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Ultrafast double-pulse parametric amplification for precision Ramsey metrology.

D Z Kandula¹, A Renault, Ch Gohle

¹Atomic, Molecular, and Laser Physics Group, Laser Centre Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands. kjeld@nat.vu.nl

|June 12, 2008

Summary

We achieved phase-stable, millijoule-level parametric amplification of laser pulse pairs. This technique enables precise phase control for advanced spectroscopy applications.

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Area of Science:

Quantum optics
Laser physics
Spectroscopy

Background:

Ti:Sapphire lasers are crucial for generating ultrashort pulses.
Parametric amplification enhances pulse energy.
Precise control over pulse-to-pulse phase is vital for advanced spectroscopic techniques.

Purpose of the Study:

To demonstrate phase-stable, millijoule-level parametric amplification of pulse pairs.
To accurately measure and control the amplifier-induced phase shift.
To assess the system's suitability for Ramsey spectroscopy.

Main Methods:

Utilizing a Ti:Sapphire frequency comb laser as the source.
Employing parametric amplification to increase pulse energy.
Interferometric measurement of the phase shift between amplified pulse pairs.

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Main Results:

Achieved phase-stable, millijoule-level parametric amplification.
Measured amplifier-induced phase shifts with 10 mrad accuracy.
Demonstrated phase stability as high as 20 mrad rms (1/300th of an optical cycle).

Conclusions:

The developed system offers precise phase control for amplified pulse pairs.
The high phase stability makes it suitable for Ramsey spectroscopy.
Harmonic upconversion in nonlinear media can be used for short-wavelength applications.