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Low GDD Ultrafast Mirrors for 970 nm - 1150 nm
UM10-45B Low GDD Mirror
Thorlabs' Low Group Delay Dispersion (GDD) Mirrors feature a coating designed for high reflectance in the 970 nm - 1150 nm range. The wavelength range is optimized for Ytterbium (Yb) and Neodymium (Nd) lasers. These mirrors are ideal for applications where pulse broadening is a concern and are designed for a 45° angle of incidence. The dielectric coating is applied with an ion-beam-sputtering (IBS) technique, providing a highly controlled and durable dielectric thin film coating. This coating has a high damage threshold and has been used with lasers delivering 40 J/cm2 (p-polarization, 1064 nm with a 10 ns pulse at 100 Hz).
These mirrors offer an ideal combination of greater than 99% reflectance and less than 30 fs2 GDD. For details, please see the Graphs tab.
Our low GDD mirrors are available with either a 1/2" or 1" diameter. The edge of each optic is engraved with the item number and an arrowhead pointing to the coated surface. The back surface of these mirrors is polished so that the small percentage of light that leaks through the reflective coating may be used for applications such as power monitoring.
In addition to the low GDD mirrors here, Thorlabs also offers Low GDD Mirrors for various other wavelength ranges. For mirrors designed for the second harmonic of Nd:YAG lasers, see our Low GDD Ultrafast Mirrors for 460 - 590 nm. For our full selection of optics for ultrafast applications, please see the Ultrafast Optics tab.
The graphs below are theoretical results of the reflectance and the group delay dispersion and represent the designed coating performance. Both plots are shown for an AOI of 45°.
Click to Enlarge
Click for Raw Data
The shaded region represents the specified wavelength range where RS>99%.
Thorlabs offers a wide selection of optics optimized for use with Nd:YAG lasers. Please see below for more information.
Thorlabs offers a wide selection of optics optimized for use with femtosecond and picosecond laser pulses. Please see below for more information.