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:
May. 28, 2019
Filed:
Nov. 07, 2017
Oclaro Japan, Inc., Sagamihara, Kanagawa, JP;
Kouji Nakahara, Tokyo, JP;
Hiroaki Inoue, Saitama, JP;
Oclaro Japan, Inc., Kanagawa, JP;
Abstract
In an optical transmitter module for combining three or more optical signals different in intensity with an optical multiplexer to generate a PAM signal, the influence of the beat noise and the chromatic dispersion due to the difference in wavelength is reduced. The optical transmitter module includes first through third optical signal sources adapted to output respective optical signals binary intensity modulated with different amplitude from each other, and a combining section. The combining section has a wavelength multiplexer adapted to wavelength-multiplex a plurality of input optical signals having different wavelengths from each other while keeping the respective polarization states, and a polarization multiplexer adapted to polarization-multiplex a pair of input optical signals having respective polarization states perpendicular to each other, and the combining section combines the input optical signals from the first through third optical signal sources with each other to generate a PAM8 signal.