Optical semiconductor device and method of controlling the same
US7894693B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 4, 2008 |
| Grant date | Feb 22, 2011 |
| Priority date | — |
| Expiry date | Mar 26, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/125
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical semiconductor device includes a waveguide having one or more first segments having a region that includes a diffractive grating and another region combined to the region, one or more second segments having a region that includes a diffractive grating and another region combined to the region and a plurality of third segments having a region the includes a diffractive grating and another region combined to the region, a length of the second segment being different from that of the first segment, a length of the third segment being shown as L3=L1+(L2−L1)×K1 in which 0.3≦K1≦0.7, L1 is a length of the first segment, L2 is a length of the second segment and L3 is a length of the third segment; and a refractive index control portion controlling refractive index of the first segment through the third segments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.