Various custom wavelengths, GDD values, and mirror sizes are available, please contact us for more information. Or you can find our stocklist of chirped mirror pairs here.
The Chirped Mirror Pair is a mirror set consisting of two matched complementary chirped mirrors. Chirped mirror pairs are designed to provide a precise and simple approach for dispersion compensation in ultrafast laser and femtosecond laser applications. Each of these chirped mirrors is engineered with a coating of a non-uniform layer structure, creating a special dispersive mirror that introduces a wavelength-dependent phase shift. The chirped mirror pair is proposed to introduce a negative Group Delay Dispersion (GDD) for ultrafast pulses that offset the positive GDD resulting from the transmission in the optical media, ensuring efficient dispersion compensation and preservation of the pulse's peak power.
Hangzhou Shalom EO offers Custom and Off-the-shelf Ultrafast Chirped Mirror Pairs. Our chirped mirror pairs feature high reflectance and negative group delay dispersion (GDD) oriented to compensate for dispersion in ultrafast lasers or for femtosecond laser pulses with minimal loss or deviation from the desired pulse characteristics. Various custom wavelengths, GDD values, and mirror sizes are available. Our chirped mirror pairs also exhibit very low third-order dispersion, minimizing higher-order phase shifts that can distort the pulse shape.
Curves:
As shown below, the blue curve is the GDD of one of the chirped mirrors from the chirped pair mirror pair, and the orange curve is the GDD of another mirror in the mirror pair, instead of the ideal constant GDD, we can observe substantial oscillation in the dispersion value against wavelengths (and the oscillation in GDD is periodical about the spectrum).
In contrast, the green curve shows the net GDD of the chirped mirror pair, which is the combination of two curves, as the oscillations in the two mirrors compensate each other, the net GDD of the matched chirped mirror pair becomes far less turbulent.
