Patent ID: 11868021
Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
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.