
42.55.Px
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Published: 01 July 2003
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| PACS: |
42.40.Ht
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(Hologram recording and readout methods)
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42.30.Ms
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(Speckle and moiré patterns)
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42.55.Px
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(Semiconductor lasers; laser diodes)
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