ISSN:
1349-9432
Keywords:
optical memories
;
optical pick-up
;
tracking-error signal detection
;
confocal optics
;
GaAs laser diode
;
GaAs photodiode
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract We previously presented the differential phase detection method using a monolithic confocal laser coupler with a confocal knife edge structure (the CKE device), which we call the CKE Pit-Edge method and which is applied to an optical disk system in which the disk has a pit depth of λ/4n. In this paper, the experimental results using this new method are reported. The experimental results agree well with the calculated results. Thus, tracking-error signals, which are very stable in the face of radial lens displacement, can be obtained for an optical disk with any pit depth using the CKE Push-Pull method and the CKE Pit-Edge method.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s10043-999-0308-9
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