Abstract

In multilayer optical discs, light reflected by out-of-focus layers, which we call interlayer crosstalk, causes the tracking error signal to fluctuate, making the readout signal unstable. We previously proposed a novel method to use a grating along the optical axis in the return path of a pickup to suppress the fluctuation of a differential push-pull (DPP) signal. We develop a pickup and evaluate its performance to stabilize the DPP signal experimentally. DPP signal fluctuation is suppressed to one-third (6% to 2%), and also satisfactory readout jitters (about 8%) are obtained for a triple-layer Blu-ray Disc (BD), which demonstrate the validity of this method to reduce interlayer crosstalk of multilayer optical discs.

© 2010 Optical Society of America

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References

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  1. ISOM steering committee, “ISOM optical memory roadmap report” (International Symposium on Optical Memory, 2006).
  2. I. Ichimura, K. Saito, T. Yamasaki, and K. Osato, “Proposal for a multilayer read-only-memory optical disk structure,” Appl. Opt.  45, 1794–1803 (2006).
    [CrossRef] [PubMed]
  3. K. Mishima, D. Yoshitoku, H. Itoh, S. Yamatsu, H. Inoue, T. Komaki, K. Tanaka, and T. Aoi, “150 GB, 6-Layer write once disc for Blu-ray Disc system,” Proc. SPIE  6282, 62820I (2006).
    [CrossRef]
  4. H. Habuta, M. Tomiyama, K. Takahashi, M. Tsukuda, Y. Tomekawa, S. Furumiya, and N. Yamada, “Quadruple-layer write-once disk for blue laser based on Te-O-Pd recording films,” Jpn. J. Appl. Phys.  47, 7160–7165 (2008).
    [CrossRef]
  5. A. Mitsumori, T. Higuchi, T. Yanagisawa, M. Ogasawara, S. Tanaka, and T. Iida, “Multilayer 500 Gbyte optical disk,” Jpn. J. Appl. Phys.  48, 03A055 (2009).
    [CrossRef]
  6. T. Ogata and T. Kawashima, “Novel read-out technology for multi-layer disc using polarization device,” Proc. SPIE  6282, 62820B (2006).
    [CrossRef]
  7. M. Itonaga, H. Eguchi, K. Sakurauchi, and T. Saito, “Analysis of disturbance on differential push-pull tracking with dual-layer optical disc,” Jpn. J. Appl. Phys.  47, 5828–5831 (2008).
    [CrossRef]
  8. S. Kimura, T. Ide, Y. Anzai, K. Watanabe, T. Shintani, and E. Tatsu, “Use of grating in reading multilayer discs to reduce amount of interlayer crosstalk,” Jpn. J. Appl. Phys.  48, 03A057 (2009).
    [CrossRef]

2009 (2)

A. Mitsumori, T. Higuchi, T. Yanagisawa, M. Ogasawara, S. Tanaka, and T. Iida, “Multilayer 500 Gbyte optical disk,” Jpn. J. Appl. Phys.  48, 03A055 (2009).
[CrossRef]

S. Kimura, T. Ide, Y. Anzai, K. Watanabe, T. Shintani, and E. Tatsu, “Use of grating in reading multilayer discs to reduce amount of interlayer crosstalk,” Jpn. J. Appl. Phys.  48, 03A057 (2009).
[CrossRef]

2008 (2)

H. Habuta, M. Tomiyama, K. Takahashi, M. Tsukuda, Y. Tomekawa, S. Furumiya, and N. Yamada, “Quadruple-layer write-once disk for blue laser based on Te-O-Pd recording films,” Jpn. J. Appl. Phys.  47, 7160–7165 (2008).
[CrossRef]

M. Itonaga, H. Eguchi, K. Sakurauchi, and T. Saito, “Analysis of disturbance on differential push-pull tracking with dual-layer optical disc,” Jpn. J. Appl. Phys.  47, 5828–5831 (2008).
[CrossRef]

