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Low GDD Ultrafast Mirrors for 1400 nm - 1700 nm
UM10-45C in an H45
Thorlabs' Low Group Delay Dispersion (GDD) Mirrors incorporate a coating offering high reflectance in the 1400 nm - 1700 nm wavelength range and are meant to be used at a 45° angle of incidence. These ultrafast mirrors are designed for use with erbium lasers (1530 - 1620 nm); however, the operating wavelength range also covers many of the major telecom bands, including E (1360 - 1460 nm), S (1460 - 1530 nm), C (1530 - 1565 nm), L (1565 - 1625 nm), and U (1625 - 1675 nm). These mirrors are ideal for applications where pulse broadening is a concern. They offer an ideal combination of greater than 99% reflectance and less than |30 fs2| GDD; for details, please see the Graphs tab.
These low GDD mirrors are available with either a 1/2" or 1.00" 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 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 femtosecond and picosecond laser pulses. Please see below for more information.