Patent · US Expired

Injection controlled laser transmitter with twin local oscillators

US4655588A · kind A · utility

8Cited by
2References
6Claims
0Family size

Assignee

Inventors

Key dates

Filing dateFeb 25, 1985
Grant dateApr 7, 1987
Priority date—
Expiry dateFeb 25, 2005

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH01S3/083
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

A heterodyne CO.sub.2 optical Doppler radar comprising a ring type of traitter laser and twin local oscillator lasers which are automatically controlled to operate at a difference frequency equal to the intermediate frequency of the radar, which may be in the VHF band. The output of one of the twin lasers is injected into the transmitter laser for stabilization purposes and the output of the other of the twin lasers is heterodyned with the received target return signals to form the radar's intermediate frequency signal.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.