All-optical photonic-crystal encoder capable of operating at multiple wavelengths

Yang, Yi-Pin; Lin, Kuen-Cherng; Yang, I-Chen; Lee, Kun‐Yi; Lee, Wei-Yu; Tsai, Yao‐Tsung

doi:10.1016/j.ijleo.2017.05.067

Cited by 29 publications

(8 citation statements)

References 15 publications

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“…In 2015 Moniem designed a optical 4 to 2 encoder by combining a T waveguide with four resonant rings and the designed encoder has a 1225µm 2 of foot print and switching speed is 500GHZ [20]. In the year of 2017 all optical 4 to 2 encoder was designed which is capable of working at mutual wavelengths by using nonlinear materials whose dimension is 240.5 µm 2 and Logic one power is 45% and logic zero power is 5% [21]. In 2018, 4 to 2 encoder was realized by designing a buffer and OR gate [22] which is capable of generating 2 bit binary code and overall footprint is 800 µm 2 .…”

Section: Introductionmentioning

confidence: 99%

Design of ultra compact 4:2 encoder using two dimensional photonic crystals

Patil¹,

Gowre

Sonth³

et al. 2022

Opt Quant Electron

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In this paper all optical ultra compact 4:2 encoder is proposed and designed using two dimensional photonic crystals. The proposed structure has silicon rods of refractive index of 3.4 embedded in air host by creating line defects in hexagonal lattice platform. PWE method is used to determine the photonic band gaps and structure is analyzed using FDTD method. Further, the proposed 4:2 encoder is operated at 1550 nm and it provides a high contrast ratio of 9.25dB and foot print of the structure is 119.34 μm 2 . Hence it is highly advisable for photonic integrated circuits and optical signal processing.

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Section: Introductionmentioning

confidence: 99%

Design of ultra compact 4:2 encoder using two dimensional photonic crystals

Patil¹,

Gowre

Sonth³

et al. 2022

Opt Quant Electron

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show abstract

“…Mehdizadeh designed a 4-to-2 optical encoder based on photonic crystals with OR gate [28]. Yang presented All-optical photonic-crystal encoder capable of operating at multiple wavelengths based on two ring resonator that each ring act as OR gates [29]. Lee et al supposed a 4x2 all-optical encoder based on the combination of both line defect Y branch and coupler [14].…”

Section: Introductionmentioning

confidence: 99%

“…Ouahab et all proposed an all optical 4x2 encoder by employing Kerr effect in 2D square lattice of silicon rods in photonic crystals [13]. According to the study of the mentioned papers, it is concluded that using an encoder based on a photonic crystal, can be overcome the speed limitations on any signal conversion [29,30]. One way to improve the light trapping in these structures is to use ring resonators [20,31].…”

Section: Introductionmentioning

confidence: 99%

Design Plasmonic Optical 4 × 2 Encoder Based on 2D Photonic Crystal Ring Resonator

2021

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Digital encoders are one of the key devices required in optical communication and digital signal processing systems. In this paper, a new photonic crystal structure is used to design all optical 4x2 encoder constructed from GaAs rods with square lattice in the pentane bachground based on plasmonic effect. Gold rods have also been used at the interface of dielectric rods and lines defect, which create plasmonic properties into the photonic crystal structure. The designed optical device is composed of four input waveguides and two output waveguides with two ring resonators at the resonant wavelength of 1.4mm with TM polarization. The presented encoder platform has the small size of 19 mm ×33 mm, that makes it to integration into all optical communication systems. The encoder operation is simulated and analyzed with numerical Finite Difference Time Domain (FDTD) method hand Plane Wave Expansion (PWE) method. In the proposed structure, we have shown that by selecting the appropriate radius size for the resonant cavities, the desirable wavelength can be obtained. The maximum values of transmission e ciency for the rst and second outputs are 82% and 96%, respectively. Resonant cavities are also located in the crystal lattice in such a way that by activating third input, 50% and 48% of the input signal will be obtained in each output ports indicating (1,1) logic state. So the new plasmonic photonic crystal encoder could be future applicable in the eld of optical computing.

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“…Photonic crystals (PhC) are an interesting branch in photonic integrated circuits (PIC). There are different types of PhC lattices which have their own merits and applications [1][2][3][4]. Coupling an optical signal from one type of lattice to another type of lattice may be required in designing of complex PICs [5,6].…”

Section: Introductionmentioning

confidence: 99%

Maxwell’s fisheye lens as efficient power coupler between dissimilar photonic crystal waveguides

Badri

Gilarlue

2019

Optik

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The imaging properties of the Maxwell's fisheye (MFE) lens makes it a viable candidate to implement power coupling between different types of waveguides. A coupler based on the MFE lens is designed to couple a square lattice photonic crystal to a triangular lattice one. The MFE lens is implemented as ring-based multilayer and graded photonic crystal (GPC) structures. The performance of the ring-based MFE lens is better than the GPC-based one in the C-band of optical communication. The proposed ring-based MFE coupler has a footprint of 3.623.62 m m    and covers the entire C and U bands. The S and L bands are partially covered. The average insertion loss of 0.1dB and the maximum return loss of -11dB in the C-band is achieved.

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All-optical photonic-crystal encoder capable of operating at multiple wavelengths

Cited by 29 publications

References 15 publications

Design of ultra compact 4:2 encoder using two dimensional photonic crystals

Design of ultra compact 4:2 encoder using two dimensional photonic crystals

Design Plasmonic Optical 4 × 2 Encoder Based on 2D Photonic Crystal Ring Resonator

Maxwell’s fisheye lens as efficient power coupler between dissimilar photonic crystal waveguides

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