CPC G02F 1/212 (2021.01) [G01M 11/30 (2013.01); G02F 1/2257 (2013.01)] | 10 Claims |
1. A method for manufacturing an optical modulator,
the optical modulator including a Mach-Zehnder modulator,
the Mach-Zehnder modulator including an electrode and an arm waveguide,
the electrode being disposed on the arm waveguide,
the method comprising:
a step of preparing the Mach-Zehnder modulator;
a step of calculating a light transmittance in the arm waveguide based on a change amount of absorption loss of light propagating through the arm waveguide, an initial phase shift, and a phase change amount of the light propagating through the arm waveguide;
a step of acquiring, based on the light transmittance in the arm waveguide, a relationship between a voltage applied to the electrode and the phase change amount of the light propagating through the arm waveguide;
a step of acquiring, based on the relationship, a voltage in which the phase change amount of the light propagating through the arm waveguide has a predetermined amount when the light is modulated; and
a step of storing the voltage acquired in the step of acquiring in a storage unit.
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