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A new photonic crystal fibre with low nonlinearity, low confinement loss and improved effective mode area

1,2Benhaddad M., 1Kerrour F., 2Benabbes O. and 3Saouli A.

1MoDERNa, Department of Electronic University of Brother Mentouri   Constantine 1, Constantine, Algeria
2LPMS, Department of Physics University of Brother Mentouri Constantine 1,   Constantine, Algeria
3Department of Electronic University of Brother Mentouri Constantine 1,   Constantine, Algeria e-mail: mohamed.benhaddad@yahoo.fr 
 
 

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Abstract. Photonic crystal fibres with large mode areas are widely employed for reducing the impairments arising from various nonlinear effects. We suggest a new design of photonic crystal fibres with large effective mode area. The fibre consists of six air-hole rings with two different structures and unequal diameters, where the air holes of the third ring are filled with the substance having high refractive index. Employing a full vectorial finite-element method, we have found that our structure exhibits a large effective mode area (up to 3575 µm2 at the light wavelength of 1200 nm) and low confinement losses (about 5.70×10-3 dB/km at 1550 nm)

Keywords: photonic crystal fibres, finite-element method, effective mode area

UDC: 535.92
Ukr. J. Phys. Opt. 20 47-53
doi: 10.3116/16091833/20/2/47/2019
Received: 07.11.2018

Анотація. Для усунення недоліків звичайних волокон, пов’язаних з нелінійними ефектами, широко використовують волокна на фотонних кристалах із великою «площею моди». Ми представляємо нову конструкцію волокон на фотонних кристалах з великою ефективною «площею моди». Волокно складається з шести наповнених повітрям кілець з двома різними структурами і різними діаметрами, де повітряні отвори третього кільця заповнені речовиною, що має високий показник заломлення. На основі повного векторного методу скінченних елементів ми зясували, що така структура виявляє значну ефективну «площу моди» (до 3575 мкм2 на довжині хвилі світла 1200 нм), а також низькі втрати конфайнменту (близько 5,70×10–3 дБ/км при 1550 нм).
 
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