The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 08, 2020
Filed:
Dec. 07, 2017
Lumentum Japan, Inc., Sagamihara, Kanagawa, JP;
Atsushi Nakamura, Nagano, JP;
Shunya Yamauchi, Kanagawa, JP;
Yoriyoshi Yamaguchi, Kanagawa, JP;
Nozomu Yasuhara, Kanagawa, JP;
Yoshihiro Nakai, Kanagawa, JP;
Hideaki Asakura, Kanagawa, JP;
Noriko Sasada, Kanagawa, JP;
Takayoshi Fukui, Kanagawa, JP;
Hiroki Irie, Kanagawa, JP;
Lumentum Japan, Inc., Kanagawa, JP;
Abstract
Provided is an optical transmission module which can generate PAM4 optical modulation signals without converting a plurality of binary electric signals to a multi-level electric signal. An optical transmission module () comprising: a light source () for emitting continuous waveform (CW) light; optical modulators () arranged in series with a path of the CW light configured to modulate the CW light by switching relatively large absorption and relatively small absorption of the optical modulators in response to a modulation signal applied to the respective optical modulators; and an arithmetic logic circuit () configured to receive a plurality of binary electrical signals, and then to perform logic operation on the plurality of binary electrical signals for generating a new plurality of binary electrical signals, wherein each of the new plurality of binary electrical signals is applied to the respective optical modulators as the modulation signal.