Highly birefringent elliptical core photonic crystal fiber for terahertz application

Sultana, Jakeya; Islam, Md. Saiful; Faisal, Mohammad; Islam, Mohammad Rakibul; Ng, Brian W.-H.; Ebendorff-Heidepriem, Heike; Abbott, Derek

doi:10.1016/j.optcom.2017.09.020

Cited by 83 publications

(33 citation statements)

References 39 publications

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“…Also, a near-zero ultra-flattened dispersion value of −0.01 ± 0.02 ps/THz/cm for the y-polarized mode and 0.2 ± 0.05 ps/THz/cm for the x-polarized mode can be obtained in the whole interesting frequency range from 1.1 to 2.0 THz for P = 30%. Compared to the reported THz-PCF in the literature [35][36][37][38][39][40][41][42][43][44][45][46][50][51][52][53], the proposed THz-PCF presents a near-zero ultra-flat dispersion over the widest frequency range of 1.1-2.0 THz with two zerodispersion points (1.06 THz and 1.74 THz). So D core = 378 µm and porosity = 30% is selected as optimal design parameters.…”

Section: Simulation Results and Discussionmentioning

confidence: 73%

“…More recently, Islam M. S. et al proposed a high birefringence of 6.3 × 10 −2 and flattened dispersion PCF based on Zeonex [43]. K. Paul and K. Ahmed suggested a highly birefringent ultra-low material loss PCF based on TOPAS, which have a birefringence of 1.34 × 10 −2 and a low material loss of 0.053 cm −1 at a frequency of 1THz [44]. Jakeya Sultana et al reported an ultra-high birefringence of 0.086 and an ultra-flattened near zero dispersion of 0.53 ± 0.07 ps/THz/cm in a broad frequency range in 2018 [45].…”

Section: Introductionmentioning

confidence: 99%

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Rectangular Porous-Core Photonic-Crystal Fiber With Ultra-Low Flattened Dispersion and High Birefringence for Terahertz Transmission

et al. 2020

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We propose a novel porous-core photonic crystal fiber (PCF) consisting of asymmetrical rectangular air holes in the core and six-ring hexagonal lattice circular air holes in the cladding for achieving low-loss polarization terahertz transmission in a wide frequency range. By assuming TOPAS as the host material, the finite element method (FEM) is used to investigate its properties. The near-zero flattened dispersion of −0.01±0.02 ps/THz/cm is achieved over a frequency range of 1.0-2.0 THz, as well as a high birefringence of 7.1×10 −2 which can be useful for polarization-maintaining applications. Also, critical parameters such as mode field distribution, effective material loss, confinement loss, and effective mode area are discussed in detail. Further, fabrication possibilities are discussed briefly by comparing recent work on similar waveguide structures.

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Section: Simulation Results and Discussionmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Rectangular Porous-Core Photonic-Crystal Fiber With Ultra-Low Flattened Dispersion and High Birefringence for Terahertz Transmission

et al. 2020

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“…Some of the enabling technologies available for the fabrication of PCFs include capillary stack and draw [47], drilling [48], extrusion [49], and sol-gel casting [50]. However, capillary stack and draw, drilling, and sol-gel casting are only suitable for fabricating geometries with circular air holes [15]. Extrusion techniques, on the other hand, can be used to fabricate asymmetrical geometries.…”

Section: Fabrication and Practical Feasibilitymentioning

confidence: 99%

“…In 2018, Islam et al introduced nine elliptical air holes in the core to achieve a birefringence of 0.086 and EML of 0.065 cm −1 , but crucial parameters that give insights into the modal propagation characteristics, such as the power fraction, effective area, and total loss, were not reported [14]. The same group [15] proposed a rectangular cladded fiber comprising five elliptical core air holes with a birefringence of 0.063 and EML of 0.06 cm −1 . In 2019, Paul et al proposed a hexahedron-core PC-PCF with a numerical aperture (NA) of 0.52 and EML of 0.066 cm −1 .…”

Section: Introductionmentioning

confidence: 99%

Proposal for a Quad-Elliptical Photonic Crystal Fiber for Terahertz Wave Guidance and Sensing Chemical Warfare Liquids

et al. 2019

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A porous-core photonic crystal fiber based on a cyclic olefin homopolymer (Zeonex) is proposed; it shows high birefringence, high core power fraction, low losses, and near-zero flat dispersion. The fiber’s core was designed with quad-elliptical (QE) air holes with its center occupied by bulk background material. The superiority of the QE design over the commonly adopted tri- and penta-elliptical (TE and PE) core designs is demonstrated. The presence of the bulk material at the core center and the geometrical configuration cause a broad contrast in phase refractive indices, thereby producing high birefringence and low transmission losses. A high birefringence of 0.096 was obtained at 1.2 THz, corresponding to a total loss of 0.027 cm−1 and core power fraction of approximately 51%. The chromatic dispersion and effective area of the reported fiber were also characterized within a frequency range of 0.4–1.6 THz. The QE air holes were then filled with chemical warfare agents, namely, tabun and sarin liquids. Then, the relative sensitivity, confinement loss, fractional power flow, and effective material loss (EML) of the sensor were calculated. Nearly the same relative sensitivity (r = 64%) was obtained when the QE core was filled with either liquid. Although the obtained EML for tabun was 0.033 cm−1 and that for sarin was 0.028 cm−1, the confinement loss of the fiber when it was immersed in either liquid was negligible. The proposed fiber can be fabricated using existing fabrication technologies. Moreover, it can be applied and utilized as a THz radiation conveyor in a terahertz time domain spectroscopy system for remote sensing of chemical liquids in the security and defense industries.

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“…Habib M A et al [20] proposed a PCF with a rectangular porous core that can obtain an EML of 0.07 cm −1 and birefringence on the order of 10 -2 . Sultana J et al [21] proposed a PCF with elliptical pores in the core, whose birefringence can be as high as 0.063 at 1 THz. However, the chromatic dispersion of the structure mentioned in [20,21] is relatively high.…”

Section: Introductionmentioning

confidence: 99%

Highly Birefringent, Low Flattened Dispersion Photonic Crystal Fiber in the Terahertz Region

et al. 2021

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High-performance photonic crystal fiber (PCF) has an important impact on the development of the full potential of complex terahertz systems. A new kind of PCF with D-shaped air holes in core region was proposed for terahertz (THz) region. The numerical simulation results showed that the proposed PCF has a flat dispersion of 0.09 ± 0.28 ps/THz/cm at 0.8-1.2 THz. At 1 THz, an ultra-high birefringence of 0.0595, a low effective material loss (EML) of 0.0557 cm-1 , and dispersion that can be considered zero were obtained. In addition, other characteristics of the proposed PCF were strictly analyzed, such as confinement loss, bending loss, and effective mode area. The PCF is expected to be used for short distance propagation of terahertz, polarization maintaining and sensing applications of terahertz waves.

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Highly birefringent elliptical core photonic crystal fiber for terahertz application

Cited by 83 publications

References 39 publications

Rectangular Porous-Core Photonic-Crystal Fiber With Ultra-Low Flattened Dispersion and High Birefringence for Terahertz Transmission

Rectangular Porous-Core Photonic-Crystal Fiber With Ultra-Low Flattened Dispersion and High Birefringence for Terahertz Transmission

Proposal for a Quad-Elliptical Photonic Crystal Fiber for Terahertz Wave Guidance and Sensing Chemical Warfare Liquids

Highly Birefringent, Low Flattened Dispersion Photonic Crystal Fiber in the Terahertz Region

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