Hybrid optical pickup with integrated power emission and reading photodetectors
US5136152A · kind A · utility
76Cited by
6References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1990 |
| Grant date | Aug 4, 1992 |
| Priority date | — |
| Expiry date | Dec 19, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/0683
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A compact hybrid laser and photodetector device is disclosed. A heat sink and a metal layer are bonded together, and then mounted on a circuit board. A semiconductor laser chip is mounted on the metal layer. The edge of the metal layer serves as a bonding pad for a wire connection to a bonding pad on the circuit board. A rear-facet photodetector is mounted on the circuit board beneath the semiconductor laser chip. A multiple element photodetector is also mounted on the circuit board for detecting a signal reflected off a media. Preferably, the rear facet and multiple element photodetectors are a single integrated circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.