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1. (WO2018180537) OPTICAL TRANSMITTER AND OPTICAL TRANSMISSION METHOD

Pub. No.:    WO/2018/180537    International Application No.:    PCT/JP2018/010183
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Fri Mar 16 00:59:59 CET 2018
IPC: H04B 10/077
G02F 1/01
H04B 10/516
H04B 10/58
Applicants: NEC CORPORATION
日本電気株式会社
Inventors: KOMATSU Hirokazu
小松 弘和
Title: OPTICAL TRANSMITTER AND OPTICAL TRANSMISSION METHOD
Abstract:
[Problem] To clarify the characteristics of an optical modulator having output asymmetry due to a non-linear effect. [Solution] An optical transmitter provided with: a light source which outputs light of a predetermined wavelength; a modulator which modulates the light output from the light source using a modulation signal; a modulator drive unit which outputs a modulation signal to the modulator; a control unit which outputs a low-frequency signal to the modulator and a modulator drive means, amplitude-modulates the modulation signal using the low-frequency signal, intensity-modulates the amplitude-modulated modulation signal using the low-frequency signal, and receives a monitor signal including a low-frequency signal component; and a detection unit which extracts a low-frequency component of an optical signal output from the modulator, and outputs the low-frequency component as a monitor signal.