Non-periodic diffractive phase element for wavelength-division (de)multiplexing

Lo, Mbaye; Dong, Bi‐Zhen; Gu, Ben‐Yuan; Meyrueis, Patrick

doi:10.1016/s0030-4018(99)00635-5

Cited by 6 publications

(6 citation statements)

References 7 publications

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“…Experimental results demonstrated an impressive coupling efficiency of 55%, while theoretical calculations projected an even higher efficiency of 80%, all at a wavelength of 1.53 µm. (b) Multilevel DOE for WDM [316] . When employed, this coupler facilitates the straightforward multiplexing of wavelengths, allowing for spectral separations between channels to be reduced to just 8 nm, all while maintaining a low crosstalk level of −18 dB.…”

Section: Applications Of Light Field Manipulationmentioning

confidence: 99%

Diffractive optical elements 75 years on: from micro-optics to metasurfaces

Zhang,

He,

Xie

et al. 2023

Photonics Insights

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Diffractive optical elements (DOEs) are intricately designed devices with the purpose of manipulating light fields by precisely modifying their wavefronts. The concept of DOEs has its origins dating back to 1948 when D. Gabor first introduced holography. Subsequently, researchers introduced binary optical elements (BOEs), including computer-generated holograms (CGHs), as a distinct category within the realm of DOEs. This was the first revolution in optical devices. The next major breakthrough in light field manipulation occurred during the early 21st century, marked by the advent of metamaterials and metasurfaces. Metasurfaces are particularly appealing due to their ultra-thin, ultra-compact properties and their capacity to exert precise control over virtually every aspect of light fields, including amplitude, phase, polarization, wavelength/frequency, angular momentum, etc. The advancement of light field manipulation with micro/nano-structures has also enabled various applications in fields such as information acquisition, transmission, storage, processing, and display. In this review, we cover the fundamental science, cuttingedge technologies, and wide-ranging applications associated with micro/nano-scale optical devices for regulating light fields. We also delve into the prevailing challenges in the pursuit of developing viable technology for real-world applications. Furthermore, we offer insights into potential future research trends and directions within the realm of light field manipulation.

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Section: Applications Of Light Field Manipulationmentioning

confidence: 99%

Diffractive optical elements 75 years on: from micro-optics to metasurfaces

Zhang,

He,

Xie

et al. 2023

Photonics Insights

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“…Note that the grating profile height in equation (16) is N times greater than the relief height of the grating intended to operate at a single wavelength l 0 . Because of this, at large N in equation (12) the profile of the color separation grating in equation (16) should also be sought-for on the assumption of the minimal residuals (11).…”

Section: Color Separation Gratingsmentioning

confidence: 99%

“…Different wavelengths are handled using the familiar color separation gratings that allow the demultiplexing of three wavelengths l 0 , l AE1 ¼ l 0 N/(N AE 1), where N is integer, into the zero, þ1st, and À1st diffraction orders [5][6][7][8]. The 'color separation DOEs' that generate different patterns for multiple wavelengths are also widely presented in the literature [9][10][11][12][13][14]. The design of color separation DOEs is commonly based on minimizing some error functional representing the difference between the reconstructed and desired light fields for the required set of wavelengths.…”

Section: Introductionmentioning

confidence: 99%

“…The design of color separation DOEs is commonly based on minimizing some error functional representing the difference between the reconstructed and desired light fields for the required set of wavelengths. Since for each wavelength the relationship between the incident and the diffracted fields includes the integral operator (Fresnel or Kirchhoff integral), the error functional usually has a complicated form [9][10][11][12][13]. Minimizing such a functional requires complicated numerical techniques and a large amount of computation [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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Design of DOEs for wavelength division and focusing

Doskolovich

Kazanskiy

Сойфер

et al. 2005

Journal of Modern Optics

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We propose a technique for calculating the color separation gratings aimed at separating plane light beams of different wavelengths into different diffraction orders. The technique is based on a special-type optimization criterion. With this criterion, the problem of calculating the piecewise-constant grating profile is reduced to sequentially solving independent problems of optimization of the step heights. We derived an analytical expression for the profile of a color separation grating that generalizes the familiar analytical solutions. The criterion introduced is used to design a diffractive optical element (DOE) that generates required light beams when it is illuminated by different wavelengths. Design of color separation gratings able to separate three and five different wavelengths and DOEs to demultiplex and focus the two-and three-wavelength beams is presented.

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“…,AL in Eq. (9). Then, the relief height d(u) at each point u of the aperture of the color separation DOE is specified from the condition of the minimum of the…”

Section: Color Separation Doementioning

confidence: 99%

<title>Design of DOEs for multiwavelength demultiplexing and spatial focusing</title>

et al. 2004

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We propose a technique for calculating the color separation gratings aimed at separating plane light beams of different wavelengths into different diffraction orders. The technique is based on minimizing the difference between prism complex transmission functions and the complex amplitudes of beams generated for different wavelengths. We derived an analytical expression for the profile of a color separation grating that generalizes the familiar gratings onto the case of a more general wavelength relation. The technique is used to design diffractive optical elements (DOEs) intended to generate desired light beams at different wavelengths. The DOE intended to operate two wavelengths is designed using a nonlinear superposition of phase functions describing required transformation of input beams for two different wavelengths.

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Non-periodic diffractive phase element for wavelength-division (de)multiplexing

Cited by 6 publications

References 7 publications

Diffractive optical elements 75 years on: from micro-optics to metasurfaces

Diffractive optical elements 75 years on: from micro-optics to metasurfaces

Design of DOEs for wavelength division and focusing

<title>Design of DOEs for multiwavelength demultiplexing and spatial focusing</title>

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