We developed one dimensional data pattern hologram writer using GLV device as a spatial light modulator. The following advantages were expected: easier pixel matching, simpler signal processing, low height drive and high transfer rate. 171 angular multiplex recording holograms on a 1mm thickness polymer media, corresponding to 6.22 pixels/μm2 in density were demonstrated. With a Bit Error Rate (BER) of less than 2 x 10-4, 101 multiplexing holograms were successfully stored. Then, considerable error factors were discussed and solutions were given for higher multiplex recording.
We report a novel optical head based on the combination of a solid immersion lens and fiber optics with a flying slider for a practical near-field recording system. The configurations proposed here, are capable of near-field recording using magneto-optical detection and phase-change detection. 50nm of the flying height of the optical slider was obtained at a linear velocity of 10m/s. The effective numerical aperture of the SIL itself was 1.24 and the rms value of the wavefront aberration of the SIL was 0.0367 lambda. This rms value can realize an accurate readout at a practical level. Further, the carrier to noise ratio for the mark length of 0.2 micrometers on a spin stand was about 41 dB. This result indicates that a SIL can be combined with a flying slider for near-field recording.
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