2006 (3)

T. Ogata and T. Kawashima, “Novel read-out technology for multi-layer disc using polarization device,” Proc. SPIE  6282, 62820B (2006).
[CrossRef]

I. Ichimura, K. Saito, T. Yamasaki, and K. Osato, “Proposal for a multilayer read-only-memory optical disk structure,” Appl. Opt.  45, 1794–1803 (2006).
[CrossRef] [PubMed]

K. Mishima, D. Yoshitoku, H. Itoh, S. Yamatsu, H. Inoue, T. Komaki, K. Tanaka, and T. Aoi, “150 GB, 6-Layer write once disc for Blu-ray Disc system,” Proc. SPIE  6282, 62820I (2006).
[CrossRef]

Anzai, Y.

S. Kimura, T. Ide, Y. Anzai, K. Watanabe, T. Shintani, and E. Tatsu, “Use of grating in reading multilayer discs to reduce amount of interlayer crosstalk,” Jpn. J. Appl. Phys.  48, 03A057 (2009).
[CrossRef]

Aoi, T.

K. Mishima, D. Yoshitoku, H. Itoh, S. Yamatsu, H. Inoue, T. Komaki, K. Tanaka, and T. Aoi, “150 GB, 6-Layer write once disc for Blu-ray Disc system,” Proc. SPIE  6282, 62820I (2006).
[CrossRef]

committee, ISOM steering

ISOM steering committee, “ISOM optical memory roadmap report” (International Symposium on Optical Memory, 2006).

Eguchi, H.

M. Itonaga, H. Eguchi, K. Sakurauchi, and T. Saito, “Analysis of disturbance on differential push-pull tracking with dual-layer optical disc,” Jpn. J. Appl. Phys.  47, 5828–5831 (2008).
[CrossRef]

Furumiya, S.

H. Habuta, M. Tomiyama, K. Takahashi, M. Tsukuda, Y. Tomekawa, S. Furumiya, and N. Yamada, “Quadruple-layer write-once disk for blue laser based on Te-O-Pd recording films,” Jpn. J. Appl. Phys.  47, 7160–7165 (2008).
[CrossRef]

Habuta, H.

H. Habuta, M. Tomiyama, K. Takahashi, M. Tsukuda, Y. Tomekawa, S. Furumiya, and N. Yamada, “Quadruple-layer write-once disk for blue laser based on Te-O-Pd recording films,” Jpn. J. Appl. Phys.  47, 7160–7165 (2008).
[CrossRef]

Higuchi, T.

A. Mitsumori, T. Higuchi, T. Yanagisawa, M. Ogasawara, S. Tanaka, and T. Iida, “Multilayer 500 Gbyte optical disk,” Jpn. J. Appl. Phys.  48, 03A055 (2009).
[CrossRef]

Ichimura, I.

Ide, T.

S. Kimura, T. Ide, Y. Anzai, K. Watanabe, T. Shintani, and E. Tatsu, “Use of grating in reading multilayer discs to reduce amount of interlayer crosstalk,” Jpn. J. Appl. Phys.  48, 03A057 (2009).
[CrossRef]

Iida, T.

A. Mitsumori, T. Higuchi, T. Yanagisawa, M. Ogasawara, S. Tanaka, and T. Iida, “Multilayer 500 Gbyte optical disk,” Jpn. J. Appl. Phys.  48, 03A055 (2009).
[CrossRef]

Inoue, H.

K. Mishima, D. Yoshitoku, H. Itoh, S. Yamatsu, H. Inoue, T. Komaki, K. Tanaka, and T. Aoi, “150 GB, 6-Layer write once disc for Blu-ray Disc system,” Proc. SPIE  6282, 62820I (2006).
[CrossRef]

Itoh, H.

