Reflective opitical feedback element
US5075794A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 15, 1990 |
| Grant date | Dec 24, 1991 |
| Priority date | — |
| Expiry date | Nov 15, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/6933
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A device for providing an optical feedback path for a receiver comprises a header including a base having a major surface and first, second and third leads. The first and second leads extend through the base to form first and second posts on the major surface of the base and the third lead is electrically connected to the base. The portion of the first and second leads extending through the base are surrounded by electrical insulation so that the first and second leads are electrically insulated from the base. A submount comprising a flat insulating block with a layer of gold on its top and bottom surfaces is solder-bonded to the major surface of the base and the gold layer on the top surface of the submount is wire-bonded to the base. An LED is solder-bonded to the top surface of the submount and wire-bonded to the first post on the major surface of the base, the LED emitting optical radiation when it is forward biased. A P-I-N diode is also solder-bonded to the top surface submount and wire-bonded to the second post on the major surface of the base of the header. The P-I-N diode detects the optical radiation emitted by the LED. In order to insure that the light emitted by the LED…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.