Design of 4-LP Few-Mode Fiber with Low-Differential Mode Delay

Yong Dai; Feng Tian; Yongjun Wang; Yu Gu

doi:10.3788/AOS202141.2106003

Acta Optica Sinica, Volume. 41, Issue 21, 2106003(2021)

Design of 4-LP Few-Mode Fiber with Low-Differential Mode Delay

Yong Dai, Feng Tian^*, Yongjun Wang, and Yu Gu

Beijing Key Laboratory of Space-Round Interconnection and Convergence, State Key Laboratory of Information Photonics and Optical Communication, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876

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Figures & Tables(9)

$Profile of fiber with graded refractive index$

Fig. 1. Profile of fiber with graded refractive index

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Fig. 2. Structure diagram of 4－LP few mode fiber. (a) Structure of 4－LP few mode fiber with dense air hole；(b) diagram of dense air holes

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Fig. 3. Mode diagram of 4－LP few mode fiber assisted by dense air holes

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Fig. 4. Relationship between wavelength and DMD without dense air holes

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Fig. 5. Relationship between wavelength and DMD with dense air holes

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Fig. 6. Effect of radius of dense air hole on DMD

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Fig. 7. Effect of d_e on DMD

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Fig. 8. Relationship between DMD and wavelength

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Table 1. Optical fiber characteristics at λ＝1.58 μm，d_e＝2.15 μm，d_micr＝1.4 μm

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Table 1. Optical fiber characteristics at λ＝1.58 μm，d_e＝2.15 μm，d_micr＝1.4 μm

Parameter	Unit	Value
LP₀₁ mode field area	μm²	111.07
LP₁₁ mode field area	μm²	222.31
LP₂₁ mode field area	μm²	297.18
LP₀₂ mode field area	μm²	251.56
DMD of LP₀₁	ps·km^－1
DMD of LP_11a	ps·km^－1	－4.457
DMD of LP_11b	ps·km^－1	10.3
DMD of LP_21a	ps·km^－1	7.57
DMD of LP_21b	ps·km^－1	3.422
DMD of LP₀₂	ps·km^－1	－10.29
Dispersion of LP₀₁	ps·km^－1·nm	21.3
Dispersion of LP₁₁	ps·km^－1·nm	23.07
Dispersion of LP₂₁	ps·km^－1·nm	25.23
Dispersion of LP₀₂	ps·km^－1·nm	25.91
Bending loss of LP₀₂ (bending radius R_b＝30 mm)	dB/100 turns	2.2×10^－3

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Yong Dai, Feng Tian, Yongjun Wang, Yu Gu. Design of 4-LP Few-Mode Fiber with Low-Differential Mode Delay[J]. Acta Optica Sinica, 2021, 41(21): 2106003

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