Materials, Photonic Devices, and Sensors

Influence of aberrations in microholographic recording

[+] Author Affiliations
Ryuichi Katayama

Fukuoka Institute of Technology, Department of Information Electronics, Faculty of Engineering, 3-30-1 Wajiro-higashi, Higashi-ku, Fukuoka 811-0295, Japan

Opt. Eng. 54(11), 117104 (Nov 06, 2015). doi:10.1117/1.OE.54.11.117104
History: Received May 10, 2015; Accepted October 16, 2015
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Abstract.  The influence of various types of aberrations (spherical, coma, and astigmatic) of recording and readout beams on the readout signal in a microholographic recording was investigated through a numerical simulation. The simulation conditions were that the wavelength of the laser was 405 nm and the numerical aperture of the objective lenses was 0.85. The tolerance of the root-mean-square (RMS) wavefront aberrations was defined as the aberration when the normalized signal level decreased to 0.8. Among the three types of aberrations, the influence of the spherical aberration was the most significant. When both the recording and readout beams were aberrated and the signs of the aberrations were in the worst case, the tolerance of the RMS wavefront aberrations was less than half of the Maréchal’s criterion. Moreover, when the RMS wavefront aberrations of the recording and readout beams were within the above tolerance, the bit intervals of 0.13 and 0.65μm in the inplane and vertical directions, respectively, which correspond to the recording density of 91bit/μm3 (recording capacity of 16 TB for a 120-mm-diameter optical disk having a 300-μm-thick recording layer), were shown to be feasible for confocal detection with an allowable signal-to-noise ratio.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Ryuichi Katayama
"Influence of aberrations in microholographic recording", Opt. Eng. 54(11), 117104 (Nov 06, 2015). ; http://dx.doi.org/10.1117/1.OE.54.11.117104


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