Oh, SJ Jo, S Kim, SG 2024-01-21T17:11:49Z 2024-01-21T17:11:49Z 2021-09-03 1998-04 0021-4922 https://pubs.kist.re.kr/handle/201004/143163 Readout signal and noise power spectrum of an optical disk system were simulated and the results were compared with the measured power spectrum to analyze the major sources of noise in the system. The readout signal and power spectrum were calculated by varying the mark shape and position as well as beam off-track range. The variations of mark length, position and beam off-track range were assumed to have a Gaussian probability distribution. The power spectrum of the readout signal was calculated by executing a discrete fast Fourier transform algorithm. From the fitting of the measured signal power spectrum, the major sources of noise in our optical disk system were deduced to be the variations of mark length, position and beam off-track range. English JAPAN J APPLIED PHYSICS DENSITY An analysis of noise power spectrum due to mark variations of an optical disk system Article 10.1143/JJAP.37.2210 1 JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, v.37, no.4B, pp.2210 - 2213 JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS 37 4B 2210 2213 scie scopus 000076066000030 2-s2.0-0032049148 Physics, Applied Physics Article; Proceedings Paper DENSITY phase-change optical disk noise sources mark shape variation off-track range variations noise power spectrum CNR