Optical signal generating apparatus and optical power meter calibrating system using the same
US4927266A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1988 |
| Grant date | May 22, 1990 |
| Priority date | — |
| Expiry date | Nov 29, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J1/42
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In an optical signal generating apparatus of this invention, output light from a light source driven by a light source driver is externally output from an optical receptacle through a variable optical attenuator. An output monitor unit can be detachably connected to the optical receptacle through an optical connector. When an absolute level of the output light is to be set, a CPU compares a set value from an output level setting unit with an output value from the output monitor unit and controls the variable optical attenuator and the light source driver so that a comparison error becomes zero. The CPU maintains the above control of the variable optical adjuster and the light source driver so that the light is output to be the desired level set by the output level setting unit even after the output monitor unit is disconnected from the optical receptacle including the timing at which the comparison error becomes zero. An optical power meter calibrating system of this invention includes the above optical signal generating apparatus as a stabilized light source. In the optical power meter calibrating system, in place of the output monitor unit, a standard optical power meter and an o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.