Design of dual ring wavelength filters for WDM applications

Sathyadevaki, R.; Sundar, D. Shanmuga; Raja, Anita

doi:10.1016/j.optcom.2016.06.045

Cited by 24 publications

(8 citation statements)

References 14 publications

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“…This eventually entails routing of signals between different ports in the integrated circuit networks with complete connectivity and improved performance [2]. Photonic crystalbased components such as splitters [3,4], circulators [5], filters [6], decoder [7], low-power encoders [8][9][10], and routers [11][12][13] were designed and reported. Among them, routers play a vital role in transmitting signals from one user to others with low loss and high efficiency in order to deliver high-quality signals to the end-users and minimise the traffic in the data transmission.…”

Section: Introductionmentioning

confidence: 99%

Design and analysis of photonic crystal ring resonator based 6 × 6 wavelength router for photonic integrated circuits

Thirumaran

Dhanabalan

Sannasi

2021

IET Optoelectronics

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A photonic crystal ring resonator‐based 6 × 6 router has been designed and reported. The router is designed using silicon pillars with a refractive index of 3.47 perforated in the air background of refractive index 1 in a square lattice with a lattice constant of a = 562 nm. The router is designed to operate in the third optical window wavelength which has low loss and most widely used in optical communication systems and networks. Plane‐wave expansion and finite difference time domain method has been used to obtain the bandgap and performance of the designed router, which exhibits acceptable performance such as low insertion loss, low propagation delay, and low crosstalk. These routers will find applications in the photonic integrated circuit that paves a path to all‐optical networks.

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Section: Introductionmentioning

confidence: 99%

Design and analysis of photonic crystal ring resonator based 6 × 6 wavelength router for photonic integrated circuits

Thirumaran

Dhanabalan

Sannasi

2021

IET Optoelectronics

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“…The exponentially growing demand is fulfilled by optical components realized using PhCs [19]. For PIC applications, the components like splitter, coupler, multiplexer/demultiplexer, switches, modulators/demodulators, circulators, isolators, logic devices, encoders, and routers [20][21][22][23][24][25][26] were designed using PhCs and reported. Among them, the design and development of logic devices, such as gates has been increasing gradually because of their high speed signal processing, compactness and low power consumption and can also be employed to develop other logic circuits, such as half adder [27], switches [28] etc.…”

Section: Introductionmentioning

confidence: 99%

Ultra-compact all-optical logical circuits for photonic integrated circuits

Sridarshini¹,

Geerthana²,

Balaji³

et al. 2023

Laser Phys.

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In this paper, a photonic crystal based ultra-compact Optical XOR gate followed by an optical half-subtractor is proposed. Plane wave expansion is used to evaluate the photonic bandgap of the devised structure. The output and efficiency of logical circuits can be improved by maintaining distinct thresholds for the output logic states, thereby enabling the design to operate even in low power inputs. Reliability of the structure is enhanced by retaining a threshold for the output value. The performance of the proposed circuit is examined using the Finite Difference Time Domain method. The output is considered as logic 1 when the power level exceeds 0.7 μW and logic ‘0’ if it is below 0.35 μW. The proposed logical circuit has high contrast ratio. The XOR gate has a contrast ratio of about 12.55 dB, and the half subtractor has 7.78 dB and 11.76 dB for Difference and Borrow respectively. These devices work at 1550 nm wavelength and are ultra-compact in size. The proposed structure of logic gates will be suitable for photonic integrated circuits due to its ultra-small and simple design.

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“…To obtain the preferred logic functions and to confine the light inside the crystal, we can employ either line defects [27], point or surface defects [28]. Photonic crystals are the most excellent and appropriate structures used in the design and creation of all-optical devices, which includes PCF fibers [29], filters [30], multiplexers and demultiplexers [31], flip-flops [32], sensors [33], nano cavity [34], decoders [35], half-adders [36,37], couplers [38], encoders [39] and routers [40] etc.…”

Section: Introductionmentioning

confidence: 99%

2D- PhC based all optical AND, OR and EX-OR logic gates with high contrast ratio operating at C band

Geerthana¹,

SYEDAKBAR²,

Sridarshini³

et al. 2022

Laser Phys.

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In this article, photonic crystal (PhC) based all-optical logic gates, namely AND, OR and EX-OR have been explored and their characteristics are reported. Two-dimensional (2D) PhC based logic gates are proposed using a hexagonal lattice with T-shaped structure by incorporating line defects. The total size of the device is 84 µm2 and it operates at a wavelength of 1550 nm (C band). The designed optical logic gates are investigated using 2D finite difference time domain simulators by means of the plane wave expansion method. Parameters, such as response time and contrast ratio of the designed all-optic logic gates, are analyzed. The proposed AND, OR and EX-OR logic gates offer a contrast ratio of 14.48 dB, 14.57 dB and 12.9 dB respectively with, in order, response times of 0.159 ps, 0.168 ps and 0.1672 ps. The designed logic gates work in the third optical window as they are operating at the 1550 nm wavelength. To specify the performance of the proposed logic gates, their field distribution has been determined and is exhibited. The designed logic gates are suitable for use in photonic integrated circuits, all optical computing and optical sensing applications.

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Design of dual ring wavelength filters for WDM applications

Cited by 24 publications

References 14 publications

Design and analysis of photonic crystal ring resonator based 6 × 6 wavelength router for photonic integrated circuits

Design and analysis of photonic crystal ring resonator based 6 × 6 wavelength router for photonic integrated circuits

Ultra-compact all-optical logical circuits for photonic integrated circuits

2D- PhC based all optical AND, OR and EX-OR logic gates with high contrast ratio operating at C band

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