| 摘要 |
An optical recording method for recording mark length-modulated information on a recording medium by using a plurality of recording mark lengths. The optical recording method comprises the steps of:when a time length of one recording mark is denoted nT (T is a reference clock period equal to or less than 25 ns, and n is a natural number equal to or more than 2),(i) dividing the time length of the recording mark nT intoin that order (m is a pulse division number; Sigmai(alphai+betai)+eta1+eta2=n; alphai (1<=i<=m) is a real number >0; betai (1<=i<=m-1) is a real number>0; betam is a real number >=0; and eta1 is a real number of -2<=ETA1<=2 AND ETA2 is a real number of -2<=ETA2<=2);radiating recording light with a recording power Pwi in a time duration of alphaiT (1<=i<=m), and radiating recording light with a bias power Pbi in a time duration of betaiT (1<=i<=m), the bias power being Pbi<PWi and Pbi<PWi+1; and(ii) changing m, alphai, betai, eta1, eta2, Pwi and Pbi according to n of the time length nT of the recording mark;wherein the pulse division number m is 2 or more for the time duration of at least one recording mark and meets n/m >=1.25 for the time length of all the recording marks.
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