K. Mishima, D. Yoshitoku, H. Itoh, S. Yamatsu, H. Inoue, T. Komaki, K. Tanaka, and T. Aoi, “150 GB, 6-Layer write once disc for Blu-ray Disc system,” Proc. SPIE  6282, 62820I (2006).
[CrossRef]

Itonaga, M.

M. Itonaga, H. Eguchi, K. Sakurauchi, and T. Saito, “Analysis of disturbance on differential push-pull tracking with dual-layer optical disc,” Jpn. J. Appl. Phys.  47, 5828–5831 (2008).
[CrossRef]

Kawashima, T.

T. Ogata and T. Kawashima, “Novel read-out technology for multi-layer disc using polarization device,” Proc. SPIE  6282, 62820B (2006).
[CrossRef]

Kimura, S.

S. Kimura, T. Ide, Y. Anzai, K. Watanabe, T. Shintani, and E. Tatsu, “Use of grating in reading multilayer discs to reduce amount of interlayer crosstalk,” Jpn. J. Appl. Phys.  48, 03A057 (2009).
[CrossRef]

Komaki, T.

K. Mishima, D. Yoshitoku, H. Itoh, S. Yamatsu, H. Inoue, T. Komaki, K. Tanaka, and T. Aoi, “150 GB, 6-Layer write once disc for Blu-ray Disc system,” Proc. SPIE  6282, 62820I (2006).
[CrossRef]

Mishima, K.

K. Mishima, D. Yoshitoku, H. Itoh, S. Yamatsu, H. Inoue, T. Komaki, K. Tanaka, and T. Aoi, “150 GB, 6-Layer write once disc for Blu-ray Disc system,” Proc. SPIE  6282, 62820I (2006).
[CrossRef]

Mitsumori, A.

A. Mitsumori, T. Higuchi, T. Yanagisawa, M. Ogasawara, S. Tanaka, and T. Iida, “Multilayer 500 Gbyte optical disk,” Jpn. J. Appl. Phys.  48, 03A055 (2009).
[CrossRef]

Ogasawara, M.

A. Mitsumori, T. Higuchi, T. Yanagisawa, M. Ogasawara, S. Tanaka, and T. Iida, “Multilayer 500 Gbyte optical disk,” Jpn. J. Appl. Phys.  48, 03A055 (2009).
[CrossRef]

Ogata, T.

T. Ogata and T. Kawashima, “Novel read-out technology for multi-layer disc using polarization device,” Proc. SPIE  6282, 62820B (2006).
[CrossRef]

Osato, K.

Saito, K.

Saito, T.

M. Itonaga, H. Eguchi, K. Sakurauchi, and T. Saito, “Analysis of disturbance on differential push-pull tracking with dual-layer optical disc,” Jpn. J. Appl. Phys.  47, 5828–5831 (2008).
[CrossRef]

Sakurauchi, K.

M. Itonaga, H. Eguchi, K. Sakurauchi, and T. Saito, “Analysis of disturbance on differential push-pull tracking with dual-layer optical disc,” Jpn. J. Appl. Phys.  47, 5828–5831 (2008).
[CrossRef]

Shintani, T.

S. Kimura, T. Ide, Y. Anzai, K. Watanabe, T. Shintani, and E. Tatsu, “Use of grating in reading multilayer discs to reduce amount of interlayer crosstalk,” Jpn. J. Appl. Phys.  48, 03A057 (2009).
[CrossRef]

Takahashi, K.

H. Habuta, M. Tomiyama, K. Takahashi, M. Tsukuda, Y. Tomekawa, S. Furumiya, and N. Yamada, “Quadruple-layer write-once disk for blue laser based on Te-O-Pd recording films,” Jpn. J. Appl. Phys.  47, 7160–7165 (2008).
[CrossRef]

Tanaka, K.

K. Mishima, D. Yoshitoku, H. Itoh, S. Yamatsu, H. Inoue, T. Komaki, K. Tanaka, and T. Aoi, “150 GB, 6-Layer write once disc for Blu-ray Disc system,” Proc. SPIE  6282, 62820I (2006).
[CrossRef]

Tanaka, S.

