Driving circuit for analog-modulated diode-laser
US8971364B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2011 |
| Grant date | Mar 3, 2015 |
| Priority date | — |
| Expiry date | Dec 4, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/06812
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A diode-laser is driven by a modulated voltage through a voltage-to-current converter. The modulated voltage has a fixed level determined by an applied fixed bias voltage and a variable level determined by a modulation voltage signal varying between minimum and maximum values. The fixed voltage level corresponds to a threshold level above which the diode-laser would provide laser-output. The modulation voltage signal is monitored and compared with a predetermined set value. If the monitored voltage signal falls below the set value, the modulated voltage is disconnected from the voltage-to-current converter and the output of the diode-laser falls to zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.