Volume 16 Issue 5
Sep.  2023
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FAN Zuo-wen, JIA Lian-xi, LI Zhao-yi, ZHOU Jing-jie, CONG Qing-yu, ZENG Xian-feng. Method for the simultaneous measurement of waveguide propagation loss and bending loss[J]. Chinese Optics, 2023, 16(5): 1177-1185. doi: 10.37188/CO.EN.2022-0027
Citation: FAN Zuo-wen, JIA Lian-xi, LI Zhao-yi, ZHOU Jing-jie, CONG Qing-yu, ZENG Xian-feng. Method for the simultaneous measurement of waveguide propagation loss and bending loss[J]. Chinese Optics, 2023, 16(5): 1177-1185. doi: 10.37188/CO.EN.2022-0027

Method for the simultaneous measurement of waveguide propagation loss and bending loss

doi: 10.37188/CO.EN.2022-0027
Funds:  Supported by the National Key Research and Development Program of China (No. 2018YFB2200500)
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  • Author Bio:

    Fan Zuowen (1998—), male, from Taian, Shandong Province, obtained his bachelors degree from Shandong University of Technology in 2016, and is a postgraduate student in the Microelectronics Institute, Shanghai University. He is mainly engaged in silicon photonics. E-mail: fanzuowen@shu.edu.cn

    Jia Lianxi (1982—), male, from Zibo, Shandong Province, professor, obtained a bachelors degree from Shandong University in 2005, and a doctorate degree from the Institute of Semiconductors, Chinese Academy of Sciences in 2010. He is mainly engaged in silicon photonics. E-mail: jialx@mail.sim.ac.cn

  • Corresponding author: jialx@mail.sim.ac.cn
  • Received Date: 27 Nov 2022
  • Rev Recd Date: 30 Jan 2023
  • Available Online: 12 Apr 2023
  • The propagation loss of a waveguide is a key indicator to evaluate the performance of an integrated optical platform. The commonly used cut-back method for measuring propagation loss requires the introduction of the spiral test structure. In order to remove bending loss, the bending radius is usually designed to be larger but this consequently has a larger footprint. In this paper, we suggested a method to simultaneously measure the propagation loss and bending loss of waveguides with a cut-back structure. According to simulations, the bending loss can be exponentially fitted with the bending radius, which can be further simplified as linear fitting between the natural logarithm of the bending loss and bending radius. A genetic algorithm was used to fit the insertion loss curve of the cut-back structure and the propagation losses and bending loss were calculated. With this method, we measured a cut-back structure of lithium niobate waveguide and got a propagation loss of 0.558 dB/cm and a bending loss of 0.698 dB/90° at a radius of 100 μm and wavelength of 1550 nm. Using this method, we can simultaneously measure waveguide propagation loss and bending loss while mitigating the footprint.


