THERMAL AND THERMO-MECHANICAL CHARACTERISTICS OF CRYOGENIC MICROCOOLER FOR OPTIMUM PERFORMANCE AND RELIABILITY

Abstract

This report details the characterization of cryogenic microcoolers for optimum thermal performance and thermo-mechanical reliability when employed for high power laser diodes (LDs). The goal was achieved by conducting two specific tasks: Development of Cryogenic Microcooler and Apparatus for High-Power LD Bar (Part I) and PoF-based Reliability Assessment of LD/Microcooler Subassembly Subjected to Cryogenic Operating Conditions (Part II). In Part I, an open-loop liquid nitrogen cooler for the cryogenic operation of LD bars was developed and tested. In Part II, the reliability of LD/microcooler subassemblies subjected to cryogenic operating conditions was assessed by proposing a hierarchical physics-of-failure-based reliability assessment model.

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Document Details

Document Type
Technical Report
Publication Date
Oct 19, 2017
Accession Number
AD1040433

Entities

People

  • Bongtae Han

Organizations

  • University of Maryland

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Climate Change
  • Electronics Laboratories
  • Heat Energy
  • Heat Transfer
  • Heat Transfer Coefficients
  • Laser Applications
  • Laser Diodes
  • Laser Science
  • Lasers
  • Latent Heat
  • Measurement
  • Power Electronics
  • Semiconductor Devices
  • Semiconductor Lasers
  • Semiconductors
  • Thermal Conductivity

Fields of Study

  • Engineering

Readers

  • Inertial Navigation Systems.
  • Thermal Physics or Thermal Science.

Technology Areas

  • Directed Energy