Practical Study of Saw-tooth Wobble Addressing by Theoretical and Experimental Approaches

We have proposed a new concept of addressing in optical disks, the saw-tooth wobble (STW) groove. In this paper, the practical study of the STW by theoretical and experimental analyses is described. The address information corresponds to an even ordered-harmonic, so the write clock has no jitter factor. A 30 dB of carrier-to-noise ratio is sufficient for achieving 1E-2 of address error. Using a practical detection system, a radial tilt margin of more than ±0.6 degree is achieved.