Athermal Arrayed Waveguide Grating Wavelength Division Multiplexer

An athermal arrayed waveguide grating wavelength division multiplexer, comprising:

• a base board including an arrayed waveguide grating chip, the arrayed waveguide grating chip having a planar substrate on which an input optical waveguide, an input slab waveguide, a plurality of strip waveguides, an output slab waveguide and multiple output optical waveguides which are sequentially coupled, and wherein the base board and the arrayed waveguide grating chip are divided into a first portion and a second portion through at least one division plane, wherein the division plane runs through at least one of the input slab waveguide and the output slab waveguide;
• and
• a sliding deflection component positioned on the base board, the sliding deflection component including a first end and a second end which are respectively fixed on the first portion and the second portion, the sliding deflection component including:
• a telescopic rod having a length that changes with temperature variation,
• a first sidewall and a second sidewall positioned at two ends of the telescopic rod, respectively, and
• a first deflection limiting piece fixed on one side of the telescopic rod such that a clearance is formed between at least one portion of a first end face of the first deflection limiting piece and an inner surface of the first sidewall of the telescopic rod.