Point spread function of a collinear holographic storage system

Sun, Ching Cherng; Yu, Ye Wei; Hsieh, Shu Ching; Teng, Tun Chien; Tsai, Meng Fen

doi:10.1364/oe.15.018111

Cited by 24 publications

(25 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…( [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19], it shows that the PSF is related to the auto-correlation function of the reference pattern times a defocusing phase term. Accordingly, a lens array used as the reference is introduced.…”

Section: Discussionmentioning

confidence: 99%

“…The first is to calculate the point spread function (PSF) through Bragg mismatch [10,11]; the second is to apply Fresnel transform to simulate the light field in the recording disc and through Born's approach or the method called "volume hologram being an integrator of the lights emitted from elementary light sources" (VOHIL) to calculate the diffraction pattern on the CCD plane [12][13][14][15]. The procedures of the approaches are described in detaisl from Refs.…”

Section: Basic Theorem 121 Two Models For the Collinear Systemmentioning

confidence: 99%

“…(1-13) and Eq. (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14). When the disk shifts, based on VOHIL model, the optical field diffracted from specific layer at a depth (Δz) can be expressed (1-31)…”

Section: Shift Selectivity Of the Systemmentioning

confidence: 99%

See 2 more Smart Citations

Diffraction Property of Collinear Holographic Storage System

Yu¹,

Sun²

2011

Holograms - Recording Materials and Applications

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 99%

Section: Basic Theorem 121 Two Models For the Collinear Systemmentioning

confidence: 99%

See 1 more Smart Citation

Diffraction Property of Collinear Holographic Storage System

Yu¹,

Sun²

2011

Holograms - Recording Materials and Applications

View full text Add to dashboard Cite

“…In recent studies of the holographic storage system, the co-axial lens system has been one of the main issues [9][10][11][12][13]. This lens system is simple and makes it easy to perform the angular multiplexing.…”

Section: Lens Systemmentioning

confidence: 99%

Intermediate Holographic Data Storage System by Using Sequentially Superimposed Recording

Lee

2009

Journal of the Optical Society of Korea

View full text Add to dashboard Cite

We introduce a holographic data storage system for intermediating between small data sets and mass holographic data recording. It employs a holographic sequentially superimposed recording technique. We discuss a time scheduling technique for making uniform reconstruction of sequentially recorded holograms and we show experimental results. We also discuss the Bragg selectivity of sequentially recorded holograms. The maximum storage density of our system is estimated to be 224kbit/mm 2 . Our system is useful as an intermediate recording system before recording mass holographic data in a larger system.

show abstract

“…In the model, the mirror on the back surface of the holographic disk in the real system is replaced by a double-thickness disk in a modeled transmission algorithm to replace the reflection algorithm in the real system. In previous research, we showed that the PSF for the collinear system can be written 8 as…”

mentioning

confidence: 99%

Point spread function by random phase reference in collinear holographic storage

Cheng

Hsieh

et al. 2009

Opt. Eng

View full text Add to dashboard Cite

Abstract. We use a paraxial approximating solution to calculate the point spread function of the collinear holographic storage system and show that the point spread function can be dramatically enhanced by the reference pattern with random binary phase modulation or random phase modulation. 2-4 such as CDs and DVDs. In addition, uniform shift selectivity in both radial and tangential directions and a fairly large wavelength shift and tilt tolerance are observed.5 However, the point spread function ͑PSF͒ of the proposed CHS is too wide spreading and as a result the diffracted signal is blurred, so the storage capacity in one page is limited. This restriction was not removed until the radial line reference pattern was proposed 3 in 2005. One of the disadvantages of the radial line reference is that the energy is wasted due to the low transmitting ratio in area in the reference pattern. The dc peak with extremely high energy in the focal point also causes saturation of the material and decreases the quality of the hologram. Introducing defocus of the object lens is a way to blur the dc peak to avoid this overexposure effect. However, for a CHS system, the reference beam and the signal beam interfere only around the focal plane. Defocus will decrease the interference region inside the media and inevitably decrease the effective dynamic range of the medium. A different approach is to use random binary phase ͑RBP͒ mask or random phase ͑RP͒ mask to make the spatial spectrum wider and suppress the dc component in the Fourier plane.6,7 This method will not decrease the interference region inside the media and is more suitable for solving the problem of dc peak. In this paper, we calculate the PSF of the collinear holographic storage system when reference pattern are RBP modulation and RP modulation. The simulation results show that with proper arrangement both the RBP mask and the RP mask can achieve extremely sharp PSFs. Figure 1 shows a schematic diagram of the storage system for theoretical modeling. In the model, the mirror on the back surface of the holographic disk in the real system is replaced by a double-thickness disk in a modeled transmission algorithm to replace the reflection algorithm in the real system. In previous research, we showed that the PSF for the collinear system can be written 8 as PSF͑,͒ = exp͑jk4f͒ ͑f͒ 2

show abstract

Point spread function of a collinear holographic storage system

Cited by 24 publications

References 11 publications

Diffraction Property of Collinear Holographic Storage System

Diffraction Property of Collinear Holographic Storage System

Intermediate Holographic Data Storage System by Using Sequentially Superimposed Recording

Point spread function by random phase reference in collinear holographic storage

Contact Info

Product

Resources

About