Dual-wavelength, continuous-wave Yb:YAG laser for high-resolution photothermal common-path interferometry.

We present a continuous-wave (CW) intracavity frequency-doubled Yb:YAG laser providing 1030 and 515 nm output simultaneously. This laser system was designed for photothermal common-path interferometry to measure spatially resolved profiles of the linear absorption in dielectric media and coatings for visible or infrared light as well as of the nonlinear absorption for the combination of both. A Z-shape laser cavity was designed, providing a beam waist in which an LBO crystal was located for effective second-harmonic generation (SHG). Suitable frequency conversion parameters and cavity configurations were discussed to achieve the optimal performance of a diode-pumped CW SHG laser. A 12.4 W 1030 nm laser and 5.4 W 515 nm laser were developed simultaneously in our experiment.

[1]  Ken-ichi Ueda,et al.  Comparative study the effect of Yb concentrations on laser characteristics of Yb:YAG ceramics and crystals , 2009 .

[2]  E. Heumann,et al.  All-solid-state continuous-wave frequency-doubled Nd:YAG-BiBO laser with 2.8-W output power at 473 nm. , 2003, Optics letters.

[3]  R. Beach.  CW Theory of quasi-three level end-pumped laser oscillators , 1996 .

[4]  A. Giesen,et al.  Multiwatt diode-pumped Yb:YAG thin disk laser continuously tunable between 1018 and 1053 nm. , 1995, Optics letters.

[5]  M. Obara,et al.  Development of a highly stable Yb:YAG thin disk pulsed green laser for high power Ti:sapphire based amplifier at 100 kHz repetition rate , 2007 .

[6]  Fuxi Gan,et al.  Dependence of the Yb 3+ emission cross section and lifetime on temperature and concentration in yttrium aluminum garnet , 2003 .

[7]  Dafu Cui,et al.  4.44 W of CW 515 nm green light generated by intracavity frequency doubling Yb:YAG thin disk laser with LBO , 2006 .

[8]  Minoru Obara,et al.  Generation of 5-W deep-UV continuous-wave radiation at 266 nm by an external cavity with a CsLiB6O10 crystal. , 2004, Optics letters.

[9]  Yoichi Sato,et al.  Absorption, emission spectrum properties, and efficient laser performances of Yb:Y3ScAl4O12 ceramics , 2004 .

[10]  Martin M. Fejer,et al.  Photothermal common-path interferometry (PCI): new developments , 2009, LASE.

[11]  Robert L. Byer,et al.  Modeling and CW operation of a quasi-three-level 946 nm Nd: YAG laser , 1987 .

[12]  R L Byer,et al.  Modeling of quasi-three-level lasers and operation of cw Yb:YAG lasers. , 1997, Applied optics.

[13]  Alexander M. Malyarevich,et al.  Passively Q-switched Ho3+:Y3Al5O12 laser using a PbSe-doped glass , 2001 .

[14]  G. Boyd,et al.  Parametric Interaction of Focused Gaussian Light Beams , 1968 .