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Low-cost hybrid integrated 4 × 25.78 Gb/s CWDM TOSA for 10 km transmission using DFB-LDs and an arrayed waveguide grating multiplexer

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Abstract

We have developed a cost-effective and highly compact 100-Gb/s coarse wavelength division multiplexing (CWDM) transmitter optical subassembly (TOSA) using lens-free hybrid integration. To achieve large alignment tolerances, distributed feedback laser diodes (DFB-LDs) are butt-coupled to a four-channel silica-based planar lightwave circuit (PLC) arrayed waveguide grating, with the silicon sub-mounts and PLC adhesively bonded. Then, a flexible printed circuit is employed to connect the internal DFB-LDs and the exterior of the TOSA package for radiofrequency signal transmission, eliminating the expensive ceramic feed-through. The packaged CWDM TOSA, which is 15.8 mm×7.0 mm×6.0 mm in size, shows a side-mode suppression ratio of >40 dB, a 3 dB bandwidth of >18 GHz, and error-free transmission with an average optical output power of >0 dBm and dynamic extinction ratio of >4.0 dB at 25.78125 Gb/s over a 10 km single-mode fiber for all four lanes.

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DOI:10.1364/prj.6.001067

所属栏目:Optical communications

基金项目:National High Technology Research and Development Program of China (2015AA016904); National Natural Science Foundation of China (NSFC)10.13039/501100001809 (61335002, 61675084, 61775094); Major State Basic Research Development Program of China (2013CB632104, 2013CB933303).

收稿日期:2018-07-31

录用日期:2018-09-19

网络出版日期:2018-09-25

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Jun Liu:Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
Qingzhong Huang:Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, Chinae-mail: huangqz@mail.hust.edu.cn
Shiqi Tao:Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
Cheng Zeng:Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
Jinsong Xia:Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, Chinae-mail: jsxia@hust.edu.cn

联系人作者:联系作者

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引用该论文

Jun Liu, Qingzhong Huang, Shiqi Tao, Cheng Zeng, and Jinsong Xia, "Low-cost hybrid integrated 4 × 25.78 Gb/s CWDM TOSA for 10 km transmission using DFB-LDs and an arrayed waveguide grating multiplexer," Photonics Research 6(11), 1067-1073 (2018)

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