A. Mitsumori, T. Higuchi, T. Yanagisawa, M. Ogasawara, S. Tanaka, and T. Iida, “Multilayer 500 Gbyte optical disk,” Jpn. J. Appl. Phys.  48, 03A055 (2009).
[CrossRef]

Tatsu, E.

S. Kimura, T. Ide, Y. Anzai, K. Watanabe, T. Shintani, and E. Tatsu, “Use of grating in reading multilayer discs to reduce amount of interlayer crosstalk,” Jpn. J. Appl. Phys.  48, 03A057 (2009).
[CrossRef]

Tomekawa, Y.

H. Habuta, M. Tomiyama, K. Takahashi, M. Tsukuda, Y. Tomekawa, S. Furumiya, and N. Yamada, “Quadruple-layer write-once disk for blue laser based on Te-O-Pd recording films,” Jpn. J. Appl. Phys.  47, 7160–7165 (2008).
[CrossRef]

Tomiyama, M.

H. Habuta, M. Tomiyama, K. Takahashi, M. Tsukuda, Y. Tomekawa, S. Furumiya, and N. Yamada, “Quadruple-layer write-once disk for blue laser based on Te-O-Pd recording films,” Jpn. J. Appl. Phys.  47, 7160–7165 (2008).
[CrossRef]

Tsukuda, M.

H. Habuta, M. Tomiyama, K. Takahashi, M. Tsukuda, Y. Tomekawa, S. Furumiya, and N. Yamada, “Quadruple-layer write-once disk for blue laser based on Te-O-Pd recording films,” Jpn. J. Appl. Phys.  47, 7160–7165 (2008).
[CrossRef]

Watanabe, K.

S. Kimura, T. Ide, Y. Anzai, K. Watanabe, T. Shintani, and E. Tatsu, “Use of grating in reading multilayer discs to reduce amount of interlayer crosstalk,” Jpn. J. Appl. Phys.  48, 03A057 (2009).
[CrossRef]

Yamada, N.

H. Habuta, M. Tomiyama, K. Takahashi, M. Tsukuda, Y. Tomekawa, S. Furumiya, and N. Yamada, “Quadruple-layer write-once disk for blue laser based on Te-O-Pd recording films,” Jpn. J. Appl. Phys.  47, 7160–7165 (2008).
[CrossRef]

Yamasaki, T.

Yamatsu, S.

K. Mishima, D. Yoshitoku, H. Itoh, S. Yamatsu, H. Inoue, T. Komaki, K. Tanaka, and T. Aoi, “150 GB, 6-Layer write once disc for Blu-ray Disc system,” Proc. SPIE  6282, 62820I (2006).
[CrossRef]

Yanagisawa, T.

A. Mitsumori, T. Higuchi, T. Yanagisawa, M. Ogasawara, S. Tanaka, and T. Iida, “Multilayer 500 Gbyte optical disk,” Jpn. J. Appl. Phys.  48, 03A055 (2009).
[CrossRef]

Yoshitoku, D.

K. Mishima, D. Yoshitoku, H. Itoh, S. Yamatsu, H. Inoue, T. Komaki, K. Tanaka, and T. Aoi, “150 GB, 6-Layer write once disc for Blu-ray Disc system,” Proc. SPIE  6282, 62820I (2006).
[CrossRef]

Appl. Opt. (1)

Jpn. J. Appl. Phys. (4)

H. Habuta, M. Tomiyama, K. Takahashi, M. Tsukuda, Y. Tomekawa, S. Furumiya, and N. Yamada, “Quadruple-layer write-once disk for blue laser based on Te-O-Pd recording films,” Jpn. J. Appl. Phys.  47, 7160–7165 (2008).
[CrossRef]

