Novel porous fiber based on dual-asymmetry for low-loss polarization maintaining THz wave guidance

Islam, Raonaqul; Habib, Selim; Hasanuzzaman, G. K. M.; Rana, Sohel; Sadath, Anwar

doi:10.1364/ol.41.000440

Cited by 60 publications

(22 citation statements)

References 23 publications

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“…Within the frequency range 0.5-0.9 THz the proposed fiber shows ultralow EML between 0.0103-0.0145cm -1 , which is only between 4.9% and 7.3% of the bulk material loss of the background material. The EML results of this fiber are clearly lower than previously reported values for other designs [14][15][16][17][18][19][20][21][22][23][24][25][26][27]. Investigation of the EML of the terahertz radiation in Fig.…”

Section: I I N U M E R Ic a L R E S U L T S A N D Discussionmentioning

confidence: 59%

“…Based on the same TOPAS material a rotated porous core hexagonal fiber was implemented that resulted in an EML of 0.066 cm -1 S. Rana [16]. Later, a highly birefringent porous-core PCF was designed by exploiting dual asymmetry of the structure [17]; the fiber design reduced fabrication difficulties by utilizing circular airholes [18]. The latest development shows that dual-hole units can be introduced into the fiber core for attaining low loss and high birefringence [19].…”

Section: Introductionmentioning

confidence: 99%

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Low Loss and Low Dispersion Fiber for Transmission Applications in the Terahertz Regime

Rana

Rakin

Subbaraman

et al. 2017

IEEE Photon. Technol. Lett.

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Section: I I N U M E R Ic a L R E S U L T S A N D Discussionmentioning

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Low Loss and Low Dispersion Fiber for Transmission Applications in the Terahertz Regime

Rana

Rakin

Subbaraman

et al. 2017

IEEE Photon. Technol. Lett.

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“…The dual-hole unit-based porous-core hexagonal PCF in [17] attained a birefringence of 0.033, an EML of 0.43 dB/cm, and a CL of 10 -3 dB/m at an operating frequency of 0.85 THz. The multi-hole core PCF in [18] achieved a higher birefringence = 0.045, a low EML = 0.08 cm -1 . Nevertheless, although PCFs based on circular holes are easier to fabricate, they have not been able to achieve a birefringence as high as those based on asymmetric rectangular holes or elliptical holes.…”

Section: Introductionmentioning

confidence: 98%

“…Asymmetric sets of circular air-holes in the cladding and core regions of the PCFs developed in [16][17][18] achieved high birefringence values. [16] utilized asymmetrical circular air-holes in both the cladding and the core region of the reported PCF, resulting in a birefringence of 0.026, and a low CL of 10 -5 dB/m.…”

Section: Introductionmentioning

confidence: 99%

Circular hole ENZ photonic crystal fibers exhibit high birefringence

et al. 2018

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Abstract-A novel photonic crystal fiber (PCF) design that yields very high birefringence is proposed and analyzed. Its significantly enhanced birefringence is achieved by filling selected air holes in the cladding with an epsilon-near-zero (ENZ) material. Extensive simulation results of this asymmetric material distribution in the lower THz range demonstrate that the reported PCF has a birefringence above 0.1 and a loss below 0.01 cm -1 over a wide band of frequencies. Moreover, it exhibits near zero dispersion at 0.75 THz for both the X-and Y-polarization modes and a birefringence equal to 0.28. This THz PCF is then scaled successfully to optical frequencies. While the high birefringence is maintained, this optical PCF has a very high loss in its Y-polarization mode and, consequently, yields single-polarization single-mode (SPSM) propagation, exhibiting near zero dispersion at the optical telecom wavelength of 1.55 μm. The ideal ENZ materials used for these conceptual models are replaced with realistic ones for both the THz and optical PCF designs. With the currently available ENZ materials, the realistic PCFs still have a high birefringence, but with higher losses compared to the idealized results. Future developments of ENZ materials that achieve lower loss properties will mitigate this issue in any frequency band of high interest.

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“…The dispersion variation in this case was also high. Raonaqul et al [15] proposed a dual asymmetrical PCF with a birefringence of 0.045. However, their obtained EML as well as dispersion variation was much higher.…”

Section: Introductionmentioning

confidence: 99%

Highly birefringent elliptical core photonic crystal fiber for terahertz application

Sultana

Islam

Faisal

et al. 2018

Optics Communications

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Novel porous fiber based on dual-asymmetry for low-loss polarization maintaining THz wave guidance

Cited by 60 publications

References 23 publications

Low Loss and Low Dispersion Fiber for Transmission Applications in the Terahertz Regime

Low Loss and Low Dispersion Fiber for Transmission Applications in the Terahertz Regime

Circular hole ENZ photonic crystal fibers exhibit high birefringence

Highly birefringent elliptical core photonic crystal fiber for terahertz application

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