Optical Sources

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Across
  1. 2. Fermi level closer to conduction band
  2. 4. impurity give up an electron to the conduction band.
  3. 6. drawback of LED
  4. 7. perfect material containing no impurities
  5. 9. on which depletion width increases
  6. 11. region where radiative recombination takes place
  7. 12. source that compatible with SMF
  8. 13. does not exhibit catastrophic degradation
Down
  1. 1. population of upper energy level is greater than population of lower energy level
  2. 3. cavity has mirror at both ends
  3. 4. higher external power efficiency than the planar LED
  4. 5. geometry which provides optical confinement in vertical direction
  5. 8. desirable spectral width for optical source
  6. 10. plane of active region is perpendicular to fiber axis