Optical storage system divider based draw verification with high frequency writing strategy pattern
AssigneeOracle International Corporation
InventorLingtao Wang
Life of this patent
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Abstract
An optical storage system includes an optical head configured to split a light beam into a higher power main beam and at least one lower power side beam. The optical storage system also includes a controller configured to alter an optical medium, via modulation of the higher power main beam according to a writing strategy waveform that defines at least n pulses for every n bits of data to be written to the medium, while processing a first signal resulting from the at least one lower power side beam being reflected from the medium and a second signal indicative of the writing strategy waveform to remove noise from the first signal caused by the higher power main beam to generate output indicative of the data directly after writing.
Claims20
An optical storage system comprising:
- an optical head and controller arrangement configured to modulate a higher power main beam according to a writing strategy waveform that defines at least one pulse for each bit to be written to an optical medium, to read, directly after writing, feedback from the medium containing written data and noise resulting from the higher power main beam, to remove the noise from the feedback by dividing the feedback with data indicative of the writing strategy waveform, and to generate output indicative of the written data.
A method for performing direct read after write on an optical medium, comprising:
- splitting a light beam into a higher power main beam and at least one lower power side beam;
- modulating the higher power main beam according to a writing strategy waveform that defines at least n pulses for every n bits of data to be written to the optical medium;
- while performing the modulating, processing a first signal resulting from at least one of the lower power side beams being reflected from the medium and a second signal resulting from scatter of the higher power main beam to remove noise from the first signal caused by the higher power main beam;
- and
- generating output resulting from the processing indicative of the data.
An optical storage system comprising:
- an optical head configured to split a light beam into a higher power main beam and at least one lower power side beam;
- and
- a controller configured to alter an optical medium, via modulation of the higher power main beam according to a writing strategy waveform that defines at least n pulses for every n bits of data to be written to the medium, while processing a first signal resulting from the at least one lower power side beam being reflected from the medium and a second signal indicative of the writing strategy waveform to remove noise from the first signal caused by the higher power main beam to generate output indicative of the data directly after writing.
Dependencies are inferred from the claim text.