Up-screening of COTS Laser Diodes

Photodigm Inc.

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Photodigm now offers an up-screening service for space bound commercial-off-the-shelf (COTS) laser diodes and photodiodes including Photodigm’s TOSA and 9mm DBR laser diodes. Component lots meeting the 100% up-screening below will be sampled tested to a specification relevant to their use. These tests may include De-cap Internal visual, Steady State Operation Life, Total Dose Ionizing Radiation, and Non-ionizing Radiation. Other tests may be added as needed. Photodigm has the capabilities to process all product offerings including 9mm, 5.6mm, and TO-3 packages.

Typical COTS 100% Up-screening Flow:
   •  Procure sample of COTS device for DPA and DFEMA
   •  Destructive Physical Analysis (DPA) to determine if construction is capable of meeting mission requirements and if materials used are acceptable for flight environments
   •  Risk study including DFEMA (Design Failure Mode and Effect Analysis)
   •  Procure devices for Up-screening
   •  Laser Marking (Symbolize/Serialize)
   •  Temperature Cycling, Hermetic Seal, PIND, Constant Acceleration, and X-ray
   •  Pre-burn-in Optical and Electrical Testing
   •  Power burn-in/HTRB
   •  Post burn-in Optical and Electrical Testing

Delta and PDA Calculations Advantages: High volume reliability, lower cost, shorter procurement time, larger sampling plan quantities may be utilized during Qualification Testing, eliminate activities that do not add value, a shared radiation data base. Photodigm’s engineering staff has decades of experience in the qualification of COTS devices. Contact Photodigm for more information.

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