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《Photonics Research》 2019年09期
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Apodized silicon photonic grating couplers for mode-order conversion

IOSIF DEMIRTZIOGLOU  COSIMO LACAVA  ABDUL SHAKOOR  ALI KHOKHAR  YONGMIN JUNG  DAVID J.THOMSON  PERIKLIS PETROPOULOS  
【摘要】:An out-of-plane silicon grating coupler capable of mode-order conversion at the chip–fiber interface is designed and fabricated. Optimization of the structure is performed through finite-difference time-domain simulations,and the final device is characterized through far-field profile and transmission measurements. A coupling loss of 3.1 dB to a commercial two-mode fiber is measured for a single TE_0→ LP_(11) mode conversion grating, which includes a conversion penalty of 1.3 dB. Far-field patterns of the excited LP_(11) mode profile are also reported.

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