Title:
OPTICAL TRANSMISSION DEVICE AND OPTICAL TRANSMISSION METHOD
Document Type and Number:
WIPO Patent Application WO/2018/235207
Kind Code:
A1
Abstract:
An optical transmission device (100) comprises: an optical transmitter (200) including an optical modulator (220) and an observation-use optical modulator (230) that attenuate the optical power of input continuous light with an electric field absorption effect and then output the attenuated optical power, the optical modulator (220) performing pulse width modulation on the continuous light and then outputting the modulated light; a bias voltage generation unit (350) that generates a direct-current bias voltage and outputs the bias voltage to the optical modulator (220) and the observation-use optical modulator (230); a modulation signal generation unit (360) that generates an electrical signal for pulse amplitude modulation and outputs the electrical signal to the optical modulator (220); and a bias voltage control unit (340) that instructs the bias voltage generation unit (350) to adjust the direct-current bias voltage on the basis of the optical modulator (220) optical-power absorption amount and the observation-use optical modulator (230) optical-power absorption amount.
Inventors:
SANO HAYATO (JP)
HASEGAWA KIYOTOMO (JP)
SHIRAO MIZUKI (JP)
UENO YUTO (JP)
SATO YOSHIYA (JP)
HASEGAWA KIYOTOMO (JP)
SHIRAO MIZUKI (JP)
UENO YUTO (JP)
SATO YOSHIYA (JP)
Application Number:
PCT/JP2017/022909
Publication Date:
December 27, 2018
Filing Date:
June 21, 2017
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
G02F1/015; H04B10/524
Foreign References:
| JP2011002474A | 2011-01-06 | |||
| JP2000292756A | 2000-10-20 | |||
| JP2003169024A | 2003-06-13 | |||
| JP2017003729A | 2017-01-05 | |||
| US20170155452A1 | 2017-06-01 |
Other References:
KISHI,T. ET AL.: "56-Gb/s Optical Transmission Performance of an InP HBT PAM4 Driver Compensating for Nonlinearity of", JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. 35, no. 1, 1 January 2017 (2017-01-01), pages 75 - 81, XP011641239, DOI: 10.1109/JLT.2016.2624778
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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