Title:
DML DRIVER
Document Type and Number:
WIPO Patent Application WO/2020/195886
Kind Code:
A1
Abstract:
Provided is a directly modulated laser (DML) driver capable of improving the band of electrical-to-optical (EO) response characteristics, while suppressing a group delay at or around a relaxation oscillation frequency of a laser diode (LD). The DML driver is composed of a post driver 2 which supplies a drive current to an LD 1, and a pre-driver 3 which drives the post driver 2 in accordance with a modulation signal. The pre-driver 3 is composed of a transistor M1, a peaking inductor L1, a peaking inductor L2, an inductor Lx for suppressing group delay, and a peaking capacitor Cx.
Inventors:
KISHI TOSHIKI (JP)
NAGATANI MUNEHIKO (JP)
NOSAKA HIDEYUKI (JP)
NAGATANI MUNEHIKO (JP)
NOSAKA HIDEYUKI (JP)
Application Number:
PCT/JP2020/010768
Publication Date:
October 01, 2020
Filing Date:
March 12, 2020
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H01S5/062; H03F1/48; H03F3/68; H04B10/516
Domestic Patent References:
| WO2008019318A2 | 2008-02-14 |
Foreign References:
| JP2018206954A | 2018-12-27 | |||
| JP2017191812A | 2017-10-19 | |||
| JP2016096221A | 2016-05-26 | |||
| JP2013106010A | 2013-05-30 | |||
| US20100092184A1 | 2010-04-15 |
Attorney, Agent or Firm:
YAMAKAWA, Shigeki et al. (JP)
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