[1] D. Gauthier. Slow light brings faster communications. Phys. World, 18, 30-32(2005).
[2] J. T. Mok, B. J. Eggleton. Photonics: expect more delays. Nature, 433, 811-812(2005).
[3] L. Zhou, X. Wang, L. Lu, J. Chen. Integrated optical delay lines: a review and perspective [Invited]. Chin. Opt. Lett., 16, 101301(2018).
[4] R. S. Tucker, P.-C. Ku, C. J. Chang-Hasnain. Slow-light optical buffers: capabilities and fundamental limitations. J. Lightwave Technol., 23, 4046-4066(2005).
[5] Z. Wang, N. Chi, S. Yu. Time-slot interchange using an optical buffer with a large variable delay range based on an active-vertical-coupler crosspoint switch. Opt. Eng., 45, 105003(2006).
[6] M. Moralis-Pegios, G. Mourgias-Alexandris, N. Terzenidis, M. Cherchi, M. Harjanne, T. Aalto, A. Miliou, N. Pleros, K. Vyrsokinos. On-chip SOI delay line bank for optical buffers and time slot interchangers. IEEE Photon. Technol. Lett., 30, 31-34(2018).
[7] P. Zheng, C. Wang, X. Xu, J. Li, D. Lin, G. Hu, R. Zhang, B. Yun, Y. Cui. A seven bit silicon optical true time delay line for Ka-band phased array antenna. IEEE Photon. J., 11, 5501809(2019).
[8] C. Zhu, L. Lu, W. Shan, W. Xu, G. Zhou, L. Zhou, J. Chen. Silicon integrated microwave photonic beamformer. Optica, 7, 1162-1170(2020).
[9] P. Zheng, X. Xu, D. Lin, P. Liu, G. Hu, B. Yun, Y. Cui. A wideband 1 × 4 optical beam-forming chip based on switchable optical delay lines for Ka-band phased array. Opt. Commun., 488, 126842(2021).
[10] S. Li, X. Li, W. Zou, J. Chen. Rangeability extension of fiber-optic low-coherence measurement based on cascaded multistage fiber delay line. Appl. Opt., 51, 771-775(2012).
[11] S. Granieri, M. Jaeger, A. Siahmakoun. Multiple-beam fiber-optic beamformer with binary array of delay lines. J. Lightwave Technol., 21, 3262-3272(2003).
[12] E. Choi, J. Na, S. Y. Ryu, G. Mudhana, B. H. Lee. All-fiber variable optical delay line for applications in optical coherence tomography: feasibility study for a novel delay line. Opt. Express, 13, 1334-1345(2005).
[13] M. Yessenov, A. F. Abouraddy. Demonstration of a free-space optical delay line using space-time wave packets. Frontiers in Optics + Laser Science APS/DLS, FW1C.1(2019).
[14] X. Wang, L. Zhou, R. Li, J. Xie, L. Lu, K. Wu, J. Chen. Continuously tunable ultra-thin silicon waveguide optical delay line. Optica, 4, 507-515(2017).
[15] Y. Wang, H. Sun, M. Khalil, W. Dong, I. Gasulla, J. Capmany, L. R. Chen. On-chip optical true time delay lines based on subwavelength grating waveguides. Opt. Lett., 46, 1405-1408(2021).
[16] J. Xie, L. Zhou, Z. Li, J. Wang, J. Chen. Seven-bit reconfigurable optical true time delay line based on silicon integration. Opt. Express, 22, 22707-22715(2014).
[17] Z. Ke, R. Ge, X. Cai. Tunable optical true time delay line based on ring array. Asia Communications and Photonics Conference (ACP), S3F.4(2018).
[18] R. L. Moreira, J. Garcia, W. Li, J. Bauters, J. S. Barton, M. J. R. Heck, J. E. Bowers, D. J. Blumenthal. Integrated ultra-low-loss 4-bit tunable delay for broadband phased array antenna applications. IEEE Photon. Technol. Lett., 25, 1165-1168(2013).
[19] K. Horikawa, I. Ogawa, H. Ogawa, T. Kitoh. Photonic switched true time delay beam forming network integrated on silica waveguide circuits. Proceedings of 1995 IEEE MTT-S International Microwave Symposium, 61, 65-68(1995).
[20] M. S. Rasras, J. L. Grange, C. K. Madsen, M. A. Cappuzzo, E. Chen, L. Gomez, E. J. Laskowski, A. Griffin, A. Wong-Foy, A. Kasper, S. S. Patel. Integrated scalable continuously tunable variable optical delay lines. IEEE LEOS Annual Meeting Conference Proceedings, 736-737(2005).
