NANEO | CHORD is the GVD Mirror to compensate the usually Group Delay Dispersion of all components in the light path of an ultrashortpulse laser cavity by by accordingl negative values. Under these conditions one gets transform limited short pulses according to the laserｴs bandwidth.

Compared to other methods of GVD compensation, the use of NANEO | CHORD mirrors results in a compact and robust design for ultrashortpulse lasers with a minimum of optical components in the light path.

It also helps preserving the pulse shape when used as an extracavity beamsteering device.

Wavelengths
600 - 1200 nm (typ.)

Diameters up to 1.5 inches, custom size

Reflectivity:

HR up to 99,98 %

GDD 0 fs2, -50 fs2 (typ.)

custom 2nd / 3rd order

Damage Threshold:
40 J/m2 @ 5 ns
according to ISO 11254, Part1

GDD from zero to over 1000 fs2, depending on the covered wavelength range

Flexibility by adding an HT pump window or a PR range with specified reflectivity to obtain an output coupler

Diagrams above:

Both:

Comparison of designed and fabricated properties of a matched GVD mirror pair made for the research group around F.X. K芬rtner at MIT/RLE where they were used in a Ti:Saphire laser generating light pulses of 5 fs length (Optics Letters 26, 2001, No. 6, pp. 373 - 75)