Modeling of phase volume diffractive gratings, part 2: reflecting sinusoidal uniform gratings, Bragg mirrors

Ciapurin, Igor V.; Drachenberg, Derrek R.; Smirnov, Vadim; Venus, George; Glebov, Leonid

doi:10.1117/1.oe.51.5.058001

Cited by 31 publications

(23 citation statements)

References 14 publications

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“…Transmission holograms have a high angular selectivity. 41,42 In reflection holograms, the grating planes are parallel to the surface of the hologram medium. For the recording of such holograms, the object and reference beams enter from opposite sides of the holographic recording medium.…”

Section: Molecular Design Of Azo-carbazole Monolithic Dyes K Kinashi mentioning

confidence: 99%

Molecular design of azo-carbazole monolithic dyes for updatable full-color holograms

et al. 2016

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For the use of updatable full-color holography in practical applications, azo-carbazole (ACzE) monolithic dyes dispersed in poly (methyl methacrylate) (PMMA) films with high diffraction efficiency, write/delete capabilities and transparency are of extreme importance. We synthesized seven types of novel ACzE monolithic dyes and examined the influence of substituents introduced in the para position of the phenyl ring and the distinct strength of the substituents (NO 2 : NACzE, CN: CACzE, CH 3 CO: AACzE, F: FACzE, CH 3 O: MACzE, OH: HACzE and NH 2 : AmACzE) on the phenyl ring of the ACzEs. Spectroscopic and holographic optical properties, including absorption coefficient α, wavelength dependence of diffraction efficiency η, response time τ, the thickness of the recorded gratings d, the Bragg angle ΔW and the Q-factor, required for the optimization of updatable full-color holograms were investigated. On the basis of the spectroscopic and holographic optical results, the appropriate writing/reading beams were determined as follows: 561/4600 nm for NACzE, 532/4560 nm for CACzE (and AACzE), 491/4530 nm for MACzE (and HACzE). According to the spectroscopic and holographic optical results, we propose here an insight designed to allow updatable full-color holography using ACzEs, and demonstrate a multi-color hologram in MACzE/PMMA.

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Section: Molecular Design Of Azo-carbazole Monolithic Dyes K Kinashi mentioning

confidence: 99%

Molecular design of azo-carbazole monolithic dyes for updatable full-color holograms

et al. 2016

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“…Note that the physical regularities of the problem of light diffraction from an acoustic beam with a walk off are close to that of the problem of light diffraction from a holographically formed slanted phase grating [11][12][13][14][15][16][17]. However, there are some important differ ences.…”

Section: Introductionmentioning

confidence: 79%

Anisotropic light diffraction in crystals with a large acoustic-energy walk-off

2014

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The influence of energy walk off in an acoustic beam on the characteristic of anisotropic Bragg diffraction of light has been investigated by the example of paratellurite crystal. The angular and frequency characteristics of acousto optic diffraction have been calculated in wide ranges of ultrasound frequencies and Bragg angles using the modified Raman-Nath equations. It is shown that the walk off of an acoustic beam may change (either widen or narrow) significantly the frequency and angular ranges. The calculation results have been experimentally checked on an acousto optic cell made of 10.5° cut paratellurite crystal.

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“…Kogelnik's paper on coupled wave theory for thick holograms has formed the basis of theory for the design of VBGs [10]. The engineering principles for the design of VBGs have been previously published [11,12]. High-power, high-efficiency SBC by VBGs has also been previously reported [13,14], as well as a method to optimize the design of VBGs for SBC for an arbitrary number of combined beams [15].…”

Section: Introductionmentioning

confidence: 96%

“…The VBGs used in that publication had a resonance wavelength of 1064 nm, thickness of 4.78 mm, and refractive index modulation of 211 ppm. The reflection spectrum of such a VBG modeled with Kogelnik's theory [12] is shown in Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

Thermal tuning of volume Bragg gratings for spectral beam combining of high-power fiber lasers

et al. 2014

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High-radiance lasers are desired for many applications in defense and manufacturing. Spectral beam combining (SBC) by volume Bragg gratings (VBGs) is a very promising method for high-radiance lasers that need to achieve 100 kW level power. Laser-induced heating of VBGs under high-power radiation presents a challenge for maintaining Bragg resonance at various power levels without mechanical realignment. A novel thermal tuning technique and apparatus is presented that enables maintaining peak efficiency operation of the SBC system at various power levels without any mechanical adjustment. The method is demonstrated by combining two high-power ytterbium fiber lasers with high efficiency from low power to full combined power of 300 W (1.5 kW effective power), while maintaining peak combining efficiency within 0.5%.

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Modeling of phase volume diffractive gratings, part 2: reflecting sinusoidal uniform gratings, Bragg mirrors

Cited by 31 publications

References 14 publications

Molecular design of azo-carbazole monolithic dyes for updatable full-color holograms

Molecular design of azo-carbazole monolithic dyes for updatable full-color holograms

Anisotropic light diffraction in crystals with a large acoustic-energy walk-off

Thermal tuning of volume Bragg gratings for spectral beam combining of high-power fiber lasers

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