Abstract

We describe a Fabry–Perot-based spectral filter for free-space quantum key distribution (QKD). A multipass etalon filter was built, and its performance was studied. The whole filter setup was carefully optimized to add less than 2 dB attenuation to a signal beam but block stray light by 21 dB. Simulations show that such a filter might be sufficient to allow QKD satellite downlinks during daytime with the current technology.

© 2009 Optical Society of America

Experimental demonstration of a reconfigurable free-space receiver implementing polarization routing and filtering for daytime quantum key distribution

Alfonso Tello Castillo, Ugo Zanforlin, Gerald S. Buller, and Ross J. Donaldson
Opt. Express 31(24) 40317-40327 (2023)

Integrated Fabry–Perot filter with wideband noise suppression for satellite-based daytime quantum key distribution

Liying Han, Yang Li, Ping Xu, Xueying Tao, Wenbin Luo, Wenqi Cai, Shengkai Liao, and Chengzhi Peng
Appl. Opt. 61(3) 812-817 (2022)

Free-space quantum key distribution to a moving receiver

Jean-Philippe Bourgoin, Brendon L. Higgins, Nikolay Gigov, Catherine Holloway, Christopher J. Pugh, Sarah Kaiser, Miles Cranmer, and Thomas Jennewein
Opt. Express 23(26) 33437-33447 (2015)

Modeling daytime sky access for a satellite quantum key distribution downlink

Mark T. Gruneisen, Michael B. Flanagan, Brett A. Sickmiller, James P. Black, Kurt E. Stoltenberg, and Alexander W. Duchane
Opt. Express 23(18) 23924-23934 (2015)

Experimental free-space quantum key distribution with efficient error correction

Wei-Yue Liu, Xian-Feng Zhong, Teng Wu, Feng-Zhi Li, Biao Jin, Yu Tang, Heng-Ming Hu, Zheng-Ping Li, Liang Zhang, Wen-Qi Cai, Sheng-Kai Liao, Yuan Cao, and Cheng-Zhi Peng
Opt. Express 25(10) 10716-10723 (2017)