High-power high-reliability cw and qcw operation of single AlGaAs laser diode array design

Bo Lu; Erik P. Zucker; Edmund L. Wolak; Rainer G. Dohle; Daniel Zou; Steve Brickness

doi:10.1117/12.380546

29 March 2000 High-power high-reliability cw and qcw operation of single AlGaAs laser diode array design

Bo Lu, Erik P. Zucker, Edmund L. Wolak, Rainer G. Dohle, Daniel Zou, Steve Brickness

Proceedings Volume 3945, Laser Diodes and LEDs in Industrial, Measurement, Imaging, and Sensors Applications II; Testing, Packaging, and Reliability of Semiconductor Lasers V; (2000) https://doi.org/10.1117/12.380546
Event: Symposium on Integrated Optoelectronics, 2000, San Jose, CA, United States

Abstract

A single laser diode bar design, based on the AlGaAs material system, has been developed for high power, high reliability operation at a variety of CW and QCW operating conditions. The bar has a cavity length of 750 micrometer and a fill factor of 40%. Typical CW operation has a threshold current of approximately 10A and a conversion efficiency of greater than 45% at 40W. A variety of lifetests have been conducted at both CW and QCW operating conditions from the same bar design. On- going 3000 hr CW operation at 45C and 40W shows an extrapolated median lifetime (20% current increase) of 16,500 hrs at 45C or approximately 50,000 hrs at 25C (with 0.45eV activation energy). On-going 3000 hr QCW operation at 60C/60W and 35C/100W, with a pulse width of 200 microseconds and a duty factor of 2%, shows a median lifetime of approximately 10 billion shots and approximately 5 billion shots, respectively. In addition to single bar operation, this bar design can be stacked in various 2-D configurations. A 4 bar linear stack operating at 160W CW and a 6 bar vertical stack operating at 240W CW have been developed with superior performance. Results for high duty and low duty QCW stacks will also be presented.

Citation Download Citation

Bo Lu, Erik P. Zucker, Edmund L. Wolak, Rainer G. Dohle, Daniel Zou, and Steve Brickness "High-power high-reliability cw and qcw operation of single AlGaAs laser diode array design", Proc. SPIE 3945, Laser Diodes and LEDs in Industrial, Measurement, Imaging, and Sensors Applications II; Testing, Packaging, and Reliability of Semiconductor Lasers V, (29 March 2000); https://doi.org/10.1117/12.380546

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