> I've used laser diodes that at 195A@1.9V produce 200W =

> @808nm which is a
> pretty impressive 53% efficient.

I was surprised by that figure, but it's not totall;ty =

inconsistent with other reports.

As of 2004 (!) SHEDS DARPA miliary units had achieved 65% =

and were aiming at 80%

        http://optics.org/cws/article/articles/19838

__________________________

      Photonics West, SAN JOSE, Calif.Alfalight, Inc., an =

innovative manufacturer of highly efficient and reliable =

high-power diode lasers, announced today at the Photonics =

West event (Booth # 242) the availability of their AMx-808B =

high-efficiency 808 nm line of chip-on-carrier and =

fiber-coupled single-emitter laser diodes. The improved =

power conversion efficiency (PCE) of these devices =

approaches 60% at room temperature and is over 55% across =

the entire operating temperature range of 0=BA C to 50=BA C.






        http://www.alfalight.com/pressreleases.asp


AND


2004    71% world record

      Alfalight Achieves World-Record Laser Diode Power =

Conversion Efficiency
      11/10/2004
      Rio Grande, PR - Lasers and Electro-Optics Society =

(LEOS) 2004 Annual Meeting - Alfalight, Inc., a technology =

innovator and manufacturer of highly efficient and reliable =

high-power diode lasers, today announced that it has set a =

world record for power conversion efficiency in 976 nm diode =

laser bars. Developed with support from the DARPA Super High =

Efficiency Diode Sources (SHEDS) program, Alfalight has =

demonstrated a 50 watt, 976 nm laser bar with 71% power =

conversion efficiency (PCE) at 25=B0C and 73% efficiency at =

10=B0C. These results were presented by Manoj Kanskar, vice =

president of Research and Development of Alfalight, at the =

conference on Wednesday morning. This achievement puts =

Alfalight well ahead of schedule in the Phase I SHEDS =

challenge to deliver 65% PCE diode laser bars to DARPA by =

March 2005, and approaches the 80% PCE targeted for =

September 2006 as part of SHEDS Phase II.

-- =

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