Semiconductor device with a laser and a photodetector in a common container
US5799030A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 26, 1996 |
| Grant date | Aug 25, 1998 |
| Priority date | — |
| Expiry date | Jul 26, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/2063
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A laser and photodetector are combined in a common package. This permits the photodetector to monitor the light intensity emitted by the laser. The laser and photodetector can be produced monolithically on a common chip to improve the accuracy of positioning of the various components. The device can be disposed within a common container having a window through which the emitted light passes. The window can be configured to have inside and outside surfaces that selectively reflect a portion of the light back to the photodetector while transmitting the remaining portion of the light through the window to a phototransmissive device, such as an optical fiber. The light reflected back to the photodetector can be focused in a predetermined pattern to cause the light to be accurately received by the photodetector and not fall on the laser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.