Title :
Heterodyne frequency measurements of a voltage-controlled diode laser
Author :
Ludvigsen, Hanne ; Holmlund, Christer ; Ikonen, Erkki
Author_Institution :
Metrol. Res. Inst., Helsinki Univ. of Technol., Espoo, Finland
fDate :
4/1/1993 12:00:00 AM
Abstract :
A single-mode GaAlAs diode laser is frequency stabilized by keeping the injection current and the voltage across the laser constant. The stability of the laser is studied by heterodyning it with another laser locked to the center of a hyperfine transition of the D 2-line of 85Rb. Alternatively, the frequency stability is observed by tuning the voltage-controlled diode laser to the center of an absorption line of rubidium vapor and recording changes in the absorption signal. In both cases a long-term frequency stability of 4×10-8 is observed
Keywords :
atomic hyperfine structure; frequency measurement; laser tuning; laser variables measurement; rubidium; semiconductor lasers; 85Rb; D2-line; GaAlAs diode laser; absorption line; heterodyne frequency measurement; hyperfine transition; injection current; laser frequency stability; tuning; voltage-controlled diode laser; Absorption; Diode lasers; Frequency measurement; Laser feedback; Laser stability; Laser transitions; Laser tuning; Semiconductor lasers; Temperature sensors; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
