Long wavelength vertical cavity surface emitting laser with photodetector for automatic power control and method of fabrication
US5943357A · kind A · utility
43Cited by
5References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1997 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Aug 18, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/34306
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A long wavelength VCSEL with a photodetector, wherein the VCSEL includes a first and second stack of DBRs disposed on a first surface of a first substrate element, having an active region sandwiched therebetween, and a PIN photodetector including a first doped region disposed on a second substrate element, a undoped region disposed on the first doped region, and a second doped region disposed on the undoped region. The PIN photodetector is mounted to an opposed surface of the first substrate element, thereby monitoring a back VCSEL emission. The device is fabricated to allow for automatic power control (APC) of the VCSEL.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.