Bauteile für Ti:Saphir Laser

Components for Ti:Sapphire Lasers

Here we present optical components for Ti:Sapphire lasers which are operated with ns pulses. Please note that all of these components are optimized for smooth group delay (GD) spectra in order to achieve wide tuning ranges. However, these components are not optimized for group delay dispersion (GDD). Such optics which are necessary for fs pulses are introduced here and on pages 52 – 63 in our catalog.

Mirrors

broadband laser mirrorFigure 1: Reflectance (a) and GD (b) spectra of a broadband laser mirror
broadband pump mirrorFigure 2: Reflectance (a) and GD (b) spectra of a broadband pump mirror
broadband turning mirrorFigure 3: Reflectance (a) and GD (b) spectra of a broadband turning mirror

Special Features

  • Very high reflectance of the mirrors (R > 99.9 % … R > 99.98 % depending on the design)
  • Spectral tolerance: 1% of centre wavelength
  • Centre wavelength, bandwidth and reflectivity of partial reflectors according to customer specification

Output Couplers and Beamsplitters

standard and a broadband output coupler Figure 4: Reflectance spectra of a standard and a broadband output coupler (a) and of an output coupler with a special
reflectance profile which enables the compensation of the amplification characteristics of the laser (b);

see also:
B. Jungbluth, J. Wueppen, J. Geiger, D. Hoffmann, R. Poprawe: “High Performance, Widely Tunable Ti:Sapphire Laser with Nanosecond Pulses” in: Solid State Lasers XV: Technology and Devices, Proc. of SPIE Vol. 6100, 6100 - 20, San Jose 2006
broadband beam splitter Figure 5: Reflectance (a) and GD (b) spectra of a broadband beam splitter PRr(45°, 650 – 1050nm) = 50 ± 3%

Tolerances

Standard output couplers (bandwidth: 120–150 nm):
R = 10 … 70 %± 2.5 %
R = 70 … 90 %± 1.5 %
R = 90 … 95 %± 0.75 %
R = 95 … 98 %± 0.5 %
R > 98 %± 0.25 %
Standard output couplers (bandwidth: 120–150 nm):
R = 10 … 70 %± 3 %
R = 70 … 90 %± 2 %
R = 90 … 95 %± 1 %
R = 95 … 98 %± 0.5 %

Special Components

narrow band intra cavity filterFigure 6: Transmittance spectrum of a narrow band intra cavity filter for 860nm which is used to select one wavelength from the Ti:Sapphire spectrum
special turning mirrorFigure 7: Reflectance spectrum of a special turning mirror which separates the visible part of the Ti:Sapphire laser radiation from the NIR part