APC. Prism-Based Dispersion Control Unit for Femtosecond Lasers
• GVD at 800 nm from +16500 fs2 to -13800 fs2
• Broad GVD tuning range
• Model with flexible distance between prisms
• Ideal for multiphoton microscopy and spectroscopy
Product overview
Prism dispersion compensator provides extensive control over the duration of femtosecond optical pulses by introducing user-defined amount of second-order group velocity dispersion (GVD) into the optical scheme. It can compensate the pulse widening caused by positive GVD of transmissive elements of the optical setup such as lenses and objectives that is critically important for multiphoton femtosecond microscopy.
Propagation through any medium (including transparent ones) can influence the temporal properties of ultrashort laser pulses due to difference in the refraction index for different wavelengths, or dispersion. The dispersion makes different parts of a broadband spectrum of femtosecond laser pulses propagate with different velocities and separates them temporally from each other. For example, the second-order dispersion of glass in a microscope objective can stretch a 30-fs transform-limited laser pulse to 150 and even 300 fs. This stretching is unacceptable for scientific purposes since it results in decrease of intensity and temporal resolution. Fortunately, there are several ways to compensate the influence of the material dispersion introduced by transmissive optical elements. The most versatile and simple approach is to use a prism dispersion compensator which introduces the same amount of group velocity dispersion (GVD) but with an opposite sign (i.e. negative GVD) to the optical scheme.
APC Kit FS
APC Kit DF
APC Pro FS
APC Pro DF
Prism material
fused silica
dense flint
fused silica
dense flint
Wavelength
700-900* nm
GVD range of dispersion compensator at 800 nm
user-defined, tuning range width 13000 fs2
user-defined, tuning range width 30000 fs2
from +6900 fs2 to -1630 fs2 **
from +16500 fs2
to -13800 fs2
Transmission
>90% @800 nm
Polarization
linear, horizontal***
Beam diameter
up to 4 mm
Dimensions
two units, 165*180*129 mm each
410*324*186 mm
* - other wavelength ranges are available upon request;
** - tuning range can be shifted to (+5700 fs2 to -2830 fs2) upon request;
*** - vertical polarization upon request.
商品属性 [波长] 700-900 nm