Laser Diodes
SRL's recent record 940W, with an efficiency of 57% CW output-power from a single 1cm-wide, 5mm cavity-length 77% fill-factor, 940nm laser diode bar at room temperature was presented at the Photonics West 2011 conference. In addition, SRL operated the bar for ~400 hours at 600W. Details of these findings were published in Proc. SPIE, vol. 7918, 2011:
- 70% efficient near 1kW single 1-cm laser-diode bar at 20°C,M. T. Knapczyk; J. H. Jacob; H. Eppich; A. K. Chin; K. D. Lang; J. T. Vignati; R. H. Chin,Proc. SPIE, vol. 7918, 2011
Also presented at the Photonics West 2011 conference SRL's record, 250W, CW output-power has been achieved for a single, 1cm-wide, 3.5mm cavity-length, 20% fill-factor, 976nm, laser-diode bar operated at 20°C. The remarkable laser-bar performance was in part the result of a novel EPIC (Enhanced Performance Impingement Cooler) heat-sink with a thermal resistance of 0.16K/W. The superb thermal management resulted in record brightness for a laser bar, i.e. a slow-axis divergence of 10° (95% power containment angle) was achieved at 200W output-power. A coupling efficiency of ~75% into a 200μm core, 0.22NA fiber was achieved. Details of these findings were published in Proc. SPIE, vol. 7918, 2011:
- Record CW-brightness from a single 20% fill-factor 1-cm laser-diode bar at 20°C,A. K. Chin; M. T. Knapczyk; J. H. Jacob; H. Eppich; K. D. Lang; R. H. Chin; M. Dogan, Proc. SPIE, vol. 7918, 2011
Two of SRL's discoveries were presented at the Photonics West 2009 conference. Details of these findings were published in Proc. SPIE, vol. 7198, 2009:
- Fault Protection of Broad-Area Laser Diodes, J.H. Jacob, R. Petr, M.A. Jaspan, S.D. Swartz, M.T. Knapczyk, A.M. Flusberg, A.K. Chin, and I. Smilanski, Proc. SPIE, vol. 7198, 2009
- A comprehensive model of catastrophic optical damage in broad-area laser diodes, A.K. Chin, R.K. Bertaska, M.A. Jaspan, A.M. Flusberg, S.D. Swartz, M.T. Knapczyk, R. Petr, I. Smilanski, and J.H. Jacob, Proc. SPIE, vol. 7198, 2009
Highlights from these papers, as well as additional materials regarding SRL's research and unique findings, can be found below:
- Catastrophic Optical-Damage in High-Power, Broad-Area Laser-Diodes, A.K. Chin, R.K. Bertaska, M.A. Jaspan, A.M. Flusberg, S.D. Swartz, M.T. Knapczyk, R. Petr, I. Smilanski, and J.H. Jacob, Mater. Res. Soc. Symp. Proc. Vol. 1195, 2009
- Bulk catastrophic optical-damage of 980nm, InxGa1-xAs/GaAs, high-power, broad-area laser-diodes due to a void in Au80Sn20 solder, A.K. Chin, R.K. Bertaska, H. Eppich, M.A. Jaspan, and J.H. Jacob, Mater. Res. Soc. Symp. Proc. Vol. 1195, 2009