16-channel dual-tuning wavelength division multiplexer/demultiplexer<xref rid="cpb_27_12_124208fn1" ref-type="fn">*</xref><fn id="cpb_27_12_124208fn1"><label>*</label><p>Project supported by the National Key Research and Development Program of China (Grant No. 2016YFB0402504) and the National Nature Science Foundation of China (Grant No. 61435013).</p></fn>

16-channel dual-tuning wavelength division multiplexer/demultiplexer**

Project supported by the National Key Research and Development Program of China (Grant No. 2016YFB0402504) and the National Nature Science Foundation of China (Grant No. 61435013).

Yuan Pei^{1, 2}, Wang Yue^{1, †}, Wu Yuan-Da^{1, 2, ‡}, An Jun-Ming^{1, 2}, Hu Xiong-Wei¹

(color online) Schematic diagram of (a) top view of wavelength division multiplexer/demultiplexer with dual-tunable function, (b) heater structure, and (c) VOA structure.