Title :
Pump-probe spectroscopy in potassium using an AlGaAs laser and the second-harmonic generation of an InGaAsP laser for frequency stabilization and linking
Author :
Wang, W. ; Akulshin, A.M. ; Ohtsu, M.
Author_Institution :
Interdisciplinary Graduate Sch. of Sci. & Eng., Tokyo Inst. of Technol., Japan
Abstract :
Pump-probe spectroscopy in /sup 41/K by using a grating-feedback 0.77-μm AlGaAs laser and the second-harmonic wave of a 1.54-μm InGaAsP laser for providing a frequency reference in the 1.5 μm region was performed. The pump laser frequency was locked to the Doppler-free resonance with frequency fluctuations less than 50 kHz estimated from the error signal. The Doppler-free absorption spectra in both co- and counter-propagating schemes were obtained, and the feasibility of simultaneous frequency stabilization and linking for two diode lasers with a frequency difference as large as 200 THz was demonstrated.
Keywords :
infrared spectra of atoms; infrared spectroscopy; laser frequency stability; measurement by laser beam; optical pumping; potassium; /sup 41/K; 0.77 mum; 1.5 mum; 1.54 mum; 200 THz; 50 kHz; AlGaAs; AlGaAs laser; Doppler-free absorption spectra; Doppler-free resonance; InGaAsP; InGaAsP laser; K; co-propagating schemes; counter-propagating schemes; diode lasers; error signal; frequency difference; frequency fluctuations; frequency reference; grating-feedback; laser frequency stabilization; laser linking; pump laser frequency; pump-probe spectroscopy; second-harmonic generation; simultaneous frequency stabilization; Absorption; Fluctuations; Frequency estimation; Gratings; Joining processes; Laser excitation; Pump lasers; Resonance; Resonant frequency; Spectroscopy;
Journal_Title :
Photonics Technology Letters, IEEE
