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Examples for dispersive UV-VIS-IR coatings

Such optics can be made on base of metal or dielectric coatings covering a spectral range 200-3000 nm. Both options are possible with Helios and Syrus machines. Below one can find four examples of high-quality multilayer mirrors produced with Helios and Syrus. The examples can be considered as a guide for MAP researchers.

 

1) UBCM (ultrabroad chirped mirror)

A complementary pair of 1.5-octave UBCMs for the spectral range 400-1200 nm (picture 1). Such a pair supports sub-3-fs pulses. GDD at 800 nm is -20 fs2, average reflectivity 98 %.

V. Pervak et al. “1.5-octave chirped mirror for pulse compression down to sub-3 fs,” Appl. Phys. B. 87, 5 (2007)

 

A complementary pair of 1.5-octave UBCMs for the spectral range 300-900 nm (picture 2). Such a pair supports sub-3-fs pulses. GDD at 800 nm is -15 fs2, average reflectivity 93 %.

 

V. Pervak et al. “Dispersion control over the UV-VIS-NIR spectral range with HfO2/SiO2 chirped dielectric multilayers”, Opt. Lett. 32, 1183 (2007)

2) HDM (high-dispersive mirror)

HDM can be used as a replacement in a prism compressor making it compact. HDM provides dispersion -1300 fs2 in the range 770-830 nm, the reflectivity >99,9 % in all the spectral range.

V. Pervak, C. Teisset, A. Sugita, S. Naumov, F. Krausz, A. Apolonski, ”High-dispersive mirrors for femtosecond lasers”, Opt. Express 16, 10220 (2008)

3. LCO (a mirror with low spectral dispersion oscillations)

LCO was designed for experiments in an enhancement cavity and for high-energy Ti:Sa oscillator. It provides GDD -32 fs2 at 800 nm in a spectral range 770-830 nm with reflectivity >99,99 %.

V. Pervak, S. Naumov, F. Krausz, A. Apolonski, “Chirped mirrors with low dispersion ripple”, Opt. Express 15, 13768 (2007)

4. TOD (a dispersive mirror with a third-order dispersion)

TOD provides +600 fs3 at 800 nm. Spectral range: 670-1030 nm, average reflectivity >99,8 %.

 

F. Tavella, Y. Nomura, L. Veisz, V. Pervak, A. Marcinkevicius, F. Krausz, “Dispersion management for a sub-10-fs, 10-TW optical parametric chirped-pulse amplifier”, Opt. Lett. 32, 2227 (2007)

Examples for dispersive optics (CM) for Ti:Sa laser systems:

  • Broadband CM with the main level of GDD about -30 - -50 fs2, reflectivity >99 % in the range 400-1200 nm; CM for the range 300-900 with the reflectivity >95 % and dispersion -10 fs2 at 800 nm
  • Broadband CM with transmission at a certain wavelength (for example, 532 nm or 515 nm)
  • CM with high dispersion -200 - 300 fs2 in the wavelength range 720-860 nm with reflectivity >99.8 %
  • Beam splitter 50/50 % (or any other ratio) with controlled dispersion for transmitted and reflected beams in the wavelength range 450 – 1200 nm
  • Extremely high dispersive CM for a “long cavity oscillator” with main value of GDD about -1300 fs2 in the wavelength range 770 – 830 nm
  • CM with low dispersion oscillations (in design less than 0.5 fs2 and in realization less than 2 fs2 (rms)) in the wavelength range 770-830 nm, with reflectivity >99.99 %
  • High-TOD CM with TOD -600 fs3 in the wavelength range 600-1100 nm with reflectivity >99 %; mirrors have diameter up to 100 mm, and thickness up to 25 mm

Dispersive optics (for Yb:YAG oscillators) at 1030 nm:

High-dispersive CM with main GDD values about -200, -800, -2000, -2500, -10000 fs2 with reflectivity >99.9 %.

Other Optics:

  • AR coating in broadband range 400-1200 nm with reflectivity <0.3 % from the one surface
  • High reflection coating with reflectivity >99.99 %
  • Narrowband, band, edge filters
  • Low temperature high reflection mirror with reflectivity >99.99 %

For further information please contact

Dr. Vladimir Pervak

Dr. Alexander Apolonskiy