[1] Xie J Y, Zhou L J, Zou Z et al. Continuously tunable reflective-type optical delay lines using microring resonators[J]. Optics Express, 22, 817-823(2014). http://europepmc.org/abstract/med/24515041

[2] Cardenas J, Foster M A, Sherwood-Droz N et al. Wide-bandwidth continuously tunable optical delay line using silicon microring resonators[J]. Optics Express, 18, 26525-26534(2010). http://www.ncbi.nlm.nih.gov/pubmed/21165004

[3] Liu Y, Wichman A, Isaac B et al. Single ring resonator delays for integrated optical beam forming networks. [C]∥2016 IEEE International Topical Meeting on Microwave Photonics (MWP), October 31-November 3, 2016, Long Beach, CA, USA. New York: IEEE, 321-324(2016).

[4] Zhuang L M. Roeloffzen C G H, Meijerink A, et al. Novel ring resonator-based integrated photonic beamformer for broadband phased array receive antennas—part II: experimental prototype[J]. Journal of Lightwave Technology, 28, 19-31(2010).

[5] Shen F F, Su X X, Yang S C et al. Design of time delay network for optical beamforming based on anti-resonant waveguide micro-rings[J]. Acta Optica Sinica, 39, 0213001(2019).

[6] vanWiggeren G D, Motamedi A R, Barley D M. Single-scan interferometric component analyzer[J]. IEEE Photonics Technology Letters, 15, 263-265(2003). http://ieeexplore.ieee.org/xpls/icp.jsp?arnumber=1174140

[7] Gifford D K, Soller B J, Wolfe M S et al. Optical vector network analyzer for single-scan measurements of loss, group delay, and polarization mode dispersion[J]. Applied Optics, 44, 7282-7286(2005). http://www.opticsinfobase.org/ao/abstract.cfm?id=86391

[8] Niemi T, Uusimaa M, Ludvigsen H. Limitations of phase-shift method in measuring dense group delay ripple of fiber Bragg gratings[J]. IEEE Photonics Technology Letters, 13, 1334-1336(2001). http://ieeexplore.ieee.org/xpls/icp.jsp?arnumber=969899

[9] Liu Y, Wichman A, Isaac B et al. Tuning optimization of ring resonator delays for integrated optical beam forming networks[J]. Journal of Lightwave Technology, 35, 4954-4960(2017). http://ieeexplore.ieee.org/document/8067653/

[10] Román J E, Frankel M Y, Esman R D. Spectral characterization of fiber gratings with high resolution[J]. Optics Letters, 23, 939-941(1998).

[11] Tang Z Z, Pan S L, Yao J P. A high resolution optical vector network analyzer based on a wideband and wavelength-tunable optical single-sideband modulator[J]. Optics Express, 20, 6555-6560(2012). http://www.ncbi.nlm.nih.gov/pubmed/22418538

[12] Xue M, Pan S L. Influence of unwanted first-order sideband on optical vector analysis based on optical single-sideband modulation[J]. Journal of Lightwave Technology, 35, 2580-2586(2017). http://ieeexplore.ieee.org/document/7903706/

[13] Wang M G, Yao J P. Optical vector network analyzer based on unbalanced double-sideband modulation[J]. IEEE Photonics Technology Letters, 25, 753-756(2013). http://ieeexplore.ieee.org/document/6470645/

[14] Pan S L, Xue M. Ultrahigh-resolution optical vector analysis based on optical single-sideband modulation[J]. Journal of Lightwave Technology, 35, 836-845(2017). http://ieeexplore.ieee.org/document/7534853/

[15] Li W, Liu J G, Zhu N H. Optical vector network analyzer with improved accuracy based on polarization modulation and polarization pulling[J]. Optics Letters, 40, 1679-1682(2015). http://www.opticsinfobase.org/ol/abstract.cfm?uri=ol-40-8-1679

[16] Li W, Sun W H, Wang W T et al. Reduction of measurement error of optical vector network analyzer based on DPMZM[J]. IEEE Photonics Technology Letters, 26, 866-869(2014). http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6748915

[17] Xue M, Pan S L, Zhao Y J. Accurate optical vector network analyzer based on optical single-sideband modulation and balanced photodetection[J]. Optics Letters, 40, 569-572(2015). http://ieeexplore.ieee.org/document/6617204/

[18] Xue M, Pan S L, Zhao Y J. Accuracy improvement of optical vector network analyzer based on single-sideband modulation[J]. Optics Letters, 39, 3595-3598(2014). http://www.ncbi.nlm.nih.gov/pubmed/24978545

[19] Devgan P S, Brown D P, Nelson R L. RF performance of single sideband modulation versus dual sideband modulation in a photonic link[J]. Journal of Lightwave Technology, 33, 1888-1895(2015).

[20] Lenz G, Eggleton B J, Madsen C K et al. Optical delay lines based on optical filters[J]. IEEE Journal of Quantum Electronics, 37, 525-532(2001). http://ieeexplore.ieee.org/xpls/icp.jsp?arnumber=914401