A graphene Mach-Zehnder intensity modulator and its linearization method
An intensity modulator and ene Mach technology, applied in the field of optoelectronics, can solve problems such as poor linearity modulation characteristics, and achieve the effects of improving linearity, improving spurious-free dynamic range, and fast response characteristics
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Embodiment 1
[0034] A graphene Mach-Zehnder intensity modulator comprising a first modulation arm, a second modulation arm, a first positive electrode 3, a second positive electrode 4, a negative electrode 5 and a substrate layer 11, the first modulation arm 1 and the second modulation arm The two modulation arms 2 are graphene ridge waveguides 12, and the two modulation arms constitute a Mach-Zehnder interference structure; the graphene ridge waveguides 12 comprise first ridges 6, graphene layers 8, The second ridge 7; the first ridge 6 and the graphene layer 8 are isolated by the first isolation layer 9, and the second ridge 7 and the graphene layer 8 are isolated by the second isolation layer 10; the first positive electrode 3 and The second positive electrode 4 is located on the graphene layer 8 extending from the graphene ridge waveguide 12 , and the negative electrode 5 is located on the first isolation layer 9 extending from the graphene ridge waveguide 12 .
[0035] Such as Figur...
Embodiment 2
[0040] Such as Figure 1-5 Shown, a kind of graphene Mach-Zehnder intensity modulator and linearization method linearization method thereof comprise the following steps:
[0041] Step 1: Determining the thickness h of the first ridge 6 1 , width w 1 , the thickness h of the second ridge 7 2 , width w 2 , the thickness h of the first isolation layer 9 3 , width w 3 , the thickness h of the second isolation layer 10 4 , width w 4 , the length L of the first modulation arm 1 and the second modulation arm 2;
[0042] Step 2: Design a graphene Mach-Zehnder electro-optic modulator according to the parameters obtained in step 1, and fix the bias voltage of any modulation arm of the modulator to v 0 , this arm is denoted as modulating arm 1, and the other modulating arm is denoted as modulating arm 2. The light wave of constant power TE mode is incident from the input end of the modulator, and the bias voltage v of the modulation arm 2 is changed 1 , measure the output optic...
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