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  • [1]
    ARIZMENDI L. Photonic applications of lithium niobate crystals[J]. Physica Status Solidi (A), 2004, 201(2): 253-283. doi: 10.1002/pssa.200303911
    WEIS R S, GAYLORD T K. Lithium niobate: summary of physical properties and crystal structure[J]. Applied Physics A, 1985, 37(4): 191-203. doi: 10.1007/BF00614817
    WU R B, WANG M, XU J, et al.. Long low-loss-litium niobate on insulator waveguides with sub-nanometer surface roughness[J]. Nanomaterials, 2018, 8(11): 910. doi: 10.3390/nano8110910
    ZHU D, SHAO L B, YU M J, et al.. Integrated photonics on thin-film lithium niobate[J]. Advances in Optics and Photonics, 2021, 13(2): 242-352. doi: 10.1364/AOP.411024
    RABIEI P, GUNTER P. Optical and electro-optical properties of submicrometer lithium niobate slab waveguides prepared by crystal ion slicing and wafer bonding[J]. Applied Physics Letters, 2004, 85(20): 4603-4605. doi: 10.1063/1.1819527
    POBERAJ G, HU H, SOHLER W, et al.. Lithium niobate on insulator (LNOI) for micro-photonic devices[J]. Laser & Photonics Reviews, 2012, 6(4): 488-503.
    LEVY M, RADOJEVIC A M. Single-crystal lithium niobate films by crystal ion slicing[M]//ALEXE M, GÖSELE U. Wafer Bonding: Applications and Technology. Berlin: Springer, 2004: 417-450.
    ZHANG M, BUSCAINO B, WANG CH, et al.. Broadband electro-optic frequency comb generation in a lithium niobate microring resonator[J]. Nature, 2019, 568(7752): 373-377. doi: 10.1038/s41586-019-1008-7
    XU M Y, HE M B, ZHANG H G, et al.. High-performance coherent optical modulators based on thin-film lithium niobate platform[J]. Nature Communications, 2020, 11(1): 3911. doi: 10.1038/s41467-020-17806-0
    WANG CH, ZHANG M, CHEN X, et al.. Integrated lithium niobate electro-optic modulators operating at CMOS-compatible voltages[J]. Nature, 2018, 562(7725): 101-104. doi: 10.1038/s41586-018-0551-y
    WANG CH, LANGROCK C, MARANDI A, et al.. Ultrahigh-efficiency wavelength conversion in nanophotonic periodically poled lithium niobate waveguides[J]. Optica, 2018, 5(11): 1438-1441. doi: 10.1364/OPTICA.5.001438
    LIN J T, YAO N, HAO ZH ZH, et al.. Broadband quasi-phase-matched harmonic generation in an on-chip monocrystalline lithium niobate microdisk resonator[J]. Physical Review Letters, 2019, 122(17): 173903. doi: 10.1103/PhysRevLett.122.173903
    HE M B, XU M Y, REN Y X, et al.. High-performance hybrid silicon and lithium niobate Mach–Zehnder modulators for 100 Gbit s−1 and beyond[J]. Nature Photonics, 2019, 13(5): 359-364. doi: 10.1038/s41566-019-0378-6
    CAI L T, KONG R R, WANG Y W, et al.. Channel waveguides and y-junctions in x-cut single-crystal lithium niobate thin film[J]. Optics Express, 2015, 23(22): 29211-29221. doi: 10.1364/OE.23.029211
    CAI L T, WANG Y W, HU H. Low-loss waveguides in a single-crystal lithium niobate thin film[J]. Optics Letters, 2015, 40(13): 3013-3016. doi: 10.1364/OL.40.003013
    HU H, YANG J, GUI L, et al.. Lithium niobate-on-insulator (LNOI): status and perspectives[J]. Proceedings of SPIE, 2012, 8431: 84311D.
    KRASNOKUTSKA I, TAMBASCO J L J, LI X J, et al.. Ultra-low loss photonic circuits in lithium niobate on insulator[J]. Optics Express, 2018, 26(2): 897-904. doi: 10.1364/OE.26.000897
    ULLIAC G, COURJAL N, CHONG H M H, et al.. Batch process for the fabrication of LiNbO3 photonic crystals using proton exchange followed by CHF3 reactive ion etching[J]. Optical Materials, 2008, 31(2): 196-200. doi: 10.1016/j.optmat.2008.03.004
    DONG P, QIAN W, LIAO SH R, et al.. Low loss shallow-ridge silicon waveguides[J]. Optics Express, 2010, 18(14): 14474-14479. doi: 10.1364/OE.18.014474
    GUTIERREZ A M, BRIMONT A, AAMER M, et al.. Method for measuring waveguide propagation losses by means of a Mach–Zehnder Interferometer structure[J]. Optics Communications, 2012, 285(6): 1144-1147. doi: 10.1016/j.optcom.2011.11.064
    TAEBI S, KHORASANINEJAD M, SAINI S S. Modified fabry-perot interferometric method for waveguide loss measurement[J]. Applied Optics, 2008, 47(35): 6625-6630. doi: 10.1364/AO.47.006625
    HE Y M, LI ZH S, LU D. A waveguide loss measurement method based on the reflected interferometric pattern of a Fabry-Perot cavity[J]. Proceedings of SPIE, 2018, 10535: 105351U.
    HOLLAND J H. Adaptation in Natural and Artificial Systems: An Introductory Analysis with Applications to Biology, Control, and Artificial Intelligence[M]. Cambridge: The MIT Press, 1992.
    ALONSO J M, ALVARRUIZ F, DESANTES J M, et al.. Combining neural networks and genetic algorithms to predict and reduce diesel engine emissions[J]. IEEE Transactions on Evolutionary Computation, 2007, 11(1): 46-55. doi: 10.1109/TEVC.2006.876364
    VERMA R, LAKSHMINIARAYANAN P A. A case study on the application of a genetic algorithm for optimization of engine parameters[J]. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2006, 220(4): 471-479.
    BAHADORI M, NIKDAST M, CHENG Q X, et al.. Universal design of waveguide bends in silicon-on-insulator photonics platform[J]. Journal of Lightwave Technology, 2019, 37(13): 3044-3054. doi: 10.1109/JLT.2019.2909983
    THYAGARAJAN K, SHENOY M R, GHATAK A K. Accurate numerical method for the calculation of bending loss in optical waveguides using a matrix approach[J]. Optics Letters, 1987, 12(4): 296-298. doi: 10.1364/OL.12.000296
    HAN ZH H, ZHANG P, BOZHEVOLNYI S I. Calculation of bending losses for highly confined modes of optical waveguides with transformation optics[J]. Optics Letters, 2013, 38(11): 1778-1780. doi: 10.1364/OL.38.001778
    STENGER V E, TONEY J, PONICK A, et al. Low loss and low vpi thin film lithium niobate on quartz electro-optic modulators[C]. 2017 European Conference on Optical Communication (ECOC), IEEE, 2017: 1-3.
    LI X P, CHEN K X, HU ZH F. Low-loss bent channel waveguides in lithium niobate thin film by proton exchange and dry etching[J]. Optical Materials Express, 2018, 8(5): 1322-1327. doi: 10.1364/OME.8.001322
    REN T H, ZHANG M, WANG CH, et al.. An integrated low-voltage broadband lithium niobate phase modulator[J]. IEEE Photonics Technology Letters, 2019, 31(11): 889-892. doi: 10.1109/LPT.2019.2911876
    DING T T, ZHENG Y L, CHEN X F. On-chip solc-type polarization control and wavelength filtering utilizing periodically poled lithium niobate on insulator ridge waveguide[J]. Journal of Lightwave Technology, 2019, 37(4): 1296-1300. doi: 10.1109/JLT.2019.2892317
    VLASOV Y A, MCNAB S J. Losses in single-mode silicon-on-insulator strip waveguides and bends[J]. Optics Express, 2004, 12(8): 1622-1631. doi: 10.1364/OPEX.12.001622
    WON Y H, JAUSSAUD P C, CHARTIER G H. Three-prism loss measurements of optical waveguides[J]. Applied Physics Letters, 1980, 37(3): 269-271. doi: 10.1063/1.91903
    REGENER R, SOHLER W. Loss in low-finesse Ti: LiNbO3 optical waveguide resonators[J]. Applied Physics B, 1985, 36(3): 143-147.
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