Analysis of the enhanced coupling efficiency for different profile curves of special optical taper
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Abstract:
For enhancing the coupling efficiency between the beam and the photodiode, a special optical taper is proposed for receiving optical signal. Based on the circular symmetric structure of special optical taper, the profile curve equations of it are deduced, including the trigonometric function type, parabolic type and exponential type. Moreover, the coupling efficiencies for special optical tapers with different profile curves are studied. The relationships of incident position, incident angle and coupling efficiency are analyzed. Finally, the comparison of coupling efficiency analytical results is also given.
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This work has been supported by the National Natural Science Foundation of China （No.61205068）, the Hebei Provincial Natural Science Foundation （No.F2012203148）, the Excellent Youth Funds for School of Information Science and Engineering （No.2014201）, the Doctoral Funds of Yanshan University of China （No.B768）, and the STCSM （No. SKLSFO2011-06）.
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