A. Mitsumori, T. Higuchi, T. Yanagisawa, M. Ogasawara, S. Tanaka, and T. Iida, “Multilayer 500 Gbyte optical disk,” Jpn. J. Appl. Phys.  48, 03A055 (2009).
[CrossRef]

M. Itonaga, H. Eguchi, K. Sakurauchi, and T. Saito, “Analysis of disturbance on differential push-pull tracking with dual-layer optical disc,” Jpn. J. Appl. Phys.  47, 5828–5831 (2008).
[CrossRef]

S. Kimura, T. Ide, Y. Anzai, K. Watanabe, T. Shintani, and E. Tatsu, “Use of grating in reading multilayer discs to reduce amount of interlayer crosstalk,” Jpn. J. Appl. Phys.  48, 03A057 (2009).
[CrossRef]

Proc. SPIE (2)

T. Ogata and T. Kawashima, “Novel read-out technology for multi-layer disc using polarization device,” Proc. SPIE  6282, 62820B (2006).
[CrossRef]

K. Mishima, D. Yoshitoku, H. Itoh, S. Yamatsu, H. Inoue, T. Komaki, K. Tanaka, and T. Aoi, “150 GB, 6-Layer write once disc for Blu-ray Disc system,” Proc. SPIE  6282, 62820I (2006).
[CrossRef]

Other (1)

ISOM steering committee, “ISOM optical memory roadmap report” (International Symposium on Optical Memory, 2006).

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Figures (16)

Fig. 1
Fig. 1

Path of stray lights by a multilayer optical disc.

Fig. 2
Fig. 2

Simulated light intensity distribution on a photodetector observed at Layer 0 of a single-layer BD (left), a dual-layer BD whose spacer thickness is 25 μm (center), and a 16-layer BD in Ref. [5] whose spacer layers are alternately stacked with a thickness of 10 and 14 μm (right). The DPP method and astigmatic method are used for tracking and focus error signal detection. This simulation uses blue-violet laser of 405 nm wavelength and a 0.85 NA objective lens. The light intensity is described on a logarithmic scale.

Fig. 3
Fig. 3

Schematic of optical pickup using an OLF.

Fig. 4
Fig. 4

Principle of reduction of interlayer crosstalk using an OLF.

Fig. 5
Fig. 5

Schematic of an optical pickup with an OLF for measuring the DPP signals fluctuation. The OLF was mounted on a two-axis stage.

Fig. 6
Fig. 6

Picture of the optical pickup mounted on a disc test system, a Shibasoku LM330A.

Fig. 7
Fig. 7

External view of the fabricated OLF.

Fig. 8
Fig. 8

Laser microscope image of the grating formed in the OLF.

Fig. 9
Fig. 9

Schematic of evaluated disc structure.

Fig. 10
Fig. 10

Definition of an evaluation index for DPP signal fluctuation.

Fig. 11
Fig. 11

Measured DPP signal at Layer 0 of a commercial dual-layer BD without an OLF. Upper: raw DPP signal waveform. Lower: a level histogram of local maximum, minimum, and average value of DPP signal.

Fig. 12
Fig. 12

Comparison of measured DPP signals in case (a) without and (b) with an OLF at Layer 0 of a triple-layer BD.

Fig. 13
Fig. 13

Comparison of measured DPP signal fluctuation of a triple-layer BD in case (a) without and (b) with an OLF.

Fig. 14
Fig. 14

Comparison of PP signal waveform in case (a) without and (b) with an OLF at Layer 2 of a triple-layer BD.

Fig. 15
Fig. 15

Experimental result of DPP signal fluctuation for the lateral misalignment of OLF.

Fig. 16
Fig. 16

Eye patterns of recorded signals for a triple-layer BD at (a) layer 0, (b) layer 1, and (c) layer 2 (after limit EQ). The measured jitter was (a) 6.8%, (b) 8.3%, and (c) 8.1%.

Equations (1)

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Fluctuation ( % ) = σ ( DPP aver ) DPP amp × 100.

Metrics