Title:
SEMICONDUCTOR LASER AND LIGHT TRANSMITTER
Document Type and Number:
WIPO Patent Application WO/2022/264202
Kind Code:
A1
Abstract:
An objective of the present invention is to suppress a decrease in laser output due to optical axis misalignment between a laser unit waveguide and an EA unit waveguide in a semiconductor laser. The configuration of the present invention has a structure in which a spot size converter is integrated between a laser and EA of an EADFB laser by a passive waveguide. The spot size converter is characterized by having an expanded taper/linear waveguide/reduced taper configuration, and the tapers have the same aspect ratio. Furthermore, as this spot size converter is provided between the EA and a semiconductor optical amplifier (SOA), application to a semiconductor optical amplifier assisted extended reach EA-DFB laser (AXEL) is possible.
Inventors:
CHIN MEISHIN (JP)
SHINDO TAKAHIKO (JP)
KANAZAWA SHIGERU (JP)
SHINDO TAKAHIKO (JP)
KANAZAWA SHIGERU (JP)
Application Number:
PCT/JP2021/022486
Publication Date:
December 22, 2022
Filing Date:
June 14, 2021
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H01S5/026
Domestic Patent References:
| WO2018079112A1 | 2018-05-03 |
Foreign References:
| US20170179679A1 | 2017-06-22 | |||
| US6246709B1 | 2001-06-12 | |||
| JP2017069494A | 2017-04-06 |
Attorney, Agent or Firm:
TANI & ABE, P.C. (JP)
Download PDF: