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LASER DIODE and DIODE ARRAY RELIABILITY (Continuation)

LASER DIODE and DIODE ARRAY RELIABILITY (Continuation). PCK-16. Description:. Benefits:.

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LASER DIODE and DIODE ARRAY RELIABILITY (Continuation)

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  1. LASER DIODE and DIODE ARRAY RELIABILITY(Continuation) PCK-16 Description: Benefits: Present laser diodes and laser diode arrays have significant reliability issues. A number of failures have been reported; most significantly the space-flight failures on GLASS and IceSAT have cost NASA tremendously in terms of science and dollars. The failure modes are due to a combination of problems with the reliability of the devices as well as the reliability of the packaging. The two are intimately related in a number of ways. The packaging, with these high powered laser systems, controls the device temperature (which in effect controls the device reliability). Iin addition to this, there are a number of packaging failure modes as well as packaging-process related failure modes that are also relevant and not well quantified. Also, the limited data provided by various vendors is not consistent due to a lack of standardization in testing and reporting. The objectives of this task are: 1. to characterize a relevant set of laser diodes and diode arrays with a standardized test set-up (coordinated with other NASA centers) and create a trade-space so that differing vendor data may be compared, 2. identify key device, package and process-related failure modes, and 3. provide the outline of a standard set of guidelines for the testing and reliability reporting of laser diodes and laser diode arrays. For the continuation tasks, the objective is to get lifetime data for lasers on test and to add additional lasers to the test matrix. Efforts will be coordinated with GSFC and LaRC S&MA experts currently working on similar issues. NASA uses an ever increasing number of power lasers and laser arrays. The lack of understanding of the various device, package and processing failure modes has been costly. The primary benefit of this task will be the ability to compare disparate vendor data and provide meaningful reliability data for NASA missions requiring lasers and laser arrays. The secondary benefit will be a detailed characterization of these failure modes and guidelines to prevent (or at least postpone) them. Deliverables: • FY06 Summary report on survey • FY06 Design of Experiments matrix • FY06 Summary of baseline data • FY07 Summary of lifetime data for lasers on test • FY07 Analysis of failure modes • FY07 Year end report providing Initial evaluation of packaging effects and lifetime including recommendations for package selection Schedule/Costs: Risks: NASA and Non-NASA Organizations/Procurements: Lead Center/PI: Gontijo Co-Is: Shapiro JPL is coordinating this task with guidance from GSFC (Melanie Ott), LaRC (Byron Meadows) and the NASA Diode Array Working Group. $xxK Additional Integrating Spheres and Power Supplies $xxK Additional Diode Laser and Array Assemblies

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