Stabilization and time resolved measurement of the frequency evolution of a modulated diode laser for chirped pulse generation

K. Varga-Umbrich, J. Bakos, G. Djotyan, P. N. Ignácz, B. Ráczkevi, Zs Sörlei, J. Szigeti, M. Kedves

Research output: Contribution to journalArticle

Abstract

We have developed experimental methods for the generation of chirped laser pulses of controlled frequency evolution in the nanosecond pulse length range for coherent atomic interaction studies. The pulses are sliced from the radiation of a cw external cavity diode laser while its drive current, and consequently its frequency, are sinusoidally modulated. By the proper choice of the modulation parameters, as well as of the timing of pulse slicing, we can produce a wide variety of frequency sweep ranges during the pulse. In order to obtain the required frequency chirp, we need to stabilize the center frequency of the modulated laser and to measure the resulting frequency evolution with appropriate temporal resolution. These tasks have been solved by creating a beat signal with a reference laser locked to an atomic transition frequency. The beat signal is then analyzed, as well as its spectral sideband peaks are fed back to the electronics of the frequency stabilization of the modulated laser. This method is simple and it has the possibility for high speed frequency sweep with narrow linewidth that is appropriate, for example, for selective manipulation of atomic states in a magneto-optical trap.

Original languageEnglish
Article number055006
JournalLaser Physics
Volume26
Issue number5
DOIs
Publication statusPublished - May 1 2016

Fingerprint

Time measurement
Semiconductor lasers
Stabilization
stabilization
semiconductor lasers
time measurement
Lasers
pulses
sweep frequency
Linewidth
Laser pulses
Electronic equipment
lasers
Modulation
synchronism
Radiation
atomic interactions
slicing
chirp
temporal resolution

Keywords

  • chirped pulse
  • external cavity diode laser
  • frequency sidebands locking
  • laser stabilization
  • modulated frequency

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Industrial and Manufacturing Engineering

Cite this

Stabilization and time resolved measurement of the frequency evolution of a modulated diode laser for chirped pulse generation. / Varga-Umbrich, K.; Bakos, J.; Djotyan, G.; Ignácz, P. N.; Ráczkevi, B.; Sörlei, Zs; Szigeti, J.; Kedves, M.

In: Laser Physics, Vol. 26, No. 5, 055006, 01.05.2016.

Research output: Contribution to journalArticle

Varga-Umbrich, K. ; Bakos, J. ; Djotyan, G. ; Ignácz, P. N. ; Ráczkevi, B. ; Sörlei, Zs ; Szigeti, J. ; Kedves, M. / Stabilization and time resolved measurement of the frequency evolution of a modulated diode laser for chirped pulse generation. In: Laser Physics. 2016 ; Vol. 26, No. 5.
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