Design of Low Crosstalk Double Coupling Ring Assisted 6-LP Fiber

Hongfei Zang; Feng Tian; Yongjun Wang

doi:10.3788/CJL202249.0306002

Journals >Chinese Journal of Lasers >Volume 49 >Issue 3 >Page 0306002 > Article

Chinese Journal of Lasers
Vol. 49, Issue 3, 0306002 (2022)

Design of Low Crosstalk Double Coupling Ring Assisted 6-LP Fiber

Hongfei Zang¹, Feng Tian^2、*, and Yongjun Wang²

Author Affiliations

¹State Key Laboratory of Information Photonics and Optical Communications, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China

²Beijing Key Laboratory of Space-Round Interconnection and Convergence, Beijing University of Posts and Telecommunications, Beijing 100876, China

show less

DOI: 10.3788/CJL202249.0306002 Cite this Article Set citation alerts

Hongfei Zang, Feng Tian, Yongjun Wang. Design of Low Crosstalk Double Coupling Ring Assisted 6-LP Fiber[J]. Chinese Journal of Lasers, 2022, 49(3): 0306002 Copy Citation Text

show less

Fig. 1. V of 6-LP modes in step fiber versus b

Download full size

$Simulated results of 6-LP modes in step fiber. (a) Effective mode refractive index versus working wavelength; (b) effective mode field area versus working wavelength$

Fig. 2. Simulated results of 6-LP modes in step fiber. (a) Effective mode refractive index versus working wavelength; (b) effective mode field area versus working wavelength

Download full size

Fig. 3. Mode field distributions in double coupling ring assisted few-mode fiber. (a) LP₂₁ mode field distribution; (b) LP₀₂ mode field distribution; (c) LP₃₁ mode field distribution; (d) overlapping diagram of LP₀₂ mode field and auxiliary structure of double coupling ring

Download full size

$Schematic of refractive index distribution in auxiliary structure of double coupling ring$

Fig. 4. Schematic of refractive index distribution in auxiliary structure of double coupling ring

Download full size

$Influences of inner circle radius of high refractive index coupling ring on effective mode refractive index and effective mode field area of LP01$

Fig. 5. Influences of inner circle radius of high refractive index coupling ring on effective mode refractive index and effective mode field area of LP₀₁

Download full size

$Influences of low refractive index coupling ring on effective mode refractive index and effective mode field area of LP01$

Fig. 6. Influences of low refractive index coupling ring on effective mode refractive index and effective mode field area of LP₀₁

Download full size

$Influences of width of low refractive index coupling ring on effective mode refractive index and effective mode field area of LP01$

Fig. 7. Influences of width of low refractive index coupling ring on effective mode refractive index and effective mode field area of LP₀₁

Download full size

$Influences of refractive index of high refractive index coupling ring on effective mode refractive index and effective mode field area of LP01$

Fig. 8. Influences of refractive index of high refractive index coupling ring on effective mode refractive index and effective mode field area of LP₀₁

Download full size

$Influences of width of high refractive index coupling ring on effective mode refractive index and effective mode field area$

Fig. 9. Influences of width of high refractive index coupling ring on effective mode refractive index and effective mode field area

Download full size

Fig. 10. Bending loss of LP₀₁ versus working wavelength

Download full size

Fig. 11. Bending loss of LP₁₂ mode versus bending radius

Download full size

$Comparison of effective refractive indexes of LP21 and LP02 modes in ordinary step structure and double coupling ring structure$

Fig. 12. Comparison of effective refractive indexes of LP₂₁ and LP₀₂ modes in ordinary step structure and double coupling ring structure

Download full size

Parameter	a /μm	Δn₁/%	w /μm	a_clading/μm	Δn_t/%	n_cl
Value	8.3	0.82	4.15	80	-0.7	1.444

Table 1. Structural parameters of 6-LP few-mode fiber

Parameter	a /μm	Δn₁/%	R_{in_ring}/μm	w_＋/μm	Δn_＋/%	w_-/μm	Δn_-/%
Value	8.3	0.8	3.5	2	0.25	1.5	-0.2

Table 2. Structural parameters of designed double coupling ring assisted 6-LP few-mode fiber

Performance parameter	LP₀₁	LP₁₁	LP₂₁	LP₀₂	LP₃₁	LP₁₂
n_eff	1.4540	1.4522	1.4497	1.4482	1.4464	1.4446
A_eff/μm²	129	161	184	176	193	183
Differential mode delay /(ps·m^-1)	-	4.9	11.2	13.1	18.5	21.4
Dispersion /(ps·nm^-1·km^-1)	2.9	7.9	13.4	13.9	18.8	14.7
Minimum value of \|Δn_eff\|	1.5×10^-3@LP₂₁ and LP₀₂

Table 3. Performance parameters of double coupling ring assisted 6-LP few-mode fiber at 1550 nm wavelength

Hongfei Zang, Feng Tian, Yongjun Wang. Design of Low Crosstalk Double Coupling Ring Assisted 6-LP Fiber[J]. Chinese Journal of Lasers, 2022, 49(3): 0306002

Download Citation

Set citation alerts for the article

Tools

Set citation alerts for the article

Save the article for my favorites

Paper Information