Patent · US Expired

Single frequency laser

US7087448B2 · kind B2 · utility

0Cited by

2References

19Claims

0Family size

Assignee

University of Ireland, Cork · IE

Inventor

Brian Corbett · Cork, IE

Key dates

Filing date	Oct 11, 2001
Grant date	Aug 8, 2006
Priority date	—
Expiry date	Feb 2, 2022

Classification

Technology area (CPC H)Electricity
CPC primaryH01S5/4087
WIPO fieldOptics
WIPO sectorInstruments

Abstract

This invention relates to generally to semiconductor devices, for example lasers and more particularly to single frequency lasers and is directed at overcoming problems associated with the manufacture of these devices. In particular, a laser device is provided formed on a substrate having a plurality of layers (1,2,3,4,5), the laser device comprising at least one waveguide (for example a ridge) established by the selective removal of sections of at least one of the layers. The ridge (100;101) has at least one defect defining region (104), the at least one defect defining region of the ridge defining a defect in the ridge. The width of the ridge is greater in the at least one defect defining region of the ridge than in adjacent sections of the ridge.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.