Laser Development: from ultra-intense to ultra-stable
|TW-peak power parametric ultrafast amplification
have developed TW-class optical parametric amplifier systems over the
years for different purposes, such as high-harmonic generation of
X-rays and for phase-coherent amplification of ultrafast pulses for
frequency comb metrology. The shortest pulses we have produced at
few-TW level are 7.6 fs (up to 3 TW at a 30 Hz repetition rate).
Currently the development focuses on two aspects. One is two-pulse amplification for
Ramsey-frequency comb spectroscopy. The other is production of
10 fs, TW-level pulses at 300 Hz repetition rate for water-window (2-4
nm) X-ray generation. We recently finished the pump laser for this system, and published an article in Optics Letters about it:
D.W.E. Noom, S. Witte, J. Morgenweg, R. Altmann, K.S.E. Eikema
High-energy, high repetition rate picosecond pulses from a QCW-diode pumped Nd:YAG system
Optics Letters 38, 3021-3023 (2013)
S. Witte, K.S.E. Eikema, "Ultrafast Optical Parametric Chirped-Pulse Amplification"
Invited, IEEE Journal of Selected Topics in Quantum Electronics 18, 296-307 (2012)
D.Z. Kandula, A. Renault, Ch. Gohle, A.L. Wolf, S. Witte, W.
Hogervorst, W. Ubachs, K.S.E. Eikema, "Ultrafast double-pulse
parametric amplification for precision Ramsey metrology"
Opt. Express 16, 7071-7082 (2008)
A. Renault, D.Z. Kandula, S. Witte, A.L. Wolf, R. Th. Zinkstok, W.
Hogervorst, K.S.E. Eikema, "Phase stability of teraWatt-class
ultrabroadband parametric amplification"
Opt. Lett. 32, 2363-2365 (2007)
S. Witte,R. Th. Zinkstok, W. Hogervorst, K.S.E. Eikema,
"Numerical simulations for performance optimization of a few-cycle terawatt NOPCPA system"
Appl. Phys. B. 87, 677-684 (2007)
S. Witte, R. Th. Zinkstok, A.L. Wolf, W. Hogervorst, W. Ubachs, K.S.E.
Eikema, "A source of 2 terawatt, 2.7 cycle laser pulses based on
noncollinear optical parametric chirped amplification"
Opt. Express 14, 8168-8177 (2006)
are developing ultra-stable lasers for applications such as frequency
and time-transfer over fiber networks at wavelengths near 1550 nm based
on diode lasers.
Recently we acquired a <1Hz bandwidth laser system operating at 1542
nm from Menlo Systems (see photo). The system is financed by a FOM
Program "Broken Mirrors and Drifting Constants", and together with a Cs
III atomic clock from Symmetricom it will provide a reference system to
improve many experiments that require high accuracy.
Currently a temperature stabilized 'quiet room' is constructed where
the sub-Hz laser will be installed, together with the Cs atomic clock,
and a frequency comb.
|Fiber-link LaserLaB - KVI Groningen
We are working on a fiber link between the LaserLaB and the KVI in
Groningen. The project is sponsored by Surfnet, and coordinated by dr.
J. Koelemeij. Since spring 2012 we have a bi-directional link in
operation on a commercial channel. The idea is to transfer frequency
and time signals over the link with a better precision than GPS
currently allows. In the future we hope to have access to a
'dark-fiber' for fully length-compensated operation of the link for the
highest performance. We are also actively pursuing future participation
in a European time and frequency dissemination network.
We gratefully acknowledge financial support from:
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