[1] H. Kaushal, G. Kaddoum. Optical communication in space: challenges and mitigation techniques. IEEE Commun. Surv. Tutorials, 19, 57(2017).

[2] V. W. S. Chan. Free-space optical communications. J. Lightwave Technol., 24, 4750(2006).

[3] M. Reyes, Z. Sodnik, P. Lopez, A. Alonso, T. Viera, G. Oppenhauser. Preliminary results of the in-orbit test of ARTEMIS with the optical ground station. Proc. SPIE, 4635, 38(2002).

[4] T. S. Rose, S. W. Janson, S. LaLumondiere, N. Werner, D. H. Hinkley, D. W. Rowen, R. A. Fields, R. P. Welle. LEO to ground optical communications from a small satellite platform. Proc. SPIE, 9354, 93540I(2015).

[5] T. Tolker-Nielsen, G. Oppenhaeuser. In orbit test result of an operational optical intersatellite link between ARTEMIS and SPOT4, SILEX. Proc. SPIE, 4635, 1(2002).

[6] H. Zech, F. Heine, D. Trondle, S. Seel, M. Motzigemba, R. Meyer, S. Philipp-May. LCT for EDRS: LEO to GEO optical communications at 1,8 Gbps between Alphasat and Sentinel 1a. Proc. SPIE, 9647, 96470J(2015).

[7] J. Romba, Z. Sodnik, M. Reyes, A. Alonso, A. Bird. ESA’s bidirectional space-to-ground laser communication experiments. Proc. SPIE, 5550, 287(2004).

[8] A. Alonso, M. Reyes, Z. Sodnik. Performance of satellite-to-ground communications link between ARTEMIS and the optical ground station. Proc. SPIE, 5572, 372(2004).

[9] D. M. Boroson, B. S. Robinson, D. V. Murphy, D. A. Burianek, F. Khatri, J. M. Kovalik, Z. Sodnik, D. M. Cornwell. Overview and results of the lunar laser communication demonstration. Proc. SPIE, 8971, 89710S(2014).

[10] J. R. Barry, E. A. Lee. Performance of coherent optical receivers. Proc. IEEE, 78, 1369(1990).

[11] R. Lange, B. Smutny, B. Wandernoth, R. Czichy, D. Giggenbach. 142 km, 5.625 Gbps free-space optical link based on homodyne BPSK modulation. Proc. SPIE, 6105, 61050A(2006).

[12] W. B. Chen, J. F. Sun, X. Hou, R. Zhu, P. P. Hou, Y. Yang, M. Gao, L. J. Lei, K. D. Xie, M. J. Huang, R. Li, H. G. Zang, Y. Wan, E. W. Dai, Y. L. Xi, W. Lu, S. T. Wei, L. Liu, J. W. Li. 5.12 Gbps optical communication link between LEO satellite and ground station, 260(2017).

[13] O. Adamczyk, R. Noe. 5-bit 12.5 Gsamples/s analog-to-digital converter for a digital receiver in a synchronous optical QPSK transmission system, 119(2008).

[14] E. Torrengo, V. Ferrero, S. Camatel. A 20-Gb/s quadrature phase-shift-keying real-time coherent system based on a subcarrier optical phase-locked loop. IEEE Photonics Technol. Lett., 21, 1296(2009).

[15] F. Herzog, K. Kudielka, D. Erni, W. Bachtold. Optical phase locked loop for transparent inter-satellite communications. Opt. Express, 13, 3816(2005).

[16] F. C. Liu, J. F. Sun, X. P. Ma, P. P. Hou, G. Y. Cai, Z. W. Sun, Z. Y. Lu, L. R. Liu. New coherent laser communication detection scheme based on channel-switching method. Appl. Opt., 54, 2738(2015).

[17] B. Zhang, J. F. Sun, G. Y. Li, M. M. Xu, G. Zhang, C. Z. Lao, H. Y. He, C. L. Yue. Differential phase-shift keying heterodyne coherent detection with local oscillation enhancement. Opt. Eng., 57, 086105(2018).

[18] Z. Xuan, F. Aflatouni. Integrated coherent optical receiver with feed-forward carrier recovery. Opt. Express, 28, 16073(2020).

[19] S. W. Lu, Y. Zhou, F. N. Zhu, J. F. Sun, Y. Yang, R. Zhu, S. N. Hu, X. X. Zhang, X. L. Zhu, X. Hou, W. B. Chen. Digital-analog hybrid optical phase-lock loop for optical quadrature phase-shift keying. Chin. Opt. Lett., 18, 090602(2020).

[20] X. H. Huang, C. Y. Li, H. H. Lu, C. W. Su, Y. R. Wu, Z. H. Wang, Y. N. Chen. WDM free-space optical communication system of high-speed hybrid signals. IEEE Photonics J., 10, 7204207(2018).

[21] M. A. Shemis, E. Alkhazraji, A. M. Ragheb, M. T. A. Khan, M. Esmail, H. Fathallah, S. A. Alshebeili, M. Z. M. Khan. Broadly tunable self-injection locked InAs/InP quantum-dash laser based fiber/FSO/hybrid fiber-FSO communication at 1610 nm. IEEE Photonics J., 10, 7902210(2018).

[22] C. Y. Li, X. H. Huang, H. H. Lu, Y. C. Huang, Q. P. Huang, S. C. Tu. A WDM PAM4 FSO-UWOC integrated system with a channel capacity of 100 Gb/s. J. Lightwave Technol., 38, 1766(2020).

[23] M. A. Shemis, A. M. Ragheb, E. Alkhazraji, M. A. Esmail, H. Fathallah, S. Alshebeili, M. Z. M. Khan. Self-seeded quantum-dash laser based 5 m-128 Gb/s indoor free-space optical communication. Chin. Opt. Lett., 15, 100604(2017).

[24] S. Zhang, Z. X. Wei, Z. Y. Cao, K. M. Ma, C. J. Chen, M. C. Wu, Y. H. Dong, H. Y. Fu. A high-speed visible light communication system using pairs of micro-size LEDs. IEEE Photonics Technol. Lett., 33, 1026(2021).

[25] W. Ali, G. Cossu, L. Gilli, E. Ertunc, A. Messa, A. Sturniolo, E. Ciaramella. 10 Gbit/s OWC system for intra-data centers links. IEEE Photonics Technol. Lett., 31, 805(2019).