Efficient and compact photonic lanterns through cascaded tapering

Lijie Hou; Zhiqun Yang; Linbo Yang; Yaping Liu; Lin Zhang

doi:10.1117/12.2607950

3 March 2022 Efficient and compact photonic lanterns through cascaded tapering

Lijie Hou, Zhiqun Yang, Linbo Yang, Yaping Liu, Lin Zhang

Proceedings Volume 12028, Next-Generation Optical Communication: Components, Sub-Systems, and Systems XI; 1202804 (2022) https://doi.org/10.1117/12.2607950
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

With the number of modes in photonic lantern (PL) increasing, a longer adiabatic taper is required, which is not feasible for fabrication. A cascaded-taper-based PL is proposed as a type of efficient and compact multiplexer/demultiplexer. It has many advantages to design and draw the PL through multi-taper cascade. For the double-taper PL with its longitudinal profile optimized, the coupling efficiency of mode group LP01 and LP11 reaches its optimal value of 90.8% and 90.0% when the length is 5.15 cm, while the corresponding efficiency of the single-taper PL is only 74.6% and 85.6%, respectively. Besides, the triple-taper PL optimized with the same material has a length of 4.65 cm. The optimal coupling efficiency of mode group LP01 and LP11 is 89.5% and 89.1%, while the single-taper PL with the same length is only 72.6% and 84.4%, respectively. Without loss of generality, the optimal adiabatic taper profiles of the two-modegroup PLs are obtained by beam propagation method. As a comparison, only when the length of the single-taper twomode- group PLs is 9 cm, the coupling efficiency of mode group LP01 and LP11 reaches the optimal values of 92.4% and 94.1% respectively. Although the optimal coupling efficiency of the double-taper and triple-taper PLs is slightly lower than that of the optimal single-taper ones, they will exhibit better performance when the length must be shorter.

Conference Presentation

Citation Download Citation

Lijie Hou, Zhiqun Yang, Linbo Yang, Yaping Liu, and Lin Zhang "Efficient and compact photonic lanterns through cascaded tapering", Proc. SPIE 12028, Next-Generation Optical Communication: Components, Sub-Systems, and Systems XI, 1202804 (3 March 2022); https://doi.org/10.1117/12.2607950

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