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Group Velocity Dispersion

Mira Family

Mira Family

…Lens Modelocking) technique. This extremely simple, all-solid-state approach is analogous to modelocking by a fast saturable absorber. Group Velocity Dispersion (GVD) in the Mira Optima 900-F (the femtosecond cavity version of the Mira) is compensated by a simple 2-prism sequence in the cavity. Easy…

Mira brochure

Mira brochure

…flexible configurations. These include:
Mira Optima 900-F.
The Mira Optima 900-F operates in femtosecond
mode, with GVD (Group Velocity Dispersion) compensation achieved via an elegant, double-pass,
two-prism sequence at the rear of the cavity.
Mira Optima 900-P.
The…

Pulse Compressors

Pulse Compressors

…This Product Close PRICE HERE Pulse Compression Accessory for Femtosecond Oscillators Adding GVD (Group Velocity Dispersion), Pulse Compressors also allow users to precompensate for the dispersion introduced with downstream optics in order to shorten the pulsewidth at the sample. We offer two types…

COHR WP PropagationDispersionMeasurement of sub 10fsPulses 08 29 18.pdf

COHR WP PropagationDispersionMeasurement of sub 10fsPulses 08 29 18.pdf


Group Delay, Group Velocity and Group Velocity Dispersion
Let's start with the Taylor expansion of the k vector to look at the different contributing factors:
() =
+

( -
) +

( -
) +

( -
) +

( -
) +
Group Velocity
The group velocity is…

COHR WP ChameleonPeakPower 2018-08.pdf

COHR WP ChameleonPeakPower 2018-08.pdf

…much higher
at shorter wavelengths, than at wavelengths beyond 1000 nm. The total GDD of a system is the
product of GVD (Group Velocity dispersion) with the length of the material. See Figure 3 for typical
GVD data. Note the high effect from TeO2, the most common material used…

2016-Ultrafast-Laser-Systems-Catalog.pdf

2016-Ultrafast-Laser-Systems-Catalog.pdf

…and Vitesse oscillators enabling operation very close to the transform limit.
By adding Group Velocity Dispersion (GVD), pulse
compressors also allow users to pre-compensate for
the dispersion introduced when downstream optics
are added in order to shorten the pulse width at the…

COHR RLScatalog 2017revA web.pdf

COHR RLScatalog 2017revA web.pdf

…Chameleon oscillators enabling
operation very close to the transform limit.
By adding Group Velocity Dispersion (GVD), pulse
compressors also allow users to pre-compensate for
the dispersion introduced when downstream optics
are added in order to shorten the pulse width at…

Femtosecond lasers for life science.pdf

Femtosecond lasers for life science.pdf

…models are offered with
up to 3.5W average power and 400 nm
tuning range.
Chameleon Vision
Chameleon Vision adds group velocity
dispersion (GVD) precompensation to
the Chameleon Ultra platform, ensuring short pulses are delivered right to
the sample plane. Multiple…

Bio Photonics - October 2014

Bio Photonics - October 2014

…that group velocity dispersion in the beam
delivery optics will stretch the initial
laser pulse width. For this reason, the new
laser incorporates a software-controlled
precompensator to enable the user or
system builder to offset downstream
group velocity dispersion

Bio Photonics - May / June 2015

Bio Photonics - May / June 2015

…acousto-optic
modulators (AOMs), can cause undesirable stretching of the pulse through the
material. This is known as positive group
velocity dispersion (GVD).
"So the laser pulses are often prechirped with negative GVD before they
leave the laser head, in order to offset…

Europhotonics - Autumn 2017

Europhotonics - Autumn 2017

…coatings
in both the OPO and the group velocity
dispersion [GVD] precompensator," said
Darryl McCoy, Coherent's director of
product marketing.
Specifically, these had to be carefully
optimized to provide dispersion management, to deliver this over an unprecedented…

Bio Photonics - February / March 2015

Bio Photonics - February / March 2015

…because shorter pulse widths
are believed to render brighter images,
this new laser includes an internal and
fully automated group velocity dispersion
precompensator, enabling the shortest
possible pulse width at the sample. This
high-power combination is suitable for…