Abstract
A precisely tunable true time delay line (TTDL) based on lithium niobate on insulator waveguide grating is proposed. Utilizing the electro-optic effect of lithium niobate, active tuning of reflected wavelength and time delay can be realized. The numerical simulation results show that, with the optimized grating structure and flexible electrode distribution, wide tuning range and high tuning accuracy of time delay can be achieved by simply controlling the charging position of the electrodes. This TTDL is applied to a tunable bandpass microwave photonic filter (TBMPF), which using PM-IM conversion to suppressed dc signal to achieve bandpass. In the TBMPF, the TTDL plays the role of introducing the dispersion for PM-IM conversion, time delay between the taps and tuning of central frequency. This TTDL can reduce the system complexity and cost of microwave photonic filter.
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References
Arizmendi, L.: Review article: photonic applications of lithium niobate crystals. Phys Status Solidi A 201(2), 175–175 (2004)
Ashrafi, R., Dizaji, M.R., Cortés, L.R., et al.: Time-delay to intensity mapping based on a second-order optical integrator: application to optical arbitrary waveform generation. Optics Expr 23(12), 16209 (2015)
Capmany, J., Novak, D.: Microwave photonics combines two worlds. Nat Photonics 6, 319–330 (2007)
Fandiño, J.S., Munoz, P., Domenech, D., et al.: A monolithic integrated photonic microwave filter. Nat Photonics 11(2), 124–129 (2017)
Gao, Y., Li, S., Xue, X., et al.: W-Band high-Q Microwave Photonic Filter with the Third-Order Dispersion Pre-Compensation. J Lightwave Technol 27(99), 1–1 (2018)
Garcia, S., Gasulla, I.: Dispersion-engineered multicore fibers for distributed radiofrequency signal processing. Opt Express 24, 20641–20654 (2016)
García, S., Guillem, R., Madrigal, J., Barrera, D., Sales, S., Gasulla, I.: Sampled true time delay line operation by inscription of long period gratings in few-mode fibers. Opt Express 27, 22787–22793 (2019)
Gasulla, I., Barrera, D., Hervás, J., and Sales, S.:"Spatial Division Multiplexed Microwave Signal processing by selective grating inscription in homogeneous multicore fibers". Sci. Reports, no. 41727, 1–10, (2017)
Han, X., Yao, J.: Bandstop-to-bandpass microwave photonic filter using a phase-shifted fiber bragg grating. J Lightwave Technol 33(24), 1–1 (2015)
Hopfer, S., Shani, Y., Nir, D.: A novel, wideband, lithium niobate electrooptic modulator. J Lightwave Technol 16(1), 73–77 (1998)
Hui, H. et al.: Lithium niobate-on-insulator (LNOI): status and perspectives. SPIE Photonics Europe International Society for Optics and Photonics 8431(2), 84311D–84311D-8 (2012)
Huo, L., Gan, L., Shen, L., et al.: Reconfigurable microwave photonic filter based on long period gratings inscribed in multicore fibers. IEEE Photonics J 11(1), 1–8 (2019)
Jing, J., Wang, X., Lu, L., et al.: Reconfigurable RF notch filter based on an integrated silicon optical true time delay line. J Phys D Appl Phys 52(19), 194001 (2019)
Jung, B.M., Yao, J. A Two-Dimensional Optical True Time-Delay Beamformer Consisting of a Fiber Bragg Grating Prism and Switch-Based Fiber-Optic Delay Lines. IEEE Photonics Technology Letters 21(10),0-629 (2019)
Krasnokutska, I., Tambasco, J.J., Li, X., et al.: Ultra-low loss photonic circuits in lithium niobate on insulator. Opt Express 26(2), 897–904 (2018)
Li, J., Yin, R., Huang, Q., et al.: AWG optical filter with tunable central wavelength and bandwidth based on LNOI and electro-optic effect. Optics Communications 454, 124445 (2019)
Lin, D., et al.: A tunable optical delay line based on cascaded silicon nitride microrings for ka-band beamforming. IEEE Photonics J. 11(5), 1–10 (2019)
Mahmoud, M., Cai, L., Bottenfield, C., et al.: Lithium niobate electro-optic racetrack modulator etched in Y-Cut LNOI platform. IEEE Photonics J 10(1), 1–10 (2018)
Marpaung, D., Yao, J., Capmany, J.: New opportunities for integrated microwave photonics. J Lightwave Technol 32(20), 3785–3796 (2018)
