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Conference Paper
Simple Integration of Quantum and Beam Tracking Channels for Free-space Quantum Key Distribution
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- Authors
- Minchul Kim, Kyongchun Lim, Byung-Seok Choi, Joong-Seon Choe, Kap-Joong Kim, Young-Ho Ko, Ju Hee Baek, Chun Ju Youn
- Issue Date
- 2020-08
- Citation
- International Conference on Quantum Cryptography (QCrypt) 2020, pp.1-2
- Language
- English
- Type
- Conference Paper
- Abstract
- Free-space quantum key distribution (QKD) has received an increasing attention for its inherent secure communication between two remote systems. Most of the free-space QKD systems require integration of various signals such as quantum and beam tracking channels with different wavelengths into the same optical path for beam tracking [1][2][3][4][5]. The beam tracking system, consisting of fast steering mirrors and position detectors, maintains optical beam path by adjusting the misalignments induced by moving terminals, vibrations and atmospheric turbulence in the free-space QKD system. Most QKD systems use dichroic mirrors for combining and separating quantum and beam tracking channels through freespace alignment [2-5]. However, integration of such channels in free-space could require a large volume space, much alignment effort for mode overlap and can be easily affected by mechanical shock.
- KSP Keywords
- Dichroic mirrors, Different wavelengths, Fast steering mirror, Mechanical Shock, Position detectors, Quantum Key Distribution, Secure Communication, Tracking System, atmospheric turbulence, beam tracking, distribution free