[21] X. Wang, B. Howley, M. Y. Chen, R. T. Chen. Phase error corrected 4-bit true time delay module using a cascaded 2 × 2 polymer waveguide switch array. Appl. Opt., 46, 379-383(2007).
[22] D. Thomson, A. Zilkie, J. E. Bowers, T. Komljenovic, G. T. Reed, L. Vivien, D. Marris-Morini, E. Cassan, L. Virot, J.-M. Fédéli, J.-M. Hartmann, J. H. Schmid, D.-X. Xu, F. Boeuf, P. O’Brien, G. Z. Mashanovich, M. Nedeljkovic. Roadmap on silicon photonics. J. Opt., 18, 073003(2016).
[23] M. Li, L. Wang, X. Li, X. Xiao, S. J. P. R. Yu. Silicon intensity Mach–Zehnder modulator for single lane 100 Gb/s applications. Photon. Res., 6, 109-116(2018).
[24] D. Zhu, L. Shao, M. Yu, R. Cheng, B. Desiatov, C. J. Xin, Y. Hu, J. Holzgrafe, S. R. Ghosh, A. Shams-Ansari, E. Puma, N. Sinclair, C. Reimer, M. Zhang, L. Marko. Integrated photonics on thin-film lithium niobate. Adv. Opt. Photon., 13, 242-352(2021).
[25] C. Wang, M. Zhang, X. Chen, M. Bertrand, A. Shams-Ansari, S. Chandrasekhar, P. Winzer, M. Lončar. Integrated lithium niobate electro-optic modulators operating at CMOS-compatible voltages. Nature, 562, 101-104(2018).
[26] M. Xu, M. He, H. Zhang, J. Jian, Y. Pan, X. Liu, L. Chen, X. Meng, H. Chen, Z. Li, X. Xiao, S. Yu, S. Yu, X. Cai. High-performance coherent optical modulators based on thin-film lithium niobate platform. Nat. Commun., 11, 3911(2020).
[27] B. Pan, H. Cao, Y. Huang, Z. Wang, K. Chen, H. Li, Z. Yu, D. Dai. Compact electro-optic modulator on lithium niobate. Photon. Res., 10, 697-702(2022).
[28] Z. Lin, Y. Lin, H. Li, M. Xu, M. He, W. Ke, H. Tan, Y. Han, Z. Li, D. Wang, X. S. Yao, S. Fu, S. Yu, X. Cai. High-performance polarization management devices based on thin-film lithium niobate. Light Sci. Appl., 11, 93(2022).
[29] J.-X. Zhou, R.-H. Gao, J. Lin, M. Wang, W. Chu, W.-B. Li, D.-F. Yin, L. Deng, Z.-W. Fang, J.-H. Zhang, R.-B. Wu, Y. Cheng. Electro-optically switchable optical true delay lines of meter-scale lengths fabricated on lithium niobate on insulator using photolithography assisted chemo-mechanical etching. Chin. Phys. Lett., 37, 084201(2020).
[30] Y. Pan, M. He, M. Xu, Z. Lin, Y. Lin, W. Ke, J. Liu, Z. Lin, Y. Zhu, S. Gao, H. Li, X. Liu, C. Liu, S. Yu, X. Cai. Compact substrate-removed thin-film lithium niobate electro-optic modulator featuring polarization-insensitive operation. Opt. Lett., 47, 1818-1821(2022).
[31] M. Bahadori, M. Nikdast, Q. Cheng, K. Bergman. Universal design of waveguide bends in silicon-on-insulator photonics platform. J. Lightwave Technol., 37, 3044-3054(2019).
[32] X. Jiang, H. Wu, D. Dai. Low-loss and low-crosstalk multimode waveguide bend on silicon. Opt. Express, 26, 17680-17689(2018).
[33] L. H. Gabrielli, D. Liu, S. G. Johnson, M. Lipson. On-chip transformation optics for multimode waveguide bends. Nat. Commun., 3, 1217(2012).
[34] D. Dai. Multimode optical waveguide enabling microbends with low inter-mode crosstalk for mode-multiplexed optical interconnects. Opt. Express, 22, 27524-27534(2014).
[35] Q. Song, Z. Hu, K. Chen. Scalable and reconfigurable true time delay line based on an ultra-low-loss silica waveguide. Appl. Opt., 57, 4434-4439(2018).