Optical information recording medium and information recording method and apparatus using the recording medium

摘要

An optical information recording method including: irradiating a recording medium (11) with laser light, wherein 0 signals having width nT are recorded or rewritten using continuous laser light having a power level Pe, and 1 signals having width nT are recorded or rewritten using a light pulse train having a first pulse portion fp having power Pw and width xT (T: clock time), a multi-pulse portion mp in which a number (n-n') of high level pulses each having power Pw' and width yT, and, if (n-n') > 1, a low level pulse which has power Pb and width (1-y)T are applied, and an end pulse portion ep having power Pb' and width zT, wherein n and n' are a positive integer (n>n'), and wherein each of Pw and Pw' is greater than Pe, Pe is greater than each of Pb and Pb', and at least one of x, y and z is in a range as follows: 0.35