Mercante, A.J., Shi, S., Yao, P., et al.: Thin film lithium niobate electro-optic modulator with terahertz operating bandwidth. Opt Express 26(11), 14810–14816 (2018)
Ortega, B., Cruz, J.L., Capmany, J., et al.: Analysis of a microwave time delay line based on a perturbed uniform fiber Bragg grating operating at constant wavelength. J Lightwave Technol 18(3), 430–436 (2000)
Porzi, C., Serafino, G., Velha, P., et al.: Integrated SOI high-order phase shifted bragg grating for microwave photonics signal processing. J Lightwave Technol 35(99), 1–1 (2017)
Shin, J.D., Lee, B.S., Kim, B.G.: Optical true time-delay feeder for X-band phased array antennas composed of 2×2 optical MEMS switches and fiber delay lines. IEEE Photonics Technol Letters 16(5), 1364–1366 (2004)
Soref, R.A., De Leonardis, F., Passaro, V.M.N.: Integrated on-chip bragg time-delay system for thermo-optical control of a microwave antenna. J Lightwave Technol 36(99), 1–1 (2018a)
Toroghi, S., Fisher, C., Khan, S., et al.: Performance comparison of grating-assisted integrated photonic delay lines. J Lightwave Technol 34(23), 5431–5436 (2016)
Wang, J., Ashrafi, R., Adams, R., Glesk, I., Gasulla, J., Capmany, L., Chen, R. "Subwavelength grating enabled on-chip ultra-compact optical true time delay line", Nature Scientific Reports 6 (30235), 1–10, 4, (2016).
Wang, C., Xiong, X., Andrade, N., et al.: Second harmonic generation in nano-structured thin-film lithium niobate waveguides. Opt Express 25(6), 6963–6973 (2017)
Wang, Xu, Zhao, Y., Ding, Y., Xiao, S., Dong, J.: Tunable optical delay line based on integrated grating-assisted contradirectional couplers. Photon Res 6, 880–886 (2018a)
Wang, C., Zhang, M., Chen, X., et al.: Integrated lithium niobate electro-optic modulators operating at CMOS-compatible voltages. Nature 562(7725), 101–104 (2018b)
Wang, B., Ping, Lu, Mihailov, S.J., Fan, X., Yao, J.: Real-time and high-precision interrogation of a linearly chirped fiber bragg grating sensor array based on dispersive time delay and optical pulse compression. Opt Lett 44, 3246–3249 (2019)
Xu, L., Hou, J., Tang, H., et al.: Silicon-on-insulator-based microwave photonic filter with widely adjustable bandwidth. Photonics Res 7(2), 110 (2019)
Yao, J., Zhang, W.: On-chip silicon photonic integrated frequency-tunable bandpass microwave photonic filter. Opt Lett 43(15), 3622–3625 (2018)
Yang, H., Li, J., Zheng, P., Hu, G., Yun, B., Cui, Y.: A stopband and passband switchable microwave photonic filter based on integrated dual ring coupled Mach–Zehnder interferometer. IEEE Photonics J 11(4), 1–8 (2019)
Ye, X., Zhang, F., Pan, S.: Compact optical true time delay beamformer for a 2D phased array antenna using tunable dispersive elements. Opt Lett 41(17), 3956–3959 (2016)
Zou, X., Bai, W., Wei, C., et al.: Microwave photonics for featured applications in high-speed railways: communications, detection, and sensing. J Lightwave Technol 36(99), 1–1 (2018)
Zheng, D., Madrigal, J., Barrera, D., et al.: Microwave photonic filtering for interrogating fbg-based multicore fiber curvature sensor. IEEE Photonics Technol Letters 6(6), 1–1 (2017)
Zheng, P., et al.: A seven bit silicon optical true time delay line for ka-band phased array antenna. IEEE Photonics J 11(4), 1–9 (2019)
Acknowledgement
This study was supported by National natural science foundation (61571273, 61771292, 31430031-2), The National Key Research and Development Program of China (2017YFC0803403), Natural Science Foundation of Shandong Province of China (ZR2016FM29) and the Fundamental Research Funds of Hisense Broadband.
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Gong, Z., He, B., Ji, W. et al. LNOI waveguide grating based true time delay line for tunable bandpass microwave photonic filter. Opt Quant Electron 52, 427 (2020). https://doi.org/10.1007/s11082-020-02552-w
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DOI: https://doi.org/10.1007/s11082-020-02552-w