Mode coupling in single-mode fiber: the advantage of using higher-order spatial-distortion-function harmonics

1986 ◽  
Vol 11 (10) ◽  
pp. 674 ◽  
Author(s):  
H. Grebel ◽  
G. J. Herskowitz
Keyword(s):  
Mode Coupling ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Higher Order ◽  
Distortion Function ◽  
Spatial Distortion

scholarly journals Influence of Even-Order Dispersion on Super-Sech Soliton Transmission Quality under Coherent Crosstalk

2008 ◽  
Vol 2008 ◽  
pp. 1-5 ◽  
Author(s):  
Aleksandra Panajotovic ◽  
Daniela Milovic ◽  
Anjan Biswas ◽  
Essaid Zerrad
Keyword(s):  
Fourth Order ◽  
Optical Network ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Higher Order ◽  
Trailing Edges ◽  
Even Order ◽  
Transmission Quality ◽  
The Impact ◽  
Order Dispersion

The transmission speed of optical network strongly depends on the impact of higher order dispersion. In presence of coherent crosstalk, which cannot be otherwise controlled by optical filtering, the impact of higher order dispersions becomes more pronounced. In this paper, the general expressions, that describe pulse deformation due to second- and fourth-order dispersions in a single-mode fiber, are given. The responses for such even-order dispersions, in presence of coherent crosstalk, are characterized by waveforms with long trailing edges. The transmission quality of optical pulses, due to both individual and combined influence of second- and fourth-order dispersions, is studied in this paper. Finally, the pulse shape and eye diagrams are obtained.

scholarly journals Multidimensional entanglement transport through single-mode fiber

2020 ◽  
Vol 6 (4) ◽  
pp. eaay0837 ◽  
Author(s):  
Jun Liu ◽  
Isaac Nape ◽  
Qainke Wang ◽  
Adam Vallés ◽  
Jian Wang ◽  
...  
Keyword(s):  
Hilbert Spaces ◽  
Mode Coupling ◽  
Degrees Of Freedom ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Entangled States ◽  
Spatial Mode ◽  
Alternative Approach ◽  
Spatial Modes ◽  
State Tomography

The global quantum network requires the distribution of entangled states over long distances, with substantial advances already demonstrated using polarization. While Hilbert spaces with higher dimensionality, e.g., spatial modes of light, allow higher information capacity per photon, such spatial mode entanglement transport requires custom multimode fiber and is limited by decoherence-induced mode coupling. Here, we circumvent this by transporting multidimensional entangled states down conventional single-mode fiber (SMF). By entangling the spin-orbit degrees of freedom of a biphoton pair, passing the polarization (spin) photon down the SMF while accessing multiple orbital angular momentum (orbital) subspaces with the other, we realize multidimensional entanglement transport. We show high-fidelity hybrid entanglement preservation down 250 m SMF across multiple 2 × 2 dimensions, confirmed by quantum state tomography, Bell violation measures, and a quantum eraser scheme. This work offers an alternative approach to spatial mode entanglement transport that facilitates deployment in legacy networks across conventional fiber.

Fused bitapered single-mode fiber directional coupler for core and cladding mode coupling

2005 ◽  
Vol 17 (12) ◽  
pp. 2631-2633 ◽  
Author(s):  
Sang Hoon Lee ◽  
Kwang Yong Song ◽  
Byoung Yoon Kim
Keyword(s):  
Mode Coupling ◽  
Directional Coupler ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Cladding Mode

Modification Model of Soliton Pulse for Higher Order

2011 ◽  
Vol 403-408 ◽  
pp. 3744-3747
Author(s):  
Muhammad Sufi ◽  
Azam Mohamad ◽  
Saktioto Saktioto ◽  
Jalil Ali
Keyword(s):  
Pulse Compression ◽  
Power Level ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Higher Order ◽  
Order Number ◽  
Low Loss ◽  
Step Method ◽  
Soliton Pulse ◽  
Different Order

In this paper the variation in soliton pulse with different order number (N) has been investigated and analyzed by Nonlinear Schrodinger Equation (NLSE). The Split-Step Method has used for numerical calculation. The change in pulse shape, the slight decrease in power level and dispersion has been observed with increase in the soliton pulse order number. Thus, the soliton pulse parameters can be optimized to acquire the desired output. By using a half-soliton period length of low-loss single-mode fiber, we have been able to demonstrate the pulse compression and pulse splitting associated with several higher-order soliton as well as to observe the fundamental soliton.

scholarly journals An All-Solid Dispersion-Compensating Photonic Crystal Fiber Based on Mode Coupling Mechanism in Dual-Concentric Core

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Zhaolun Liu ◽  
Chunlan Zhang ◽  
Yuwei Qu
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Solid Dispersion ◽  
Mode Coupling ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Confinement Loss ◽  
Coupling Mechanism ◽  
Structure Parameters ◽  
Crystal Fiber

An all-solid dispersion-compensating photonic crystal fiber based on mode coupling mechanism in dual-concentric core has been proposed. The mode coupling characteristics, dispersion, confinement loss of the fiber, and the influence on dispersion of some structure parameters are simulated by full-vector finite element method. By using the relationship between phase matching wavelengths and coupling strength with the change of fiber microstructure parameters, an all-solid dual-concentric-core dispersion-compensating photonic crystal fiber is presented. The structure parameters on dispersion characteristic are investigated. The results demonstrate that the proposed fiber has a large negative dispersion value 8465 ps/(nm·km) at 1550 nm. The effective mode area and the splicing loss to the standard single mode fiber are 12.8 μm2 and 1.89 dB at 1550 nm, respectively. At 1550 nm, the confinement loss is less than 1 × 10−3 dB/km and the bending loss with 2 cm bending diameter is less than 1 × 10−2 dB/km.

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