Optimization of mark edge recording waveform for a phase change rewritable optical disk using a 680 nm laser diode

Autor:	Eiji Ohno, Yoshiyuki Miyabata, Takashi Ishida, Yasumasa Shibata, Shunji Ohaira, Mamoru Shoji
Rok vydání:	1994
Předmět:	Quantum optics Laser diode business.industry Computer science Eight-to-fourteen modulation Edge (geometry) Atomic and Molecular Physics and Optics law.invention Optics law Waveform Laser power scaling business Optical disc Jitter
Zdroj:	Optical Review. 1:183-187
ISSN:	1349-9432 1340-6000
Popis:	A high density mark edge recording method on a phase change rewritable disk is reported. A carrier-to-noise ratio of 55 dB for a mark length of 0.55,μm is obtained by using a 680 nm, NA 0.6 head and a phase change rewritable disk. In mark edge recording, it is necessary to record each mark in correct length. A new laser power modulation pattern is proposed. This pattern consists of a first-pulse, a multi-pulse chain and a last-pulse. Both positions of the first-ptilse and the last-pulse are movable. By adjusting these positions, a jitter, σ/Tw (Tw is window margin), is improved to 6.5% in high density EFM (Eight to Fourteen Modulation) recording of 0.4 μm/bit.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::376518b7789c7256ea168fb9ac1ad53b https://doi.org/10.1007/bf03254857 Zobrazit plný text záznamu