Abstract
In this paper, a unique device that can act as both multiplexer and demultiplexer is proposed with two all-metal compensating rods that makes the compensated chip almost the same spectrum profile as the original one. In this way a flat-top athermal arrayed-waveguide grating module of is successfully fabricated. A small center wavelength shift of is achieved for the ultra-wide temperature range from to 85°C with the low insertion loss change of less than .
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