Abstract

In this study, a beam-coupling system is designed to improve the coupling efficiency of achip-integrated spectrometer when the waveguide is arranged in a linear and discrete manner. In the proposed system the beam is shaped to be anti-Gaussian, to deposit adequate energy in the edge waveguides. The beam is discretely coupled to the corresponding waveguide by a microlens array, to improve the coupling efficiency, and is compressed by a toroidal lens to match the linear discrete waveguides. Based on the findings of this study, the coupling efficiency of the spectrometer is shown to increase by a factor of 2.57. Accordingly, this study provides a reference basis for the improvement of the coupling efficiency of other similar spectrometers.

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  1. C.-X. Liu, S. Cheng, J.-H. Zhao, W.-N. Li, W. Wei, B. Peng, and H-.T. GuoMonomode optical planar and channel waveguides in Yb3+-doped silicate glasses formed by helium ion implantationOpt. Laser Technol.2013441014
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  11. D. Benedikovic, P. Cheben, J. H. Schmid, D.-X. Xu, B. Lamontagne, S. Wang, J. Lapointe, R. Halir, A.-O. Moñux, S. Janz, and M. DadoSubwavelength index engineered surface grating coupler with sub-decibel efficiency for 220-nm silicon-on-insulator waveguidesOpt. Express2015232262822635
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  13. J. A. Hoffnagle and C. M. JeffersonBeam shaping with a plano-aspheric lens pairOpt. Eng.20034230903100
  14. C. Wang and D. L. ShealyDesign of gradient-index lens systems for laser beam reshapingAppl. Opt.19933247634769
  15. S. Kim, D. A. Westly, B. J. Roxworthy, Q. Li, A. Yulaev, K. Srinivasan, and V. A. AksyukPhotonic waveguide to free-space Gaussian beam extreme mode converterLight: Sci. Appl.2018772
  16. W. Choi, R. Shin, J. Lim, and S. KangDesign methodology for a confocal imaging system using an objective microlens array with an increased working distanceSci. Rep.2016633278

Other (16)

C.-X. Liu, S. Cheng, J.-H. Zhao, W.-N. Li, W. Wei, B. Peng, and H-.T. GuoMonomode optical planar and channel waveguides in Yb3+-doped silicate glasses formed by helium ion implantationOpt. Laser Technol.2013441014

Y. Wang, X.-L. Shen, Q.-F. Zhu, and C.-X. LiuOptical planar and ridge waveguides in terbium gallium garnet crystals produced by ion implantation and precise diamond blade dicingOpt. Mater. Express2018832883294

M. Yang, M. Li, and J.-J. HeStatic FT imaging spectrometer based on a modified waveguide MZI arrayOpt. Lett.20174226752678

M.-C. Oh, W.-S. Chu, K.-J. Kim, and J.-W. KimPolymer waveguide integrated-optic current transducersOpt. Express20111993929400

K. S. ChiangDevelopment of optical polymer waveguide devicesProc. SPIE20107605760507

G. Chen, Z.-Y. Wen, Z.-Q. Wen, Z.-P. Jiang, and S.-L. HuangThe experimental test of a reflecting hybrid micro fiber spectrometerSpectrosc. Spectral Anal.200323612321236

J. Ozhikandathil and M. PackirisamyNano-islands integrated evanescence-based lab-on-a-chip on silica-on-silicon and polydimethylsiloxane hybrid platform for detection of recombinant growth hormoneBiomicrofluidics20126046501

T. Shoji, T. Tsuchizawa, T. Watanabe, K. Yamada, and H. MoritaLow loss mode size converter from 0.3 µm square Si wire waveguides to singlemode fibresElectron. Lett.20023816691670

F. V. Laere, G. Roelkens, M. Ayre, J. Schrauwen, D. Taillaert, D. V. Thourhout, T. F. Krauss, and R. BaetsCompact and highly efficient grating couplers between optical fiber and nanophotonic waveguidesJ. Lightwave Technol.200725151156

B. Zhang and Z.-Y. WenDevelopment and performance test of a micro fiber spectrometerSemicond. Optoelectron.200728147

D. Benedikovic, P. Cheben, J. H. Schmid, D.-X. Xu, B. Lamontagne, S. Wang, J. Lapointe, R. Halir, A.-O. Moñux, S. Janz, and M. DadoSubwavelength index engineered surface grating coupler with sub-decibel efficiency for 220-nm silicon-on-insulator waveguidesOpt. Express2015232262822635

K. Feng and J. LiDesign of aspherics lenses shaping system on Gaussian beamOpto-Electron. Eng.201340127132

J. A. Hoffnagle and C. M. JeffersonBeam shaping with a plano-aspheric lens pairOpt. Eng.20034230903100

C. Wang and D. L. ShealyDesign of gradient-index lens systems for laser beam reshapingAppl. Opt.19933247634769

S. Kim, D. A. Westly, B. J. Roxworthy, Q. Li, A. Yulaev, K. Srinivasan, and V. A. AksyukPhotonic waveguide to free-space Gaussian beam extreme mode converterLight: Sci. Appl.2018772

W. Choi, R. Shin, J. Lim, and S. KangDesign methodology for a confocal imaging system using an objective microlens array with an increased working distanceSci. Rep.2016633278

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