Multiple beam generation using a stratified volume holographic grating

Granger, André; Li, Song; Lessard, Roger A.

doi:10.1364/ao.32.002534

Cited by 19 publications

(6 citation statements)

References 12 publications

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“…S uch a scheme requires that the hologram possesses su cient thickness. I n contrast, DLRPGs are constructed with single pitch gratings which can be realized through the use of a simple optical recording system [3,6]. By changing the incident beam of the DLRPGs at di erent angles, we can perform wavelength division multiplexing, or a beam splitting function with variable output beam numbers and accomplish the same functions as several common beam splitters.…”

Section: Beam Splitting and Wavelength DIV Ision Multiplexingmentioning

confidence: 99%

Diffraction properties of double-layer rectangular phase gratings

Wang

Yao

Xiong

2000

Journal of Modern Optics

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Abstrac t.We theoretically present di raction properties of double-layer rectangular phase gratings (DLRPGs). Computer simulations show that these DLRPGs can realize several functions such as optical ® ltering, optical switching, optical amplitude modulating, beam splitting with variable output beam numbers and wavelength division multiplexing, and so on. As a test of the above di raction properties, we fabricate a set of DLRPGs in a double-layer lightsensitive material by the contact printing method. Based on the DLRPGs of the material, a single beam splitter with experimental results of splitting of an incident beam into 2, 3 or 5 output beams and of higher than 64% total di raction e ciency are realized when the incident angle of the readout beam is tuned during the reading process. Journal of Modern Optics ISSN 0950± 0340 print/I SSN 1362± 3044 online # 2000 T aylor & Francis Ltd

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Section: Beam Splitting and Wavelength DIV Ision Multiplexingmentioning

confidence: 99%

Diffraction properties of double-layer rectangular phase gratings

Wang

Yao

Xiong

2000

Journal of Modern Optics

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“…These di raction orders Q are considered to be the e ective fan-out beams of the beam splitter. From the above, we can de®ne a function to estimate the properties of the beam splitters as [5] …”

Section: Theorymentioning

confidence: 99%

“…Several approaches have been proposed for fabricating the beam splitters, such as Dammann gratings [1±3] and complex holograms [4]. More recently, strati®ed volume holographic gratings (SVHGs) have also been used to make the beam splitters [5,6], which exhibit high di raction e ciencies, a simple optical recording system, etc., but the grating pro®les have a sinusoidal modulation which is di cult to control and fabricate in experiments.…”

Section: Introductionmentioning

confidence: 99%

Short Communication Beam splitters based on double-layer rectangular phase gratings

Wang¹,

Guiguang²

1999

Journal of Modern Optics

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Theoretical beam splitting characteristics of double-layer rectangular phase gratings (DLRPGs) are reported. Computer simulation shows that these DLRPGs not only can be used as common beam splitters with higher than 89% di raction e ciencies and 95% energy distribution uniformities but also exhibit novel splitting properties; one DLRPG can generate a series of beam numbers with 70% di raction e ciencies by changing in real time the incident angles of a reading beam. This means that a single beam splitter can operate as several common beam splitters. IntroductionBeam splitters have wide applications in optical ®elds such as data storage, optical ®bre communication, complex optical interconnection and integrated optics. They can be used as wavelength division multiplexers, couplers, ®lters, beam combiners, etc. Several approaches have been proposed for fabricating the beam splitters, such as Dammann gratings [1±3] and complex holograms [4]. More recently, strati®ed volume holographic gratings (SVHGs) have also been used to make the beam splitters [5, 6], which exhibit high di raction e ciencies, a simple optical recording system, etc., but the grating pro®les have a sinusoidal modulation which is di cult to control and fabricate in experiments.In addition, to date, all beam splitters have a common property, namely each splitter can fan out only a ®xed beam numbers. To gain other output beam numbers, one has to use other splitters. For example, if we require two, three and four output beams respectively, then three splitters are needed (as shown in ®gure 1 (a)).Rectangular pro®le gratings are easy to design and fabricate by computer and, additionally, Pascual et al. [7] have con®rmed that the copying technique with partial coherent light, when used to fabricate optical elements, can attain an exact reproduction of the original modulation pro®le. This makes fabrication of rectangular SVGHs feasible. In this paper, we shall theoretically demonstrate that the rectangular phase SVHGs not only can act as common beam splitters (®gure 1 (a))

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“…Since not all thin-film photosensitive materials can be thin enough to yield strictly Raman-Nath diffraction behavior within each modulation layer under all possible conditions, Yakimovich [6] studied the diffraction behavior of multiply grating which modulation layers individually exhibit Bragg diffraction behavior. In addition, different materials have been used in the fabrication of SVHOEs, such as photopolymers [3], dichromated gelatin films [7], and photoresist [1,8]. Comparing with these materials used in the fabrication of SVHOEs, photorefractive crystals are the most promising holographic data storage materials for their large storage density and reversibility.…”

Section: Introductionmentioning

confidence: 99%