1 W at 490 nm on a compact micro-optical bench by single-pass second harmonic generation

We demonstrate a compact 1 W laser module at 490 nm using a Distributed Bragg Reflector tapered diode laser in single-path second harmonic generation (SHG) configuration. The frequency conversion is performed with a 3 cm periodically poled MgO:LiNbO3 crystal on a micro-optical bench having a footprint of 2.5 cm3. 1 W blue light could be achieved at a pump power of about 9.5 W resulting in an optical conversion efficiency of about 10 %. The output power stability is better than ± 2% and the blue laser beam shows an excellent beam quality of M2σ = 1.2 in vertical and M2σ = 2 in lateral direction, respectively.

[1]  Katrin Paschke,et al.  Experimental and numerical study of Distributed-Bragg-Reflector tapered lasers , 2010 .

[2]  Alexander Sahm,et al.  4.5 W hybrid integrated master-oscillator power-amplifier at 976 nm on micro-optical bench , 2009, OPTO.

[3]  Christhard Deter,et al.  High-power laser projection displays , 2001, IS&T/SPIE Electronic Imaging.

[4]  J. N. Walpole,et al.  Semiconductor amplifiers and lasers with tapered gain regions , 1996 .

[5]  G. Erbert,et al.  Fundamental-Lateral Mode Stabilized High-Power Ridge-Waveguide Lasers With a Low Beam Divergence , 2008, IEEE Photonics Technology Letters.

[6]  D. Feise,et al.  High-Power DBR-Tapered Laser at 980 nm for Single-Path Second Harmonic Generation , 2009, IEEE Journal of Selected Topics in Quantum Electronics.

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

[8]  Andreas Klehr,et al.  980-nm DBR lasers using higher order gratings defined by i-line lithography , 2005 .

[9]  S. O'Brien,et al.  2.2-W continuous-wave diffraction-limited monolithically integrated master oscillator power amplifier at 854 nm , 1997, IEEE Photonics Technology Letters.

[10]  Katrin Paschke,et al.  Beam quality dependent SHG using edge-emitting lasers and a 50 mm bulk PPLN crystal , 2009, LASE.

[11]  Ole Bjarlin Jensen,et al.  1.5 W green light generation by single-pass second harmonic generation of a single-frequency tapered diode laser. , 2009, Optics express.

[12]  Katrin Paschke,et al.  400 mW and 16.5% wavelength conversion efficiency at 488 nm using a diode laser and a PPLN crystal in single pass configuration , 2008 .

[13]  D. Welch,et al.  Operating characteristics of a high-power monolithically integrated flared amplifier master oscillator power amplifier , 1993 .

[14]  Peter E. Andersen,et al.  Tunable high-power narrow-linewidth semiconductor laser based on an external-cavity tapered amplifier , 2005 .

[15]  R. Poprawe,et al.  Manufacturing with novel high-power diode lasers , 2000, IEEE Journal of Selected Topics in Quantum Electronics.

[16]  H. Qi,et al.  980-nm master oscillator power amplifiers with nonabsorbing mirrors , 1999, IEEE Photonics Technology Letters.

[17]  Katrin Paschke,et al.  High power single mode 980nm DBR tapered diode lasers with integrated sixth order surface gratings based on simplified fabrication process , 2006, SPIE Photonics Europe.

[18]  Katrin Paschke,et al.  12W high-brightness single-frequency DBR tapered diode laser , 2008 .