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Holographic optical-disk memory device of optical-fiber guide polarized complexing

A technology of polarization multiplexing and optical disk storage, which is applied in beam guiding devices, information storage, recording information storage, etc., can solve the problems of increasing adjustment requirements and costs, difficult storage density, etc., and achieves improved storage density, high performance and price ratio , the effect of fast transmission speed

Inactive Publication Date: 2005-05-18
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

In addition, the use of many optical components increases the adjustment requirements and costs, and it is not easy to use various multiplexing technologies to increase storage density.

Method used

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  • Holographic optical-disk memory device of optical-fiber guide polarized complexing
  • Holographic optical-disk memory device of optical-fiber guide polarized complexing
  • Holographic optical-disk memory device of optical-fiber guide polarized complexing

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Embodiment Construction

[0017] see first figure 1 , figure 1 It is an optical fiber guided polarization multiplexed holographic optical disc storage device in Embodiment 1 of the present invention that uses an electro-optic crystal controller to modulate the vibration direction of linearly polarized light. As can be seen from the figure, the optical fiber guided polarization multiplexed holographic optical disc storage device of the present invention, its The direction along the optical path consists of: a laser 1, an electro-optic modulation crystal 2, and a 1×2 fiber beam splitter 3. The 1×2 fiber beam splitter 3 will generate a reference beam and an object beam at a certain splitting ratio. The object optical path includes Optical fiber, lens 4, spatial light modulator 5, first Fourier lens 6, optical disc 9, second Fourier lens 7 and CCD camera 8, the second Fourier lens 7 is composed of the first Fourier lens 6 A 4f system is formed, the spatial light modulator 5 is located on the front focal p...

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Abstract

The device comprises: the laser, the electrooptic modulation crystal, 1í‡2 optical fiber beam splitter, which generates the reference and object right beam. The object light path comprises the optical fiber, the lens, the spatial light modulator, the first fourier lens, the optical disk, the second fourier lens and the CCD camera. The two fourier lenses constitute the 4f system. The spatial lightmodulator is in the front focal plane of the first fourier lens. The back focal plane of the first fourier lens, the storage media of the optical disk and the front focal plane of the second fourier lens are coincidence plane. The back focal plane of the second fourier lens is located at the receiving serface of the CCD camera. The output optical fiber with the self-focusing lens in the end leadsthe reference right to the coincidence plane. The device are high in storage density, small in size, stable in performance and good in performance and low in cost.

Description

technical field [0001] The invention relates to a holographic optical disc storage system, in particular to a holographic optical disc storage device with optical fiber guided polarization multiplexing. The idea can also be used in the holographic storage system of wavelength multiplexing, which simplifies the optical path and improves the reliability. Background technique [0002] Optical disc storage technology and optical disc drives have been accepted by the market. It has high storage density, small size, and is easy to carry. It plays a great role in data archiving and music and video playback. However, the requirements for the storage capacity of optical discs continue to increase. The storage and transmission of more data, as well as the storage and distribution of higher-definition images still require more space. The current maximum capacity of DVD discs (120cm in diameter) is about 10GByte , There is still a gap with the current magnetic hard disk and semiconduct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/00G11B7/0065G11B7/127G11B7/1353
Inventor 陈仲裕刘学璋赵虹霞
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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