Ultrafast double-pulse parametric amplification for precision Ramsey metrology.
We demonstrate phase stable, mJ-level parametric amplification of pulse pairs originating from a Ti:Sapphire frequency comb laser. The amplifier-induced phase shift between the pulses has been determined interferometrically with an accuracy of approximately 10 mrad. Typical phase shifts are on the order of 50-200 mrad, depending on the operating conditions. The measured phase-relation can be as stable as 20 mrad rms (1/300(th) of an optical cycle). This makes the system suitable for Ramsey spectroscopy at short wavelengths by employing harmonic upconversion of the double-pulses in nonlinear media.
Atomic, Molecular, and Laser Physics Group, Laser Centre Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands. kjeld@nat.vu.nl
D Z
DZ
Kandula
A
A
Renault
Ch
Ch
Gohle
A L
AL
Wolf
S
S
Witte
W
W
Hogervorst
W
W
Ubachs
K S E
KS
Eikema
D000537:Aluminum Oxide / Q000737:chemistry*; D004867:Equipment Design; D007834:Lasers; D015233:Models, Statistical; D009991:Oscillometry / Q000295:instrumentation / Q000379:methods; D010777:Photochemistry / Q000379:methods; D015203:Reproducibility of Results; D013053:Spectrophotometry / Q000379:methods; D013997:Time Factors; D014025:Titanium / Q000737:chemistry*
D014025:Titanium; D000537:Aluminum Oxide