16 November 2016 Large-mode-volume multiwaveguide distributed feedback resonator
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Abstract
We propose a multiwaveguide cavity which can significantly enlarge the mode volume of distributed feedback (DFB) cavity without increasing the cavity length. The cavity is constructed by combining λ/4 shifted DFB cavity with contra-directional couplers. Different from single-waveguide DFB cavity, the resonant mode is oscillating in multiple waveguides. A smaller threshold gain density is also obtained compared to single-waveguide DFB cavity. Theory model of the multiwaveguide cavity is established and finite-difference time-domain simulation is performed to verify the model.
© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
Xiangjie Zhao, Cheng Zeng, Ge Gao, Jinsong Xia, "Large-mode-volume multiwaveguide distributed feedback resonator," Optical Engineering 55(11), 116105 (16 November 2016). https://doi.org/10.1117/1.OE.55.11.116105 . Submission:
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