**Multiplexing method**

252 Holograms – Recording Materials and Applications

λ

[ ]

*LVF* = 100 nm, then the storage capacity increases linearly with

*soffMax* in Eq. (117).

λ

β

*LVF*. The calculation

*s0* = 30°, *nw* = 1, and *Lx* =

λ

λ

 ξ

+ + <sup>Δ</sup>

β

*offMax* = 0.043 nm, then the resultant storage capacity *Nbit(selDet)* is 1.3 Tbit.

*LVF*, and finally, it asymptotically approaches the theoretical limit of the

δβ

*LVF p*

[ ]

λ

<sup>16</sup> sin . tan 1 min , <sup>1</sup>

*w xyz LVF p s*

*w LVF p s*

*F*

3 3

<sup>Δ</sup> <sup>Δ</sup> <sup>=</sup> <sup>Δ</sup>

[ ]

*<sup>p</sup>* = 50 nm,

λ

ξ

*F*

λ

Therefore, in this case, the storage capacity in the selective detection method reaches 40

minimum function; that is to say, from that point on, the storage capacity further increases

*<sup>p</sup>* of a given probe light source. Thus,

0

β

β

*s0* = 30°, *nw* = 1, *Lx* = *Ly* = *Lz* = 10 mm,

λ

*LVF* = 0.06 nm is derived from the

β

tan

0 0

 λ

 λ

*LVF* in Fig. 18. The

(124)

*sMax* is limited by the spectral width Δ

*n LLL F*

*p0* = 815 nm, Δ

Finally, the storage capacity in Eq. (124) is plotted as a function of Δ

Fig. 18. Storage capacity as a function of transmission bandwidth Δ

*w* = 532 nm,

λ

*p0* = 815 nm, Δ

We have developed the theory of holographic reconstruction with polychromatic light. In particular, focusing on its application to holographic memory, the required spectral width, distortion of the reconstructed image, diffraction efficiency, intra- and inter-page crosstalk, and storage capacity were investigated. The obtained results are summarized

λ

*<sup>p</sup>* = 50 nm,

λ

In most cases,

δβ

λ

δλ

*bit selDet*

improvement starts at Δ

λ

parameters are as follows:

*Ly* = *Lz* = 10 mm.

**5. Summary** 

below.

*N*

For example, if

increasing Δ

and Δλ*LVF* = 2

if Eq. (26) is substituted into Eq. (123), we obtain

λ

λ

percent of the theoretical limit for the monochromatic case.

λ

monochromatic case. Note that the kink observed at Δ

due to the reduction of the intra-page crosstalk noise

π

*<sup>w</sup>* = 532 nm,

( ) 3

Crystal angle multiplexing used in combination with peristrophic multiplexing is the most suitable multiplexing method in polychromatic reconstruction (PCR). Other multiplexing methods are also possible in principle, but most of them require a complicated system to read a target page because the diffracted wave **e***d0* will be pointed in a different direction at each multiplexed page.
