OPTICAL DEVICE AND OPTICAL TRANSMITTER
To provide an optical device and the like, improving changes in optical output power and accordingly improving signal quality.SOLUTION: An optical device includes a generator, a light emitter, a modulator, an optical amplifier, a current source, a storage, and a controller. The generator generates a...
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Main Author | |
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Format | Patent |
Language | English Japanese |
Published |
17.01.2024
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Subjects | |
Online Access | Get full text |
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Summary: | To provide an optical device and the like, improving changes in optical output power and accordingly improving signal quality.SOLUTION: An optical device includes a generator, a light emitter, a modulator, an optical amplifier, a current source, a storage, and a controller. The generator generates an electric signal of a multilevel amplitude modulation method. The light emitter emits laser light. The modulator modulates the laser light using the electric signal and outputs an optical signal. The optical amplifier optically amplifies the modulated optical signal according to a drive current. The current source adjusts the drive current to be supplied to the optical amplifier. The storage previously stores input-output characteristics of the optical signal in the optical amplifier relative to drive current value of the drive current. The controller reads out, from the storage, the input-output characteristics corresponding to the drive current value of the drive current supplied to the optical amplifier and controls the electric signal based on the read-out input-output characteristics.SELECTED DRAWING: Figure 1
【課題】光出力パワーの変動を改善して信号品質の向上を図る光デバイス等を提供する。【解決手段】光デバイスは、生成部と、発光部と、変調部と、光増幅部と、電流源と、記憶部と、制御部とを有する。生成部は、多値振幅変調方式の電気信号を生成する。発光部は、レーザ光を発光する。変調部は、電気信号を用いてレーザ光を変調して光信号を出力する。光増幅部は、駆動電流に応じて、変調された光信号を光増幅する。電流源は、光増幅部に供給する駆動電流を調整する。記憶部は、光増幅部における光信号の入出力特性を、駆動電流の駆動電流値毎に予め記憶した。制御部は、光増幅部に供給する駆動電流の駆動電流値に応じた入出力特性を記憶部から読み出し、読み出した入出力特性に基づき、電気信号を制御する。【選択図】図1 |
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Bibliography: | Application Number: JP20220104936 |