Lasers, Fiber Optics, and Communications

Large-mode-volume multiwaveguide distributed feedback resonator

[+] Author Affiliations
Xiangjie Zhao, Cheng Zeng, Ge Gao, Jinsong Xia

Huazhong University of Science and Technology, Wuhan National Laboratory for Optoelectronics, Luoyu Road 1037, Wuhan 430074, China

Opt. Eng. 55(11), 116105 (Nov 16, 2016). doi:10.1117/1.OE.55.11.116105
History: Received June 14, 2016; Accepted September 21, 2016
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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.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Xiangjie Zhao ; Cheng Zeng ; Ge Gao and Jinsong Xia
"Large-mode-volume multiwaveguide distributed feedback resonator", Opt. Eng. 55(11), 116105 (Nov 16, 2016). ; http://dx.doi.org/10.1117/1.OE.55.11.116105


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