Title:
TUNABLE LASER
Document Type and Number:
WIPO Patent Application WO/2020/158431
Kind Code:
A1
Abstract:
Provided is a tunable laser with which emission wavelength can be controlled at high speed and that at the same time prevents degradation in the fundamental laser properties. The tunable laser comprises: a semiconductor gain section 20 composed of a III–V compound semiconductor; an optical feedback section 30 that diffracts light generated in the semiconductor gain section 20 and feeds the diffracted light back to the semiconductor gain section 20; and an optical modulation section 10 that includes an optical waveguide 25 containing indirect-bandgap doped silicon. The semiconductor gain section 20 and the optical modulation section 10 are disposed so that the transverse modes overlap, and the semiconductor gain section 20 is constituted by a buried active-layer thin film of the lateral current injection type.
Inventors:
AIHARA TAKUMA (JP)
MATSUO SHINJI (JP)
KAKITSUKA TAKAAKI (JP)
TSUCHIZAWA TAI (JP)
HIRAKI TATSURO (JP)
MATSUO SHINJI (JP)
KAKITSUKA TAKAAKI (JP)
TSUCHIZAWA TAI (JP)
HIRAKI TATSURO (JP)
Application Number:
PCT/JP2020/001400
Publication Date:
August 06, 2020
Filing Date:
January 17, 2020
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H01S5/026; G02F1/025; H01S5/0687; H01S5/11
Foreign References:
| JP2019003973A | 2019-01-10 | |||
| JP2018046258A | 2018-03-22 | |||
| US20160094014A1 | 2016-03-31 |
Attorney, Agent or Firm:
MIYOSHI Hidekazu et al. (JP)
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