Demonstration of Turbulence and Pointing Error Resistant for Free-Space to Single-Mode Coupling Using Photonic Lantern

2019 ◽  
Author(s):  
Shanyong Cai ◽  
Zhiguo Zhang ◽  
Yang Hu ◽  
Biao Gong ◽  
Xue Chen
Keyword(s):  
Free Space ◽  
Mode Coupling ◽  
Single Mode ◽  
Pointing Error

Experimental comparison of 3-mode and single-mode coupling over a 1.6-km free-space link

2018 ◽  
Author(s):  
Timothy M. Yarnall ◽  
David J. Geisler ◽  
Gavin Lund ◽  
Curt M. Schieler ◽  
Mark L. Stevens ◽  
...  
Keyword(s):  
Free Space ◽  
Mode Coupling ◽  
Single Mode ◽  
Experimental Comparison

Effect of adverse weather conditions and pointing error on the performance of 2-D WH/TS OCDMA over FSO link

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Bithi Mitra ◽  
Md. Jahedul Islam
Keyword(s):  
Free Space ◽  
Atmospheric Condition ◽  
Optical Power ◽  
Weather Conditions ◽  
Free Space Optical ◽  
Central Wavelength ◽  
Pointing Error ◽  
Adverse Weather ◽  
Code Division Multiple ◽  
Ber Performance

AbstractIn this paper, the performance of two-dimensional (2-D) wavelength-hopping/time-spreading (WH/TS) optical code division multiple access (OCDMA) system over free space optical (FSO) channel is analyzed in the presence of pointing error and different weather conditions. Prime code scheme is employed for both wavelength-hopping and time-spreading to address user code-matrix. The operating central wavelength of 1550 nm is considered to demonstrate the bit error rate (BER) performance of the proposed system as a function of various system parameters. The required optical power of the proposed system is determined to maintain a BER value of 10−9. The numerical evaluation interprets that the BER performance is highly dependent on transmission length, transmitted power, pointing error angle as well as the number of simultaneous user. It is also observed that the 2-D OCDMA system over free space needs minimum required optical power in case of rainy atmospheric condition, but it is maximum for foggy atmospheric condition.

Influence of Pointing Error on Bit Error Rate of Free Space Optics System at Sea

2016 ◽  
Vol 36 (9) ◽  
pp. 0901001
Author(s):  
王红星 Wang Hongxing ◽  
宋博 Song Bo ◽  
吴晓军 Wu Xiaojun ◽  
刘敏 Liu Min
Keyword(s):  
Bit Error Rate ◽  
Error Rate ◽  
Free Space ◽  
Free Space Optics ◽  
Pointing Error ◽  
Space Optics

Laser injecting method from free space beam to single-mode fiber using single lens

2014 ◽  
Vol 26 (3) ◽  
pp. 31006
Author(s):  
张世强 Zhang Shiqiang ◽  
张政 Zhang Zheng ◽  
蔡雷 Cai Lei ◽  
瞿谱波 Qu Pubo ◽  
贺敏波 He Minbo
Keyword(s):  
Free Space ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Single Lens

Nonparaxial free-space diffraction from oblique end faces of single-mode optical fibers

2004 ◽  
Vol 29 (20) ◽  
pp. 2366 ◽  
Author(s):  
Hagyong Kihm ◽  
Seung-Woo Kim
Keyword(s):  
Optical Fibers ◽  
Free Space ◽  
Single Mode

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.

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